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    蓝牙传输穿戴设备之心律监测

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    Ajinder Singh, Natarajan Viswanathan TI Designs Wireless Heart Rate Monitor Reference Design TI Designs TI Designs provide the foundation that you need including methodology, testing and design files to quickly evaluate and customize and system. TI Designs help you accelerate your time to market. Design Resources TIDA-00096 ADS1293 CC2541 TPS61220 CC Debugger Tool Folder Containing Design Files Product Folder Product Folder Product Folder Small Programmer and Debugger for Low-Power RF System-on-Chips Design Features The Wireless Heart Rate Monitor with Bluetooth® lowenergy (BLE) is a reference design for customers to develop end-products for battery-powered 3-channel health and fitness electrocardiogram (ECG) applications. • Supports 5-Lead ECG applications • Easily monitor heart rate data through an iOS Mobile Application • Powered by a Lithium-ion battery • EMI filters integrated in the ADS1293 device reject Interference from outside RF sources • Open-source Firmware and iOS application enables quick time-to-market for customers Featured Applications • Health and Fitness ASK Our Analog Experts WebBench™ Calculator Tools An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other important disclaimers and information. WebBench is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 1 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated System Description www.ti.com 1 System Description The heart of the Wireless Heart Rate Monitor is the ADS1293 device (analog front-end) and the CC2541 device (Bluetooth-low energy SOC) as shown in Figure 1. The ADS1293 device is a highly integrated lowpower analog front-end (AFE) that features three high-resolution ECG channels. The CC2541 system-onchip (SoC) adds a BLE wireless feature to the platform. BLE enables seamless connectivity to an iPhone® or an iPad® through a configurable iOS application that allows an end-user to remotely monitor the heartrate data of a patient. 1.1 ADS1293 The ADS1293 incorporates all features commonly required in portable, low-power medical, sports, and fitness electrocardiogram (ECG) applications. With high levels of integration and exceptional performance, the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost. The ADS1293 features three high-resolution channels capable of operating up to 25.6ksps. Each channel can be independently programmed for a specific sample rate and bandwidth allowing users to optimize the configuration for performance and power. All input pins incorporate an EMI filter and can be routed to any channel via a flexible routing switch. Flexible routing also allows independent lead-off detection, right leg drive, and Wilson/Goldberger reference terminal generation without the need to reconnect leads externally. A fourth channel allows external analog pace detection for applications that do not utilize digital pace detection. For the ADS1293 block diagram, see Figure 2. The ADS1293 incorporates a self-diagnostics alarm system to detect when the system is out of the operating conditions range. Such events are reported to error flags. The overall status of the error flags is available as a signal on a dedicated ALARMB pin. The device is packaged in a 5-mm × 5-mm × 0,8-mm, 28-pin LLP. Operating temperature ranges from –20°C to 85°C. 1.2 CC2541 The CC2541 is a power-optimized true system-on-chip (SoC) solution for both Bluetooth low energy and proprietary 2.4-GHz applications. It enables robust network nodes to be built with low total bill-of-material costs. The CC2541 combines the excellent performance of a leading RF transceiver with an industrystandard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals. The CC2541 is highly suited for systems where ultralow power consumption is required. This is specified by various operating modes. Short transition times between operating modes further enable low power consumption. The CC2541 is pin-compatible with the CC2540 in the 6-mm × 6-mm QFN40 package, if the USB is not used on the CC2540 and the I2C/extra I/O is not used on the CC2541. Compared to the CC2540, the CC2541 provides lower RF current consumption. The CC2541 does not have the USB interface of the CC2540, and provides lower maximum output power in TX mode. The CC2541 also adds a HW I2C interface. The CC2541 is pin-compatible with the CC2533 RF4CE-optimized IEEE 802.15.4 SoC. The CC2541 comes in two different versions: CC2541F128/F256, with 128 KB and 256 KB of flash memory, respectively. For the CC2541 block diagram, see Figure 3. 1.3 TPS61220 The TPS6122x family devices provide a power-supply solution for products powered by either a singlecell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output currents depend on the input-to-output voltage ratio. The boost converter is based on a hysteretic controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent currents. The output voltage of the adjustable version can be programmed by an external resistor divider, or is set internally to a fixed output voltage. The converter can be switched off by a featured enable pin. While being switched off, battery drain is minimized. The device is offered in a 6-pin SC-70 package (DCK) measuring 2 mm × 2 mm to enable small circuit layout size. For the TPS61220 block diagram, see Figure 4. 2 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 2 Block Diagram Block Diagram ADS1293 Analog Front End CC2541 ADC + uP + BLE Battery TPS61220 Boost Converter Figure 1. Temperature Transmitter System Block Diagram 2.1 Highlighted Products The Wireless Heart Rate Monitor Reference Design features the following devices: • ADS1293 – ADS1293 Low Power, 3-Channel, 24-Bit Analog Front End for Biopotential Measurements • CC2541 – 2.4-GHz Bluetooth™ low energy and Proprietary System-on-Chip • TPS61220 – TPS6122x Low Input Voltage, 0.7V Boost Converter With 5.5μA Quiescent Current For more information on each of these devices, see the respective product folders at www.TI.com. