Epson C8230 User Manual

5. 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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