For ADC0809, which of the following signals indicate that converted data is ready and available? ()
A. START
B. ALE
C. OE
D. EOC
查看答案
8051 interrupt service routines are always terminated with the RET instruction. ( )
When the 8051 TMOD register is set with 80H, the Timer 1 can be started by only setting TR1. ( )
The ADC0809 chip is 8-channel ADC, it can monitor multiple inputs, but only one input at a time. ( )
Any pin of 8051 ports must output logic ______ to enable the pin to read the input.