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 3 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Block Diagram 2.1.1 ADS1293 VDD VSS CVREF RSTB XTAL2 XTAL1 VDDIO IN1 IN2 IN3 IN4 IN5 IN6 WCT Lead off detect LOD_EN EMI filter EMI filter EMI filter EMI filter EMI filter EMI filter Batt. Test Mon Ref REF + CH1 InA - Flexible Routing Switch + CH2 InA - + CH3 InA - Σ∆ Digital CH1-ECG Modulator Filter CH1-Pace Σ∆ Digital CH2-ECG Modulator Filter CH2-Pace Σ∆ Digital CH3-ECG Modulator Filter CH3-Pace WILSON_CN PACE2WCT WILSON_EN Wilson ref. + CH4 InA - CH4- Analog Pace SELRLD + CMDET_EN CM Detect RLD Amp. REF for CM & RLD PACE2 RLDIN POR OSC DIGITAL CONTROL AND POWER MANAGEMENT CLK DRDYB SDO SDI SCLK CSB ALARMB EMI filter EMI filter SYNCB VSSIO RLDREF RLDIN RLDINV RLDOUT CMOUT Figure 2. ADS1293 Block Diagram • Low current consumption: – Duty-Cycle mode: 120 μA – Normal mode: 415 μA • Wide supply range: 2.3 V to 5.5 V • Programmable gain: 1 V/V to 128 V/V • Programmable data rates: Up to 2 kSPS • 50-Hz and 60-Hz rejection at 20 SPS • Low-noise PGA: 90 nVRMS at 20 SPS • Dual matched programmable current sources: 10 μA to 1500 μA • Internal temperature sensor: 0.5°C Error (max) • Low-drift internal reference • Low-drift internal oscillator • Two differential or four single-ended inputs • SPI™-compatible interface • 3,5 mm × 3,5 mm × 0,9 mm QFN package www.ti.com 4 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 2.1.2 CC2541 RESET_N XOSC_Q2 XOSC_Q1 P2_4 P2_3 P2_2 P2_1 P2_0 P1_7 P1_6 P1_5 P1_4 P1_3 P1_2 P1_1 P1_0 P0_7 P0_6 P0_5 P0_4 P0_3 P0_2 P0_1 P0_0 SDA SCL I/O CONTROLLER Block Diagram RESET 32 MHz CRYSTAL OSC 32.768 kHz CRYSTAL OSC WATCHDOG TIMER CLOCK MUX & CALIBRATION DEBUG INTERFACE HIGH SPEED 32 kHz RC-OSC RC-OSC SFR bus ON-CHIP VOLTAGE REGULATOR POWER ON RESET BROWN OUT VDD (2.0 - 3.6 V) DCOUPL SLEEP TIMER POWER MGT. CONTROLLER 8051 CPU CORE DMA PDATA XRAM IRAM SFR UNIFIED MEMORY ARBITRATOR RAM SRAM FLASH FLASH IRQ CTRL ANALOG COMPARATOR OP-AMP DS ADC AUDIO / DC AES ENCRYPTION & DECRYPTION Radio Arbiter FIFOCTRL FLASH CTRL 1 KB SRAM RADIO REGISTERS Link Layer Engine SYNTH DEMODULATOR MODULATOR SFR bus I2C USART 0 FREQUENCY SYNTHESIZER USART 1 TIMER 1 (16-bit) TIMER 2 (BLE LL TIMER) TIMER 3 (8-bit) TIMER 4 (8-bit) RECEIVE TRANSMIT RF_P RF_N DIGITAL ANALOG MIXED Figure 3. CC2541 Block Diagram TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 5 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Block Diagram www.ti.com • RF – 2.4-GHz Bluetooth low energy Compliant and Proprietary RF System-on-Chip – Supports 250-kbps, 500-kbps, 1-Mbps, 2-Mbps Data Rates – Excellent link budget, enabling long-range applications without external front end – Programmable output power up to 0 dBm – Excellent receiver sensitivity (–94 dBm at 1 Mbps), selectivity, and blocking performance – Suitable for systems targeting compliance with worldwide radio frequency regulations: ETSI EN 300 328 and EN 300 440 Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan) • Layout – Few external components – Reference design provided – 6-mm × 6-mm QFN-40 package – Pin-compatible with CC2540 (when not using USB or I2C) • Low Power – Active-mode RX down to: 17.9 mA – Active-mode TX (0 dBm): 18.2 mA – Power mode 1 (4-µs wake-up): 270 µA – Power mode 2 (sleep timer on): 1 µA – Power mode 3 (external interrupts): 0.5 µA – Wide Supply-voltage range (2 V–3.6 V) • TPS62730 Compatible low power in active mode – RX down to: 14.7 mA (3-V supply) – TX (0 dBm): 14.3 mA (3-V supply) • Microcontroller – High-performance and low-power 8051 microcontroller core with code Prefetch – In-system-programmable flash, 128- or 256-KB – 8-KB RAM with retention in all power modes – Hardware-debug support – Extensive baseband automation, including auto-acknowledgment and address decoding – Retention of all relevant registers in all power modes • Peripherals – Powerful five-channel DMA – General-purpose timers (one 16-Bit, two 8-Bit) – IR generation circuitry – 32-kHz sleep timer with capture – Accurate digital RSSI support – Battery monitor and temperature sensor – 12-Bit ADC with eight channels and configurable resolution – AES security coprocessor – Two powerful USARTs with support for several serial protocols – 23 general-purpose I/O Pins (21 × 4 mA, 2 × 20 mA) – I2C interface – Two I/O pins have LED Driving capabilities – Watchdog timer – Integrated high-performance comparator • Development Tools 6 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Block Diagram – CC2541 evaluation module kit (CC2541EMK) – CC2541 mini development kit (CC2541DK-MINI) – SmartRF™ software – IAR embedded Workbench™ available • Software Features – Bluetooth v4.0 compliant protocol stack for single-mode BLE solution • Complete power-optimized stack, including controller and host • GAP – central, peripheral, observer, or broadcaster (including combination roles) • ATT / GATT – client and server • SMP – AES-128 encryption and decryption • L2CAP • Sample applications and profiles • Generic applications for GAP central and peripheral roles • Proximity, accelerometer, simple keys, and battery GATT services • More applications supported in BLE Software Stack • Multiple configuration options • Single-chip configuration, allowing applications to run on CC2541 • Network processor interface for applications running on an external microcontroller • BTool – Windows PC application for evaluation, development, and test TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 7 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Block Diagram 2.1.3 TPS61220 L VOUT VIN Gate Driver VIN Start Up EN Device Control VOUT Current Sensor FB GND VREF Figure 4. TPS61220 Block Diagram • Up to 95% efficiency at typical operating conditions • 5.5 μA quiescent current • Startup into load at 0.7-V input voltage • Operating input voltage from 0.7 V to 5.5 V • Pass-through function during shutdown • Minimum switching current 200 mA • Protections: – Output overvoltage – Overtemperature – Input undervoltage lockout • Adjustable output voltage from 1.8 V to 6 V • Fixed output voltage versions • Small 6-pin SC-70 package www.ti.com 8 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 3 Theory of Operation Theory of Operation 3.1 5-Lead ECG Application Figure 5 shows the ADS1293 device in a 5-Lead ECG system setup. The ADS1293 device uses the Common-Mode Detector to measure the common-mode of the patient’s body by averaging the voltage of input pins IN1, IN2 and IN3, and uses this signal in the right leg drive feedback circuit. NOTE: The ideal values of R1, R2 and C1 will vary per system/application; typical values for these components are: R1 = 100kΩ, R2 = 1MΩ and C1 = 1.5nF. The output of the RLD amplifier is connected to the right leg electrode, which is IN4, to drive the commonmode of the patient’s body. The Wilson Central Terminal is generated by the ADS1293 and is used as a reference to measure the chest electrode, V1. The chip uses an external 4.096MHz crystal oscillator connected between the XTAL1 and XTAL2 pins to create the clock sources for the device. 5V 0.1 F VDD VSS CVREF RSTB XTAL2 XTAL1 VDDIO 3.3V 1 MΩ 1F 5V 22 pF 5V 22 pF 3.3V 4.096 MHz 0.1 F RA LA V1 RL LL IN1 IN2 IN3 IN4 IN5 IN6 WCT + CH1 InA - Σ∆ Digital I Modulator Filter + CH2 InA - + CH3 InA - + InA - Σ∆ Digital II Modulator Filter Σ∆ Digital V Modulator Filter DIGITAL CONTROL AND POWER MANAGEMENT RLD Amp. SELRLD + WILSON_EN Wilson ref. CMDET_EN CM detect REF for CM & RLD CLK DRDYB SDO SDI SCLK CSB ALARMB CMOUT RLDOUT RLDINV RLDIN RLDREF SYNCB VSSIO C1 R2 R1 Figure 5. 5-Lead ECG Application 0.1 F 3.3V 1 MΩ CC2541 Communication The CC2541 device communicates to the ADS1293 device through SPI interface. The CC2541 device implements the application software to run this application through the 8051 microcontroller core in addition to running the BLE stack. For additional information, see Section 4.4. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 9 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Theory of Operation www.ti.com 3.2 Battery Life Calculation For battery life calculations, TI highly recommends that the user reviews CC2541 Battery Life Calculation, SWRA347. Comparing the power consumption of a BLE device to another device using a single metric is impossible. For example, a device gets rated by its peak current. While the peak current plays a part in the total power consumption, a device running the BLE stack only consumes current at the peak level during transmission. Even in very high throughput systems, a BLE device is transmitting for only a small percentage of the total time that the device is connected (see Figure 6). Figure 6. Current Consumption In addition to transmitting, there are other factors to consider when calculating battery life. A BLE device can go through several other modes, such as receiving, sleeping, and waking up from sleep. Even if the current consumption of a device in each different mode is known, there is not enough information to determine the total power consumed by the device. Each layer of the BLE stack requires a certain amount of processing to remain connected and to comply with the specifications of the protocol. The MCU takes time to perform this processing, and during this time, current is consumed by the device. In addition, some power might be consumed while the device switches between modes (see Figure 7). All of this must be considered to get an accurate measurement of the total current consumed. Figure 7. Current Consumption-Active versus Sleep Modes 10 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 4 Getting Started Getting Started 4.1 Software Requirements: • An iOS device: iPhone 4S and newer generations; iPad 3 and newer generations; fifth generation iPod (www.Apple.com) • 3.6-V Lithium-ion battery, recommended model BT-0001 Figure 8. 3.6-V Lithium-Ion Battery • CC Debugger (http://www.ti.com/tool/cc-debugger) 4.1.1 Installing the Application The application is not on iTunes (Apple Approved) for download. Download the application from the following link: TIDA-00096 iOS Application Software . Since the application is not on iTunes, use the steps below to install it manually. When the application is distributed manually, there is a limit on how many devices can the application can be loaded on. The UDID of each device needs to be provided before the application can be installed. Use the following steps to install the Wireless Heart Rate Monitor application on a device. 1. Connect the iPhone or iPad to the PC. 2. Open the iTunes application on the PC. 3. Wait for iTunes to identify that the device is connected to the PC. 4. The serial number of the device is listed as shown in Figure 9. Figure 9. Opening iTunes 5. In order to view the Identifier number (UDID), double click on Serial Number as shown in Figure 10 TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 11 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Getting Started www.ti.com Figure 10. Finding the UDID Number 6. Report the identifier number (UDID) number to the iPad developer. 7. After the UDID is added to the application (by the iPad developer), a .zip file is sent to the iTunes user that contains the application to download onto the smart device such as an iPhone4S®, iPhone 5®, or iPad4®. 8. Unzip the folder to view the application, ecgmonitor.ipa. 9. Open iTunes Once iTunes is open, use the following steps to install the application on the device. 1. Click the top-left button in the iTunes interface shown in Figure 11. Figure 11. iTunes library 2. Once the top-left button is clicked, a menu appears, click on Add File to Library (see Figure 12) to navigate to and select the ecgmonitor.ipa file from the file directory. 