Parallel Interface (Reverse Channel) - Epson SEIJ98006 Service Manual

EPSON Stylus Color 900

1.3.2 Parallel Interface (Reverse Channel)

Transmission mode: IEEE-1284 nibble mode


Adaptable connector: See the forward channel.


Synchronization: Refer to the IEEE-1284 specification


Handshaking: Refer to the IEEE-1284 specification


Data trans. timing: Refer to the IEEE-1284 specification


Signal level: IEEE-1284 level 1 device
(See forward channel.)


Extensibility request:
The printer responds affirmatively when the extensibility request
values are 00H or 04H,as follows;
00H:Request Nibble Mode Reverse Channel Transfer.
04H:Request device ID using Nibble Mode Rev Channel
Transfer.


Device ID:
The printer sends following device ID string upon request.
When IEEE1284.4 is enabled;
[00H] [60H]
MFG:EPSON;
CMD:ESCPL2,PRPXL,BDC,D4;
MDL:Stylus[SP]COLOR[SP]900;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]COLOR[SP]900;
Product Description
When IEEE1284.4 is disabled;
[00H] [5DH]
MFG:EPSON;
CMD:ESCPL2,PRPXL,BDC;
MDL:Stylus[SP]COLOR[SP[900;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]COLOR[SP]900;
NOTES:
1. [00H] denotes a hexadecimal value of zero.
2. MDL value and DES value depend on the EEPROM setting.
3. CMD value depends on the IEEE1284.4 setting.
See Table 1-13 which shows pin assignment for reverse channel
Interface
Revision C
26