Parallel Interface (Reverse Channel); Serial Interface - Epson FX-980 Service Manual

FX-980

1.4.3.2 Parallel Interface (Reverse Channel)

Transmission mode: 8 bit parallel, IEEE-1284 nibble mode


Synchronization: Refer to the IEEE-1284 specification


Handshaking: Refer to the IEEE-1284 specification


Signal level: IEEE-1284 level 1 device


Data transmission timing: Refer to the IEEE-1284 specification


Device ID:
[00H][4DH]
MFG: EPSON;
CMD: ESCPL2,PRPXL24,BDC;
MDL: FX-980;
CLS: PRINTER;
DES: EPSON[SP]FX-980;


Pin assignment: The pin assignment (reverse channel) is
the same as for the FX-2170 except for
the functions of the pins below:
Pin No.
18 <FX-980> This line is pulled up to +5 V through 3.9 k
35 <FX-980> This line is pulled up to +5 V through 1.0 k
Product Description
Function
resistor.
resistor.
Firmware Specifications

1.4.3.3 Serial Interface

Synchronization: Asychronous


Signal level: EIA-233D


Word length: Start bit:
Data bit:
Parity biy: Odd, Even, Non, Ignore
Stop bit:


Baud rate: 2400, 4800, 9600, or 19200 bps


Handshaking: DTR signal and XON/SOFF


Error handling: When a parity error is detected, the
received byte is changed to a "*"
character code. Overrun error and
framing error are ignored.


Connector: 25 pin subminiature D-shell connector
(female)


Connecotr pin assgnment and signals:
See Table 1-13 on the following page.
Revision A
MARK (logical 1): -3 V to -25V
SPAC:E (logical 0): +3 V to +25V
1 bit
8 bit
1 bit or more
21