12 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Getting Started Figure 12. Add File to Library TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 13 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Getting Started 3. Go to the iPad page and click on the Apps menu as shown in Figure 13. www.ti.com Figure 13. Installing the Application on the iOS Device 4. Click on Install and then click Apply. Next, click on Sync. Then finally click Done. 4.2 Hardware Use to following steps to connect the Demo board. 1. Connect the battery (3.6 V nominal) to the P1 connector on the ADS1293BLE board. 2. Set the U2 switch to the ON position. 3. Uninstall J3. 4. Connect the ECG cable to the J1 connector on the ADS1293BLE board (see Figure 14). Figure 14. Hardware Setup 5. Connect the five leads to either an ECG simulator or to five electrode pads attached to the body. On the back of each lead is a label (RL, LL, LA, RA, and V1). NOTE: For the SKX2000 simulators connect V1 to the C1 terminal. If using the SKX2000 simulator, turn the simulator on and off by pressing the red button on the left side (see Figure 15). 14 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Getting Started Figure 15. ECG Emulator 4.3 Running the Demo • Open up the ADS1293 ECG monitor application on either an iPad or iPhone. Figure 16. ECG Monitor Application • Press the Start Scanning button as shown in Figure 17. Figure 17. Launch Application TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 15 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Getting Started www.ti.com • After several moments, the ADS1293 ECG Demo START button and the Bluetooth symbol appear as shown in Figure 18. NOTE: If the Bluetooth symbol does not appear, close the application and repeat the steps listed in Section 4.3. If the problem continues, see Section 5 below. Figure 18. Enable Bluetooth on iOS Device • The three channel readings are now available on the screen. If the board and ECG simulator are properly connected, the screen will appear similar to Figure 19 or Figure 20. – Figure 19 appears when connected to SKX2000 ECG Simulator. Figure 19. ECG Data Connected to the Simulator – Figure 20 appears when connected to the body. Figure 20. ECG Data Connected to the Body 16 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Getting Started 4.4 Firmware This section describes the over-the-air protocol to be used in the Wireless Heart Rate Monitor Reference Design. This section also provides an overview of the firmware development platform. To download the software and firmware, go to TIDA-00096. • iOS source code • CC2541 BLE source code 4.4.1 Communication Overview ECG data is sent as a burst of six BLE-notification packets every 14 ms. Each notification packet consists of 20 bytes containing the following: • ECG Sample1 (Raw ADC data) – Channel1 (3 bytes) – Channel2 (3 bytes) – Channel3 (3 bytes) • ECG Sample2 (Raw ADC data) – Channel1 (3 bytes) – Channel2 (3 bytes) – Channel3 (3 bytes) An ECG error or status packet is sent once every 17 ECG samples. ECG status packets contain the following: • 2-byte running counter • Status packet begin indication: 0xFF, 0xFF, 0xFF • 7-byte error status (ERROR_LOD, ERROR_STATUS, ERROR_RANGE1, ERROR_RANGE2, ERROR_RANGE3, ERROR_SYNC, ERROR_MISC) • Status packet end: 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF 4.4.2 ADS1293 ECG Demo: Complete Attribute Table Figure 21 shows the complete attribute table for the ADS1293 ECG-Demo. Services are shown in yellow, characteristics are shown in blue, and characteristic values and descriptors are shown in grey. The ADS1293 ECG demo implements a BLE peripheral device. The Demo supports an ECG peripheral profile based on the heart rate example of the CC254x Simple BLE Peripheral frame work. When configured by a peer device, the ECG peripheral application sends notification of the ECG measurement. On power up, advertising is enabled and the peer device must discover and initiate a connection procedure to the ECG peripheral. When the peer device configures the ECG measurement for notification, a timer starts and ECG measurements are sent periodically. In addition to ECG measurement, the peer device can read the number of ECG channels supported (characteristic 2) and the number of ECG-sample data sets per packet (characteristic 3). The peer device may also discover and configure the battery service for battery level-state notifications. This functionality is the same as supported in Simple BLE Peripheral framework. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 17 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Getting Started www.ti.com ECG Peripheral Application: Complete Attribute Table handle (hex) 0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17 0x18 0x19 0x1A 0x1B 0x1C Type (hex) 0x2800 0x2803 0x2D37 0x2902 0x2901 0x2803 0x2D38 0x2901 0x2803 0x2D39 0x2901 0x2803 0x2D3A Type Hex / Text Value (default) GATT_PRIMARY_SERVICE_UUID 0x2D0D (ECG_SERV_UUID) ECG_PROFILE_CHARACTER1_UUID ECG_MEAS_UUID 10 (properties: notify only) 12 00 (handle: 0x0012) 37 2D (UUID: 0x2D37) 00:00:00:00:00:00:00:00:00:00:00:00 (12 bytes) GATT_CLIENT_CHAR_CFG_UUID 00:00 (2 bytes) GATT_CHAR_USER_DESC_UUID "ECG Measurement Data\0" (21 bytes) 02 (properties: read only) ECG_PROFILE_CHARACTER2_UUID 16 00 (handle: 0x0016) 38 2D (UUID: 0x2D38) ECG_NUM_CHANS 03 (1 byte) GATT_CHAR_USER_DESC_UUID "Number of ECG Channels\0" (23 bytes) 02 (properties: read only) ECG_PROFILE_CHARACTER3_UUID 19 00 (handle: 0x0019) 39 2D (UUID: 0x2D39) ECG_SAMPLE_SETS 01 (1 byte) GATT_CHAR_USER_DESC_UUID ECG_PROFILE_CHARACTER4_UUID ECG_COMMAND "ECG Sample Sets Per Packet\0" (27 bytes) 08 (properties: write only) 1C 00 (handle: 0x001C) 3A 2D (UUID: 0x2D3A) 00 (1 byte) GATT Server Permissions GATT_PERMIT_READ Notes Start of ECG Profile Service Characteristic1 GATT_PERMIT_READ declaration (none) ECG data value Write "01:00" to enable GATT_PERMIT_READ | notifications. "00:00" to GATT_PERMIT_WRITE disable Characteristic1 user GATT_PERMIT_READ description Characteristic2 GATT_PERMIT_READ declaration GATT_PERMIT_READ GATT_PERMIT_READ Number of ECG Channels Characteristic3 user description Characteristic3 GATT_PERMIT_READ declaration GATT_PERMIT_READ GATT_PERMIT_READ Number of ECG Sample Sets per packet Characteristic3 user description Characteristic4 GATT_PERMIT_WRITE declaration GATT_PERMIT_READ ECG command set Figure 21. ECG Peripheral Application: Complete Attribute Table 18 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 4.4.3 ECG Notification Packet Figure 22 shows an example of captured ECG notification packets. Getting Started ECG Sample1 Data Running Counter Figure 22. ECG Notification Packet Table 1 lists the ECG notification data consisting of 20 bytes and the format. Table 1. ECG Notification Data Format(1) Byte Number Default Value Description 0 xxxx Running Counter – High byte 1 xxxx Running Counter – Low byte 2 0xD1 ECG Sample1: Channel 1 ADC High byte 3 0xD2 ECG Sample1: Channel 1 ADC Middle byte 4 0xD3 ECG Sample1: Channel 1 ADC Low byte 5 0xD4 ECG Sample1: Channel 2 ADC High byte 6 0xD5 ECG Sample1: Channel 2 ADC Middle byte 7 0xD6 ECG Sample1: Channel 2 ADC Low byte 8 0xD7 ECG Sample1: Channel 3 ADC High byte 9 0xD8 ECG Sample1: Channel 3 ADC Middle byte 10 0xD9 ECG Sample1: Channel 3 ADC Low byte 11 0xD1 ECG Sample2: Channel 1 ADC High byte 12 0xD2 ECG Sample2: Channel 1 ADC Middle byte 13 0xD3 ECG Sample2: Channel 1 ADC Low byte 14 0xD4 ECG Sample2: Channel 2 ADC High byte 15 0xD5 ECG Sample2: Channel 2 ADC Middle byte 16 0xD6 ECG Sample2: Channel 2 ADC Low byte 17 0xD7 ECG Sample2: Channel 3 ADC High byte 18 0xD8 ECG Sample2: Channel 3 ADC Middle byte 19 0xD9 ECG Sample2: Channel 3 ADC Low byte (1) The Allowed maximum size of notification packet is 20 bytes. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 19 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Getting Started www.ti.com 4.4.4 Connection Setup Bluetooth low-energy uses a 20-ms connection interval. Twenty user-data bytes (which is equal to 2samples for each channel and 2-bytes running counter) are sent in GATT notifications. Data from ADS1293 device is ping-pong buffered and up to six notifications are sent every 14 ms based on an OSAL timer. The ADS1293 sample rate is set as 160 samples/sec (SPS) (see the ADS1293 data sheet, SNAS602, for more information on R1 = 4, R2 = 5, and R3 = 32). Each sample is 3 bytes and is sending 3 channels. Firmware Development Platform One of the development platforms for the CC2541 8051 microcontroller is the IAR development platform. For information on this platform, goto http://www.iar.com. To communicate to the development platform through IAR, the CC Debugger is required as shown in Figure 23 The CC Debugger (shown in Figure 23) must be connected to the 10-pin header on the SAT0015 board. Ensure the notch on the cable that connects to the 10-pin header is towards the outside. If connected properly, the LED on the CC Debugger lights green. Figure 23. CC Debugger Launch the IAR project workspace as shown in Figure 24. Figure 24. Project Details. 20 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Ensure that the software is on version 8.20.1 or newer as shown in Figure 25. Getting Started Figure 25. Version Control Figure 26 shows the main entry function. Figure 26. Main Function TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 21 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Common Issues and Solutions Figure 27 shows the various communication settings for the application. www.ti.com Figure 27. Key Parameters Figure 28 shows that all of the key-configuration settings for the ADS1293 device are easily updated through the single function. Figure 28. Key Configuration Settings 5 Common Issues and Solutions Issue — The iPad or iPhone will not connect to the demo through Bluetooth. Solution: Ensure that the application is shut down completely before trying to reconnect. To shut down the application, hold the home button on the iPad or iPhone until the task manager window appears. This window shows all of the applications running in the background. Press and hold on the ADS1293 application until the X or - symbol appears. Click the X or - to completely shut down the application. Start again to reconnect the demo board. If the issue continues, see the following solution on adjusting the input voltage from the battery. 22 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 6 Test Data and Simulation Results Test Data and Simulation Results 6.1 Antenna Simulations The following data was simulated using the High-Frequency Structural Simulator (HFSS) from ANSYS (www.ansys.com). The goal of the antenna simulations was to validate that the 2.45-GHz antenna performed as expected. Figure 29. Antenna Simulation 6.2 Noise Test Results Figure 30 and Figure 31 show the input referred noise of the AFE. Input-Referred Noise (µV) Occurrences -6 -4. 2 -2. 4 -0. 6 1. 2 3 4. 8 6. 6 8. 4 10. 2 12 15 VDDIO = 3.3 V 10 5 0 -5 -10 3500 3000 VDDIO = 3.3 V 2500 2000 1500 1000 500 -15 0 12345678 Time (s) Figure 30. Input-Referred Noise 9 10 C004 0 Input-Referred Noise (µV) C006 Figure 31. Noise Histogram TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 23 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Test Data and Simulation Results www.ti.com 6.3 FFT Results Figure 32 and Figure 33 show the FFT results of the ADS1293 device corresponding to different peak rates. Amplitude (dBFS) Amplitude (dBFS) 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 0 Data Rate = 1067 SPS ECG BW = 215 Hz VDDIO = 3.3 V 40 80 120 160 200 240 Frequency (Hz) C007 Figure 32. FFT Plot ECG Channel (50-Hz Signal) 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 0 Data Rate = 25.6k SPS PACE BW = 2550 Hz VDDIO = 3.3 V 400 800 1200 1600 2000 Frequency (Hz) Figure 33. FFT Plot Pace Channel (50-Hz Signal) 2400 C008 6.4 EMI Test Results of the ADS1293 DUT 4L2 4L2 4L2 4L2 6L1 6L1 6L1 6L1 11L1 11L1 11L1 11L1 Frequency MHz 400 900 1800 2400 400 900 1800 2400 400 900 1800 2400 Table 2. Test Results Vos_Off (uV) -4.94 -4.82 -5.05 -4.95 19.03 19 19 19.01 -4.55 -4.38 -4.39 -4.42 Vos_On (uV) -4.93 -5 -4.98 -4.9 18.99 18.97 18.98 18.99 -4.36 -4.26 -4.48 -4.37 