Sharp ER-A440 Service Manual page 29
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Also See for ER-A440:
- Instruction manual (130 pages) ,
- Service manual (52 pages) ,
- Programming manual (39 pages)
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5) Receiving sequence flow
LINE ESTABLISHED
DSR ON ?
DCD ON ?
RXRDY ?
READ 1 CHARACTER
EOT ?
ENQ ?
ACK ?
END CODE
NAK ?
BUFFER FULL ?
NO
YES
HALF
NO
DUPLEX ?
YES
NO
YES
YES
YES
NO
YES
YES
YES
YES
LINE ESTABLISHED
NO
NO
TIME OUT ?
30sec
TIME OUT ?
YES
SEND TEXT
YES
LINE ESTABLISHED
AFTER
RECEIVE
ER-OFF
COMMAND
YES
DTR OFF
RTS OFF
NO
DSR OFF
YES
INITIAL
– 13 –
YES
ID. ENQ ∞
NO
ACK or
NAK 4 sec
TEXT 7 sec
NO
DTR OFF
RTS OFF
RECEIVE ERROR
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