Interface; Usb Interface - Epson Stylus PHoto 875DC Service Manual

EPSON Stylus PHOTO 875DC

1.3 Interface

1.3.1 USB Interface

SPECIFICATIONS
"
Standard: Based on the following:
!
Universal Serial Bus Specifications Revision 1.0
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Universal Serial Bus Device Class Definition for Printing
Devices Version 1.0 (Printer part)
!
Universal Serial Bus Mass Storage Class CBI Transport
Specification v1.0 (Storage part)
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Bit rate: 12Mbps (Full Speed Device)
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Data encoding: NRZI
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Adaptable connector: USB Series B
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Recommended cable length: 2 meters
CONNECTOR PIN ASSIGNMENT
Table 1-1. Connector Pin Assignment and Signals
Pin No. Signal Name
1 VCC
2 -Data
3 +Data
4 Ground
PRODUCT DESCRIPTIONS
I/O Function Description
Cable power. Max. power
-
consumption is 2mA.
Bi-D Data
Data, pull up to +3.3 V via 1.5K
Bi-D
ohm resistor.
- Cable ground
Figure 1-3. USB Pin Assignment
DEVICE ID
The printer sends the following device ID string when it is requested.
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When IEEE1284.4 is enabled,
<00H><5EH>
MFG:EPSON;
CMD:ESCPL2,BDC,D4;
MDL:Stylus<SP>Photo<SP>875DC;
CLS:PRINTER;
DES:EPSON<SP>Stylus<SP>Photo<SP>875DC;
"
When IEEE1284.4 is disabled,
<00H><5AH>
MFG:EPSON;
CMD:ESCPL2,BDC;
MDL:Stylus<SP>Photo<SP>875DC;
CLS:PRINTER;
DES:EPSON<SP>Stylus<SP>Photo<SP>875DC;
NOTE: [00H] denotes a hexadecimal value of zero.
Interface
Pin #2 Pin #1
Pin #3 Pin #4
Revision A
13