Vrf_pp (mV) 130.8 103.4 90 45.2 218.1 225.6 185.7 41.9 204.1 204.8 147.2 47.73 EMIRR 132.6231099 103.4341716 109.2265398 100.1849375 129.463827 132.5499389 132.6906764 106.8267612 114.7774483 118.8283733 115.5902624 101.1310575 24 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Test Data and Simulation Results Figure 34. Setup for ECG Data Figure 35. ECG Data as Shown on an iOS Device FCC Compliance The Wireless Heart Rate Monitor Reference Design platform uses a similar RF design (antenna design) that complied with the following standards: • EN 300 328 • FCC 15.247 • IC RSS-210 • EN 301 489-17 FCC and IC Regulatory Compliance standards: – FCC – Federal Communications Commission Part 15, Class A – IC – Industry Canada ICES-003 Class A See the Gas Sensor Platform Reference Design (SNOA922) for reference. TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 25 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Schematics 7 Schematics P1 Li ION Battery (1s) UNIDEN 3.6V 720mA h 1 inchX2inch www.ti.com 1 2 3 D2 SBR0220T5-7-F 0.47V U2 1 4 2 5 3 6 EG1390B C20 0.1µF VDD_3 = V_Lithium (if V_Lithium>3V) VDD_3 = 3V (if V_Lithium<3V) V_Lithium V_Lithium C21 47µF L5 4.7µH U3 EPL3015-472MLB 5 L VOUT 4 1 VIN FB 2 C22 10µF 6 EN GND 3 TPS61220DCK VDD_3 R16 1.00Meg C23 10µF R17 200k Figure 36. Power Section 26 Wireless Heart Rate Monitor Reference Design Copyright © 2014, Texas Instruments Incorporated TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback www.ti.com J1 5 9 4 8 10 3 7 11 2 6 1 1734348-1 VDD_3 VDD_3 CVREF C1 0.1µF C2 0.1µF U1 V1 C3 1µF 22 28 27 26 VDDIO VDD VSS CVREF RL LL LA RA RA LA LL RL V1 R5 0 R6 0 R9 0 R11 0 R12 0 1 2 3 4 5 6 IN1 IN2 IN3 IN4 IN5 IN6 DRDYB SDO SDI SCLK CSB ALARMB 20 19 18 17 16 15 CMOUT RLDOUT R15 10k RLDINIV R32 10.0Meg C5 RLDIN 1nF VDD_3 C4 0.1µF 8 9 10 11 12 CMOUT RLDOUT RLDINV RLDIN RLDREF WCT WCT 7 C7 0.1µF C31 22pF C6 22pF VDD_3 1 2 24 Y1 23 ECS-41-18-5PXEN-TR 4.096MHz 13 25 XTAL2 XTAL1 SYNCB RSTB CLK 21 VSSIO 14 R34 1.0Meg PAD ADS1293CISQE/NOPB R35 R36 VDD_3 1.0Meg 0 S1 1 2 PTS635SL50LFS RSTB_1293 Figure 37. Analog Front End R2 51 R4 51 CLK Schematics MISO MOSI C SS VDD_3 R1 1.0Meg DRDYB VDD_3 R14 1.0Meg ALARMB TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Wireless Heart Rate Monitor Reference Design 27 Schematics VDD_FILT FB1 1000 ohm VDD_3 www.ti.com 2 1 C24 C25 1µF 0.1µF C26 0.1µF C27 0.1µF C28 0.1µF C29 220pF C30 0.1µF C8 2.2µF V_Lithium R13 2.00Meg R21 3.01Meg SPI BUS TO ADS1293 SoC Debug/Flash J2 VDD_FILT 1 2 3 4 5 6 7 8 9 P2_2/DC P2_1/DD P0_4/SSN P0_5/SCK GND RESET_N P0_3/MISO 10 P0_2/MOSI CONN_FTSH-105-01-L-DV R7 0 SS C MISO MOSI ALARMB DRDYB J3 1 2 U4 P2_1/DD P2_2/DC PULSE_BEAT R37 0 R28 0 R30 0 R29 0 R20 0 R31 0 R8 0 R25 0 R3 0 R18 0 R19 0 39 10 DVDD1 DVDD2 1 2 3 4 GND SCL SDA NC 36 35 34 P2_0 P2_1 P2_2 AVDD6 AVDD5 AVDD4 AVDD3 AVDD2 AVDD1 31 21 29 24 27 28 1293_RSTB BLE_RST R22 0 11 9 8 7 6 5 38 37 P1_0 P1_1 P1_2 P1_3 P1_4 P1_5 P1_6 P1_7 19 18 17 16 15 14 13 12 P0_0 P0_1 P0_2 P0_3 P0_4 P0_5 P0_6 P0_7 20 RESET_N RF_P 25 RF_N 26 P2_4 P2_3 32 33 XOSC_Q1 XOSC_Q2 22 23 DCOUPL 40 RBIAS 30 THERM_PAD 41 R26 R10 2.74k CC2541RHA 0 C19 P0_2/MOSI P0_4/SSN 1000pF P0_3/MISO P0_5/SCK RESET_N X2 3 1 G G 4 2 Q22FA1280009200 32MHz C15 1µF C17 12pF R23 56.2k BLE_RST R40 S2 0 1 2 PTS635SL50LFS 1293_RSTB RSTB_1293 Figure 38. ADS1293 Section A3 ANTENNA IIFA BLE C9 L1 L2 1pF L3 LQG15HS2N2S02DLQG15HH5N1S02D LQG15HS2N0S02D 2.2nH C10 5.1nH 2nH 0.4pF C11 18pF C12 X1 1 2 18pF ABS07-32.768KHZ-9-T 32.768kHz L4 LQG15HS2N0S02D C13 2nH 1pF C14 15pF C16 C18 15pF 12pF PULSE_BEAT R24 2.21k D1 Yellow 28 Wireless Heart Rate Monitor Reference Design Copyright © 2014, Texas Instruments Incorporated TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback www.ti.com 8 Bill of Materials To download the bill of materials (BOM) for each board, see the design files at TIDA-00096. Table 3 lists the BOM. Designator !PCB C1, C2, C4, C7 C3 C5 C6, C31 C8 C9, C13 C10 C11, C12 C14, C16 C15, C24 C17, C18 C19 C20, C25, C26, C27, C28, C30 C21 C22, C23 C29 D1 D2 FB1 J1 J2 J3 L1 L2 Quantity 1 4 1 1 2 1 2 1 2 2 2 2 1 6 1 2 1 1 1 1 1 1 1 1 1 Value 0.1 µF 1 µF 1000 pF 22 pF 2.2 µF 1 pF 0.4 pF 18 pF 15 pF 1 µF 12 pF 1000 pF 0.1 µF Table 3. BOM Description Printed Circuit Board CAP, CERM, 0.1 µF, 25 V, ±5%, X7R, 0603 CAP, CERM, 1 µF, 16 V, ±10%, X5R, 0805 CAP, CERM, 1000 pF, 100 V, ±5%, C0G/NP0, 0603 CAP, CERM, 22 pF, 50 V, ±5%, C0G/NP0, 0603 CAP, CERM, 2.2 µF, 6.3 V, ±20%, X5R, 0402 CAP, CERM, 1 pF, 50 V, ±5%, C0G/NP0, 0402 CAP, CERM, 0.4 pF, 50 V, ±25%, C0G/NP0, 0402 CAP, CERM, 18 pF, 50 V, ±5%, C0G/NP0, 0402 CAP, CERM, 15 pF, 50 V, ±5%, C0G/NP0, 0402 CAP, CERM, 1 µF, 6.3 V, ±20%, X5R, 0402 CAP, CERM, 12 pF, 50 V, ±5%, C0G/NP0, 0402 CAP, CERM, 1000 pF, 50 V, ±5%, C0G/NP0, 0402 CAP, CERM, 0.1 µF, 10 V, ±10%, X7R, 0402 PackageReference 0603 0805 0603 0603 0402 0402 0402 0402 0402 0402 0402 0402 0402 PartNumber SAT0015 06033C104JAT2A 0805YD105KAT2A C1608C0G2A102J 06035A220JAT2A JMK105BJ225MV-F GRM1555C1H1R0CA01D GRM1555C1HR40BA01D GRM1555C1H180JA01D GRM1555C1H150JA01D C1005X5R0J105M GRM1555C1H120JA01D GRM1555C1H102JA01D GRM155R71A104KA01D 47 µF 10 µF 220 pF Yellow 0.47V 1000 Ω FTSH-105-01L-DV 2.2nH 5.1nH CAP, CERM, 47 µF, 6.3 V, ±10%, X5R, 1206 1206 CAP, CERM, 10 µF, 6.3 V, ±20%, X5R, 0603 0603 CAP, CERM, 220 pF, 50 V, ±5%, C0G/NP0, 0402 0402 LED, Yellow, SMD Yellow LED Diode, Schottky, 20 V, 0.2 A, SOD-523 SOD-523 0.25A Ferrite Bead, 1000 Ω at 100 MHz, SMD 0402 Conn D-SUB RCPT R/A 9POS GOLD/FL, TH D-SUB 9 PIN Header, 2 × 5 pin 50 mil spacing 0.222 × 0.330 inch Header, TH, 100mil, 2 × 1, Gold plated, 230 mil above insulator Inductor, Multilayer, Air Core, 2.2 nH, 0.3 A, 0.12 Ω, SMD Inductor, Multilayer, Ferrite, 5.1 nH, 0.3 A, 0.2 Ω, SMD TSW-102-07-G-S 0402 polarized 0402 GRM31CR60J476KE19L GRM188R60J106ME47D GRM1555C1H221JA01D SML-P12YTT86 SBR0220T5-7-F BLM15HG102SN1D 1734348-1 FTSH-105-01-L-DV TSW-102-07-G-S LQG15HS2N2S02D LQG15HH5N1S02D Bill of Materials Manufacturer Any AVX AVX TDK AVX Taiyo Yuden MuRata MuRata