Control Signal Sequence - Sharp XE-A201 Service Manual

XE-A201UC
CHAPTER 6. CONTROL SIGNAL SEQUENCE
1. ONLINE TRANSMISSION
1) Half duplex transmission
DCE DTE
SD
RD DATA
RTS
CTS
DSR
DCD
DTR
2) Full duplex transmission
DCE DTE
SD
RD DATA
RTS
CTS
DSR
DCD
DTR
DATA
< 100ms
DATA
< 100ms
– 7 –
3) Line connection sequence flow
STARTED BY P.C
INITIAL
DTR ON
DSR ON ?
NO
FULL DUPLEX ?
RTS ON
LINE ESTABLISHED
NO
YES
YES