mega16 单片机 cvavr 秒表，两个IO口串行输出段码，PA0接164的AB(即12号引脚),PA1接CLK(8),CLR接高电平，QH-QA接a——p，PC0-PC5接LED的6到0位控端-mega16 SCM cvavr stopwatch, two serial output section of the IO port code, PA0 received 164 AB (that is, 12-pin), PA1 then CLK (8), CLR then high, Q