Epson C82305 User Manual download pdf (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-ON<ll>H-data

entry is enabled

X-0FF<13>H-data

entry is disabled

Data transmitted by

the change of the

impedance between

pin No. 17 and pin

No. 24 is controlled a

follows;

X-ON<ll>H-data

entry is enabled

X-OFF<13>H-data

entry is disabled

Control Loop

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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Epson C82305 User Manual Page 21