Interface; Usb Interface - Epson Stylus Pro 7400 Service Manual

EPSON Stylus Pro 7400/7800/9400/9800

1.6 Interface

1.6.1 USB interface

SPECIFICATION
Standard
Universal Serial Bus Specifications Revision 2.0
Universal Serial Bus Specifications Revision 1.1
Universal Serial Bus Device Class Definition for Printing Devices Version
1.1
Bit rate
480 Mbp (High Speed Mode)
12 Mbp (Full Speed Device)
Data format: NRZI
Adaptable connector: USB Series B
Acceptable cable length: 5m
Device ID
<xx><xx> (Character strings may vary by Model Name.)
MFG:EPSON;
CMD:ESCPL2,BDC;
MDL:<Model Name>;
CLS:PRINTER;
DES:EPSON<SP><Model Name>; (<SP>: space code)
Product Description
SIGNAL ASSIGNMENT AND SIGNAL DEFINITION OF INPUT CONNECTOR PIN
Table 1-66. Signal Assignment and Signal Definition of
Input Connector Pin (USB (FS))
Pin No. Signal name
1 VCC
2 –Data Bi-directional
3 +Data Bi-directional
4 Ground
Figure 1-41. Pin Assignment
Interface
In/Out Function description
--- Cable power. Maximum power consumption is
100mA
Data
Data, pull up to +3.3V via 1.5K ohm resistor
--- Cable ground
Revision B
139