Interfaces; Printer Interface - Epson STYLUS Scan 2500 Service Manual

EPSON Stylus Scan 2500

1.5 Interfaces

This section is divided into printer and scanner interface specifications. See
the following section for printer interface details or see "Scanner interfaces"
on pag e22 for scanner interface details.

1.5.1 Printer Interface

PARALLEL
BUSY signal is set high before setting either -ERROR low or PE high, and held
high until all these signals return to their inactive state.
BUSY signal is at high level in the following cases:
During data entry (see data transmission timing)
T
When input data buffer is full
T
During -INIT signal is at low level or during hardware initialization
T
During printer error (see -ERROR signal)
T
When the parallel interface is not selected
T
ERROR signal is at low level when the printer is in one of the following states:
Printer hardware error (fatal error)
T
Paper-out error
T
Paper-jam error
T
Ink-out error
T
PE signal is at high level during paper-out error.
1. Specification
Transmission mode 8 bit parallel, IEEE-1284 compatibility/nibble mode
Synchronization Refer to the IEEE-1284 specification
Handshaking Refer to the IEEE-1284 specification
Product Description
Packet
Signal level
Data trans. timing
2. Connector pin assignment and signals
Refer to the IEEE-1284 specification
3. Data transmission timing
Refer to the IEEE-1284 specification
4. Extensibility Request:
The printer responds affirmatively when the extensibility request values
are 00H or 04H, which mean
00H Request nibble mode reverse channel transfer
T
04H Request Device ID;
T
Return data using nibble mode reverse channel transfer
Device ID:
The printer sends the following device ID string when requested.
IEEE 1284.4 is enabled,
[00H][5EH]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,SPC;
MDL:Stylus[SP]Scan[SP]2500;
CLS:PRINTER
DES:EPSON[SP]Stylus[SP]Scan[SP]2500;
Note: (1)[00H] denotes a hexadecimal value of zero
(2)MDL value depends on the EEPROM setting.
Interfaces
Refer to the IEEE-1284 Standard for Data Delivery
and Logical Channels for IEEE Std. 1284.4 Interface
(Draft D1.50)
Refer to the IEEE-1284 specification
TTL compatible level (IEEE-1284 Level 1 device)
Refer to the IEEE-1284 specification
Revision A
19