SparkFun 配件 Standard 'Watch' or Real-Time-Clock crystal. 32.768kHz means it is precisely half of a 16-bit counter. Start counting at 0x8000 (or 32768). When the counter rolls over from 65535 to 0 then you know that exactly one second has passed. Reset the inter
- COM-00540
- SparkFun
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1:
¥16.1251
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无库存