Epson DFX-9000 - Usb Interface

Epson DFX-9000 Revision B
Product Description Basic specifications 30
1.2.8.4 USB Interface
Specifications
Universal Serial Bus Specifications Revision 1.1
Universal Serial Bus Device Class Definition for Printing Devices
Version 1.1
Bit rate: 12 Mbps (Full Speed Device)
Data encording: NRZI
Connector: USB Series B
Max. cable length: 2 meters
Connector pin assignment and signals:
Figure 1-20. USB interface connector pin assignment
The USB responds to a BULK OUT transaction with a NAK handshake
and other transactions with ACK under the following conditions:
 In SelecType mode
 During a cover open error
 During a paper jam error
 During a ribbon jam error
 During a ribbon out error
 During a paper-out error
 During an incomplete paper change error
The USB responds to a BULK OUT transaction with NAK and BULK
IN transaction with NAK under the following conditions:
 When the input buffer is full
 During hardware initialization
 In the self test mode
 In the adjustment mode
When there is a printer hardware error (fatal error), the USB responds to
a BULK OUT or BULK IN transaction with STALL.
Table 1-23. Connector pin assignment
Pin
No.
Signal
name
In/Out Function description
1 VCC - This line is for cable power.
Maximum power consumption is
100 mA.
2 –Data Bi-directional This line is for data.
3 +Data Bi-directional This line is for data and is pulled
up to +3.3 V via a 1.5 kΩ resistor.
4 Ground - This line is for cable ground.
Pin #2
Pin #4Pin #3
Pin #1