MuRata MuRata TDK MuRata MuRata MuRata MuRata MuRata MuRata RΩ Diodes Inc. MuRata TE Connectivity Samtec Samtec, Inc. MuRata MuRata TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Wireless Heart Rate Monitor Reference Design 29 Bill of Materials Designator L3, L4 Quantity 2 L5 1 P1 1 R1, R14, R34, R35 4 R2, R4 2 R3, R5, R6, R7, 21 R8, R9, R11, R12, R18, R19, R20, R22, R25, R26, R28, R29, R30, R31, R36, R37, R40 R10 1 R13 1 R15 1 R16 1 R17 1 R21 1 R23 1 R24 1 R32 1 S1, S2 2 U1 1 U2 1 U3 1 U4 1 X1 1 X2 1 Y1 1 Value 2nH 4.7uH 1.0Meg 51 0 2.74k 2 Meg 10k 1 Meg 200k 3.01 Meg 56.2k 2.21k 10 Meg Table 3. BOM (continued) Description Inductor, Multilayer, Ferrite, 2 nH, 0.3 A, 0.1 Ω, SMD Inductor, Shielded, Ferrite, 4.7 µH, 1.2 A, 0.14 Ω, SMD Header, 3-Pin, Right Angle RES, 1 MΩ, 5%, 0.063 W, 0402 RES, 51 Ω, 5%, 0.063 W, 0402 RES, 0 Ω, 5%, 0.063 W, 0402 PackageReference 0402 Inductor, 3 × 1,55 × 3 mm 0402 0402 0402 PartNumber LQG15HS2N0S02D EPL3015-472MLB 0530480310 CRCW04021M00JNED CRCW040251R0JNED CRCW04020000Z0ED RES, 2.74 kΩ, 1%, 0.063 W, 0402 RES, 2 MΩ, 1%, 0.063 W, 0402 RES, 10 kΩ, 5%, 0.063 W, 0402 RES, 1 MΩ, 1%, 0.063 W, 0402 RES, 200 kΩ, 1%, 0.063 W, 0402 RES, 3.01 MΩ, 1%, 0.063 W, 0402 RES, 56.2k Ω, 1%, 0.063 W, 0402 RES, 2.21k Ω, 1%, 0.063 W, 0402 RES, 10 MΩ, 1%, 0.063 W, 0402 Switch, tactile, SPST-NO, 0.05 A, 12V, TH ADS1293 low power, 3-channel, 24-bit analog front-end for Biopotential measurements, RSG0028A Slide switch DPDT 0.3 A, SMT Low input voltage step-up converter in 6-pin SC70 package, DCK0006A 2.4-GHz Bluetooth low energy and proprietary System-on-Chip, RHA0040H CRYSTAL, 32.768 KHZ, 9 pF, SMD Crystal, 32 MHz, 10 pF, SMD Crystal, 4.096 MHz, 18 pF, SMD 0402 0402 0402 0402 0402 0402 0402 0402 0402 SW, SPST 3,5 × 5 mm RSG0028A CRCW04022K74FKED CRCW04022M00FKED CRCW040210K0JNED CRCW04021M00FKED CRCW0402200KFKED CRCW04023M01FKED CRCW040256K2FKED CRCW04022K21FKED CRCW040210M0FKED PTS635SL50LFS ADS1293CISQE/NOPB 7,2 × 3,5 × 3,5 mm DCK0006A EG1390B TPS61220DCK RHA0040H CC2541RHA 3,2 × 0.9 × 1,5 mm Crystal, 2,6 × 0,5 × 1,6 mm Crystal, 11,4 × 4,3 × 3,8 mm ABS07-32.768KHZ-9-T Q22FA1280009200 ECS-41-18-5PXEN-TR www.ti.com Manufacturer MuRata Coilcraft Molex Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale C&K Components Texas Instruments E-Switch Texas Instruments Texas Instruments Abracon Corportation Epson ECS, Inc. 30 Wireless Heart Rate Monitor Reference Design Copyright © 2014, Texas Instruments Incorporated TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback www.ti.com Layer Plots 9 Layer Plots To download the layer plots for each board, see the design files at TIDA-00096. Figure 39 shows the layer plots. Figure 0. UNDEFINED Figure 0. UNDEFINED Figure 0. UNDEFINED Figure 0. UNDEFINED Figure 0. UNDEFINED Figure 39. Layer Plot Figure 0. UNDEFINED Figure 0. UNDEFINED Figure 0. UNDEFINED TIDU195A – January 2014 – Revised July 2014 Wireless Heart Rate Monitor Reference Design 31 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Altium Project www.ti.com 10 Altium Project To download the Altium project files for each board, see the design files at TIDA-00096. Figure 40, Figure 41, Figure 42, and Figure 43 show the layout. Figure 40. All Layers Figure 42. Ground Layer Figure 41. Bottom Layer Figure 43. Top Layer 32 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com 11 Gerber Files To download the Gerber files for each board, see the design files at TIDA-00096. Gerber Files TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback Figure 44. Fab Drawing Copyright © 2014, Texas Instruments Incorporated Wireless Heart Rate Monitor Reference Design 33 Software Files 12 Software Files To download the software files for the reference design, see the design files at TIDA-00096. References For additional references, please see the following: 1. Bluetooth Low Energy CC2540 Mini Development Kit User’s Guide, SWRU270 www.ti.com 13 About the Author AJINDER PAL SINGH is a Systems Architect at Texas Instruments where he is responsible for developing reference design solutions for the industrial segment. Ajinder brings to this role his extensive experience in high-speed digital, low-noise analog and RF system-level design expertise. Ajinder earned his Master of Science in Electrical Engineering (MSEE) from Texas Tech University in Lubbock, TX. Ajinder is a member of the Institute of Electrical and Electronics Engineers (IEEE). NATARAJAN VISWANATHAN, also known as Vishy, is an Applications Engineer at Texas Instruments Silicon Valley Analog where he is involved in developing embedded firmware, evaluation tools, and customer demo systems. Vishy has broad experience with system on chips, microcontrollers, and application processors. Vishy earned his Masters and PhD from the Indian Institute of Science, Bangalore. 34 Wireless Heart Rate Monitor Reference Design TIDU195A – January 2014 – Revised July 2014 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com Revision History Revision History Changes from Original (January 2014) to A Revision .................................................................................................... Page • Changed to the correct name for the design........................................................................................... 3 • Added paragraph explaining that installation of application is manual, but the designer must still connect to iTunes to install the application. ................................................................................................................... 11 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. TIDU195A – January 2014 – Revised July 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Revision History 35 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES 1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. 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Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur 3.3 Japan 3.3.1 Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に 輸入される評価用キット、ボードについては、次のところをご覧ください。 