Sharp XE-A201 Service Manual page 9

4) Transmission sequence flow
LINE ESTABLISHED
YES
FULL DUPLEX ?
DCD OFF ?
DSR ON ?
FULL DUPLEX ?
DCD ON ?
CTS ON ?
NO
TXRDY ?
SEND 1 CHARACTER
YES MORE TO
SEND ?
YES
FULL DUPLEX ?
WAIT 100ms
RTS OFF
LINE ESTABLISHED
NO
YES
RTS ON
YES
YES
YES
YES
YES
NO
YES
TIME OUT ?
5 sec
NO
YES
TIME OUT ?
30 sec
NO
TIME OUT ?
YES
FULL
YES
DUPLEX ?
RTS OFF
LINE ESTABLISHED
– 8 –
XE-A201UC
7 sec (Programmable)
DTR OFF
RTS OFF
TRANSMIT ERROR