Usb Interface - Epson Stylus PHOTO 1270 Service Manual

EPSON Stylus PHOTO 870/1270

1.3.3 USB Interface

"
Standard: Based on:
"Universal Serial Bus Specifications Rev. 1.0"
"Universal Serial Bus Device Class Definition
for Printing Devices Version 1.0"
"
Bit rate: 12Mbps (Full Speed Device)
"
Data encoding: NRZI
"
Adaptable connector: USB Series B
"
Recommended cable length:2 meters
Table 1-15. Connector Pin Assignment and Signals
Pin No. Signal Name
1 VCC
2 -Data Bi-D
3 +Data Bi-D
4 Ground
Pin #2
Pin #3
Figure 1-8. USB Pin Assignment
PRODUCT DESCRIPTIONS
I/O Function Description
Cable power. Max. power
-
consumption is 2mA.
Data
Data, pulled up to +3.3 V via
1.5K ohm resistor.
- Cable ground
Pin #1
Pin #4
Interface
Revision B
26