题目内容
The serial port data buffer SBUF is a special register which can be directly addressed.
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To allow external interrupt 0 interrupt, set EA bit and ex0 bit of interrupt allow register ie to 1.答案:
The meaning of instruction JNB TF0, LP is: if the timer T0 is not full, turn to LP.
If the timer / counter T1 of 8051 is set in timing mode and working in mode 2, the working mode word is 20h.
If the timer / counter T1 of 8051 is set in counting mode and working in mode 1, the working mode word is 50h.
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