The asynchronous communication interface shown in Fig. 11-8 is connected between a CPU and a printer. Draw
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The asynchronous communication interface shown in Fig. 11-8 is connected between a CPU and a printer. Draw a flowchart that describes the sequence of operations in the transmitter portion of the interface when the CPU sends characters to be printed.
Fig. 11-8
Transcribed Image Text:
Bidirectional data bus Chip select Register select 1/0 read 1/0 write CS RS RD Bus buffers WR 1 1 1 Timing and control 1 X CS RS Operation Register selected 0 1 0 1 X WR WR RD Internal bus RD Transmitter register Control register Status register Receiver register Shift register Control register Receiver register Status register Transmitter control and clock Receiver control and clock Shift register None: data bus in high-impedance Transmitter register Transmit data Transmitter clock Receiver clock Receive data
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ANSWER step 1 of 2 Refer to Figure 118 given in the textbook The figure shows the asynchronous commu...View the full answer
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