http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 3.3.2 Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan are NOT certified by TI as conforming to Technical Regulations of Radio Law of Japan. If User uses EVMs in Japan, User is required by Radio Law of Japan to follow the instructions below with respect to EVMs: 1. Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, 2. Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to EVMs, or 3. Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan. SPACER SPACER SPACER SPACER SPACER 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 本開発キットは技術基準適合証明を受けておりません。 本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・インスツルメンツ株式会社 東京都新宿区西新宿6丁目24番1号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER 4 EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information related to, for example, temperatures and voltages. 4.3 Safety-Related Warnings and Restrictions: 4.3.1 User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or property damage. If there are questions concerning performance ratings and specifications, User should contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit components may have elevated case temperatures. These components include but are not limited to linear regulators, switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the information in the associated documentation. When working with the EVM, please be aware that the EVM may become very warm. 4.3.2 EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, and subsystems. User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees, affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or designees. 4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal, state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local requirements. 5. Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as accurate, complete, reliable, current, or error-free. SPACER SPACER SPACER SPACER SPACER SPACER SPACER 6. Disclaimers: 6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS. 6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF THE EVM. 7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES, EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED. 8. Limitations on Damages and Liability: 8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS, LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED. 8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT. 9. Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s) will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s), excluding any postage or packaging costs. 10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas, without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas. Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. spacer Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2014, Texas Instruments Incorporated IMPORTANT NOTICE FOR TI REFERENCE DESIGNS Texas Instruments Incorporated ("TI") reference designs are solely intended to assist designers (“Buyers”) who are developing systems that incorporate TI semiconductor products (also referred to herein as “components”). Buyer understands and agrees that Buyer remains responsible for using its independent analysis, evaluation and judgment in designing Buyer’s systems and products. TI reference designs have been created using standard laboratory conditions and engineering practices. TI has not conducted any testing other than that specifically described in the published documentation for a particular reference design. TI may make corrections, enhancements, improvements and other changes to its reference designs. Buyers are authorized to use TI reference designs with the TI component(s) identified in each particular reference design and to modify the reference design in the development of their end products. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN, including but not limited to any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services, or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. TI REFERENCE DESIGNS ARE PROVIDED "AS IS". TI MAKES NO WARRANTIES OR REPRESENTATIONS WITH REGARD TO THE REFERENCE DESIGNS OR USE OF THE REFERENCE DESIGNS, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ACCURACY OR COMPLETENESS. TI DISCLAIMS ANY WARRANTY OF TITLE AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, QUIET POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO TI REFERENCE DESIGNS OR USE THEREOF. TI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY BUYERS AGAINST ANY THIRD PARTY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON A COMBINATION OF COMPONENTS PROVIDED IN A TI REFERENCE DESIGN. IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL, SPECIAL, INCIDENTAL, CONSEQUENTIAL OR INDIRECT DAMAGES, HOWEVER CAUSED, ON ANY THEORY OF LIABILITY AND WHETHER OR NOT TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, ARISING IN ANY WAY OUT OF TI REFERENCE DESIGNS OR BUYER’S USE OF TI REFERENCE DESIGNS. TI reserves the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. Testing and other quality control techniques for TI components are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguards. Reproduction of significant portions of TI information in TI data books, data sheets or reference designs is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous failures, monitor failures and their consequences, lessen the likelihood of dangerous failures and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in Buyer’s safety-critical applications. In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms. No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed an agreement specifically governing such use. Only those TI components that TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components that have not been so designated is solely at Buyer's risk, and Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2014, Texas Instruments Incorporated

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