Sharp ER-A470

4) Transmission sequence flow
LINE ESTABLISHED
FULL DUPLEX ?
DCD OFF ? TIME OUT ?
RTS ON
DSR ON ?
FULL DUPLEX ?
DCD ON ?
CTS ON ?
TIME OUT ?
TIME OUT ?
YES
YES
YES
NO NO
5 sec
YES
YES
YES
YES
YES
NO
30 sec
NO
YES
7 sec (Programmable)
TXRDY ?
SEND 1 CHARACTER
MORE TO
SEND ?
FULL DUPLEX ?
WAIT 100ms
FULL
DUPLEX ?
RTS OFF
LINE ESTABLISHED
TRANSMIT ERROR
NO
YES
YES
YES
YES
LINE ESTABLISHED
RTS OFF
DTR OFF
RTS OFF
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