Stylus C40UX/C40SX/C20UX/C20SX

Revision A

1.4 INTERFACE

Interface specification for each model are as the following. Parallel Interface :EPSON Stylus C40SX .EPSON Stylus C20SX USB Interface :EPSON Stylus C40UX .EPSON Stylus C20UX

*This printer interface as standard.

1.4.1 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

 

 

 

: 12Mbps (Full Speed Device)

 

Data encording

 

 

 

: NRZI

 

Adaptable connector

: USB Series B

 

Recommended cable length

: 2 meters

Connect er pin assinment and signals:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin No.

 

Signal name

In/Out

 

 

 

Function description

 

 

 

 

 

 

 

 

 

 

1

 

VCC

-

 

 

Cable power. Maximum power consumption is

 

 

 

100mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

Data

bi-directional

Data

 

 

 

 

 

 

 

 

 

 

3

 

+Data

bi-directiona

data, pull up to +3.3V via 1.5K ohm resistor

 

 

 

 

 

 

 

 

 

 

4

 

Ground

-

 

 

Cable ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1-3. USB Pin Assignment

1.4.2 Parallel Interface (Forward Channel)

Transmission mode

: 8 bit parallel, IEEE-1284 compatibility mode

Synchronization

: By STROBE pulse

Handshaking

: By BUSY and ACKNLG signal

Signal level

: TTL compatible level

Adaptable connector

: 57-30360(amphenol) or equivalent

 

 

 

 

 

 

BUSY signal is set high before setting either -ERROR

 

 

 

 

 

 

low or PE high and held high until all these signals

 

 

 

 

 

 

return to their inactive state.

 

 

 

 

 

 

BUSY signal is at high level in the following cases.

 

 

 

 

 

 

 

 

-During data entry (see Data transmission timing)

 

 

 

 

 

 

 

 

-When input data buffer is full

 

 

 

 

 

 

 

 

-During -INIT signal is at low level or during

 

 

 

 

 

 

 

 

 

hardware initialization

 

 

 

 

 

 

 

 

-During printer error (See -ERROR signal)

 

 

 

 

 

 

ERROR signal is at low level when the printer is in one

 

 

 

 

 

 

of the following states.

 

 

 

 

 

 

 

 

-Printer hardware error (fatal error)

 

 

 

 

 

 

 

 

-Paper-out error

 

 

 

 

 

 

 

 

-Paper-jam error

 

 

 

 

 

 

 

 

-Ink-out error

 

 

 

 

 

 

 

 

-Ink overflow error

 

 

 

 

 

 

PE signal is at high level during paper-out error.

Data transmission timing :

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DATA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-STROBE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUSY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-ACKNLG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRODUCT DESCRIPTION

INTERFACE

13

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Epson C40UX service manual USB Interface, Parallel Interface Forward Channel, Signal name In/Out Function description