Usb Interface - Epson LX-300+II RTP Service Manual

EPSON LX-300+II/300+II RTP/1170II

1.3.4 USB interface


Standard : based on
•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 encoding : NRZI

Adaptable connector : USB Series B

Recommended cable length : 2 meters
Table 1-19. Connector Pin Assignment and Signals
Pin No. Signal name In/Out
1 VCC – Cable power. Maximum power consumption is 100mA
2 -Data Bi-directional Data
3 +Data Bi-directional Data, pull up to +3.3V via 1.5K ohm resistor
4 Ground – Cable ground
Figure 1-7. USB Interface Connector Pin Assignment

Respond to an BULK OUT transaction with NAK handshake and other transaction
with ACK under either of the following conditions:

In the condition of the paper-out error

In the condition of the release lever error

Respond to an BULK OUT transaction with NAK and BULK IN transaction with
NAK under any of the following conditions:

In the condition of being input buffer full
PRODUCT DESCRIPTION
Function description
Interface Specifications

During hardware initialization

In the self test mode

In the adjustment mode

In the default-setting mode

Respond to an BULK OUT transaction with STALL and BULK IN transaction
with STALL under the following condition:

In the condition of the printer hardware error (fatal error)

USB Device Requests for USB Printer as shown below

GET PORT STATUS
Reply specification for GET PORT STATUS as shown below:
Table 1-20. GET PORT STATUS
Bit Field
7, 6 Reserved
5 Paper Empty
4 Select
3 Not Error
2, 1, 0 Reserved

GET DEVICE ID
Device ID : The printer sends following device ID string when it is requested.
Table 1-21. GET DEVICE ID
LX-300+II
[00H][4EH]
MFG:EPSON;
When IEEE1284.4 CMD:ESCP9,PRPII9,BDC,D4;
is enabled, MDL:LX-300+;
CLS:PRINTER;
DES:EPSON[SP]LX-300+;
[00H][4BH]
MFG:EPSON;
When IEEE1284.4 CMD:ESCP9,PRPII9,BDC;
is disabled, MDL:LX-300+;
CLS:PRINTER;
DES:EPSON[SP]LX-300+;

SOFT RESET
This USB Device Request is used when Host initializes printer's input buffer.
Revision D
Description
Reserved
0: Paper Not Empty / 1: Paper Empty
0: Not Select / 1: Select
0: Error / 1: No Error
Reserved
LX-1170II
[00H][4EH]
MFG:EPSON;
CMD:ESCP9,PRPII9,BDC,D4;
MDL:LX-1170;
CLS:PRINTER;
DES:EPSON[SP]LX-1170;
[00H][4BH]
MFG:EPSON;
CMD:ESCP9,PRPII9,BDC;
MDL:LX-1170;
CLS:PRINTER;
DES:EPSON[SP]LX-1170;
22