描述:Quartz Crystal Resonator HC49/UP Short 2 Pad Surface Mount (SMD) 3.2mm Height Metal Resistance Weld Seal 14.131818MHz ±15ppm/20ppm over -20°C to +70°C Brand Name:Ecliptek 是否无铅:不含铅 是否Rohs认证:符合
描述:Thick Film Resistors - Through Hole 330 ohm 30W 1% TO-220 PKG PWR FILM Product Category:Metal Film Resistors - Through Hole Manufacturer:Vishay(威世) RoHS:No
菜鸟才接触89c51,写的如下代码,但是中断不响应,我在INT0输入的是方波信号,还有这块是16位寻址哈也就是unsigned int 型最大值是65536哈,我想是让int0为高电平时,计数器开始计数,当int0下一个高电平到来之后计数器重新计数,一直这样循环响应并计数,该怎么写呢!!先谢谢各位大侠了UINT count1 = 0;//计算计数器溢出的次数void time0(void) int
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