题目内容

The unit of Porter is ()

A. Characters per second
Bit per second
C. Frames per second
D. Bytes per second

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In the CPU, the registers that reflect the running state of the program or some characteristics of the operation results are ()

A. PC
B. PSW
C. A
D. SP

The function of the 9th data bit of serial port communication can be defined by the user.

A. 对
B. 错

The content of the 9th bit of the transmitted data is prepared in advance in the TB8 bit of the SCON register.

A. 对
B. 错

When the serial communication mode 2 or mode 3 sends, the instruction sends the status of TB8 bit into the sending SBUF.

A. 对
B. 错