Epson C82305 - Manual (Page 21)

5. Handshaking
Table 8. Handshaking
Using DTR protocol
Using X-ON/X-OFF
protocol
US-232D
The two signal The impedance
conditions at pm No. between pin No. 17
11 and pin No. 20 are and pin No. 24 is as
as follows; follows;
MARK-data entry is LOW(MARK)-data
disabled entry is disabled
SPACE-data entry is High(SPACE)-data
enabled entry is enabled
Data transmitted from
pin No. 2 is controller
as follows;
X - O N < l l > H - d a t a
entry is enabled
X - 0 F F < 1 3 > H - d a t a
entry is disabled
Data transmitted by
the change of the
impedance between
pin No. 17 and pin
No. 24 is controlled a
follows;
X - O N < l l > H - d a t a
entry is enabled
X-OFF<13>H-data
entry is disabled
Control Loop
s
The DTR signal is always set to SPACE while X-on/
X-off handshaking is selected.
X-on/X-off characters will not be transmitted from TXD
while DTR handshaking is selected (TXD signal is
always set to MARK).
Note
Operation is not guaranteed when using the current loop
mode at rates over 1,200 BPS.
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