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Citizen Systems CBM-230/231 User Manual

Page 30

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CBM-230/231 User’s Manual

CITIZEN

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7.3.4 Data Receiving Control

When DTR/DSR control has been selected, if the DTR signal is at SPACE, the data from the host side can be

received, but when at MARK, it cannot be received.

When DTR/DSR control has not been selected, the data from the host side can be received after transmitting

XON, but it cannot be received after transmitting XOFF.

7.3.5 Buffering

There are DTR and TD signals as control signals for data transfer to the input buffer.
(1) DTR signal (Refer to 7.3 1)
(2) TD signal (Refer to 7.3 1)