题目内容
Memory address ______ H in the interrupt vector table is assigned to serial port, and the memory address ______ H is assigned to external interrupt 0.
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To show upper case English letter 'L' on a common cathode 7-segment display, the segment code should be set with ______ H in hex form.
When 8051 serial port operates in Mode 2, to transmit the ninth bit, it should store into ().
8051 serial data transmission is initiated by ().
The 8051 timers in mode 0 will overflow if one more signal comes after the register reaching ().
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