单片机试题解答1．当CPU响应外部中断0后,PC的值是( A )A.0003H B.2000H C.000BH D.3000H 2．当MCS-51复位时,下面说法准确的是（A） A.PC=0000H B.SP=00H C.SBUF=00H D.（30H）=00H3．要用传送指令访问MCS-51片外RAM,它
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