Usb Interface - Epson Stylus Color C70 Service Manual

EPSON Stylus COLOR C70/C80
Extensibility Request:
The printer responds affirmatively when the extensibility request values are 00H or
04H, that mean,
00H: Request Nibble Mode Reverse Channel Transfer.
04H: Request Device ID;
Return Data Using Nibble Mode Rev Channel Transfer.
Device ID:
The printer sends the following device ID string when it is requested.
When IEEE1284.4 is enabled,
[00H] [4EH]
MFG: EPSON;
CMD: ESCPL2, BDC, D4;
MDL: STYLUS[SP]COLOR[SP]C70/C80;
CLS: PRINTER;
DES: EPSON[SP]STYLUS[SP]COLOR[SP]C70/C80;
When IEEE1284.4 is disabled,
[00H] [4BH]
MFG: EPSON;
CMD: ESCPL2, BDC;
MDL: STYLUS[SP]COLOR[SP]C70/C80;
CLS: PRINTER;
DES: EPSON[SP]STYLUS[SP]COLOR[SP]C70/C80;
PRODUCT DESCRIPTION

1.3.3 USB Interface

Standard:
Bit Rate:
Data Encoding:
Adaptable Connector:
Recommended Cable Length:
Table 1-10. Connector Pin Assignment and Signals
Pin No. Signal Name
1 VCC
2 -Data
3 +Data
4 Ground
Figure 1-4. USB Pin Assignment
INTERFACE
Based on
"Universal Serial Bus Specifications Revision 1.0"
"Universal Serial Bus Device Class Definition
for Printing Devices Version 1.0"
12 M bps (Full Speed Device)
NRZI
USB Series B
2 meters
I/O Function Description
- Cable power. Max. power consumption is 2mA
Bi-Directional Data
Bi-Directional Data, pull up to +3.3 V via 1.5K ohm resistor
- Cable ground
Pin #2 Pin #1
Pin #3 Pin #4
Revision A
18