EPSON Stylus PHOTO 810/820/830

Revision B

1.3 INTERFACE

The EPSON Stylus PHOTO 810/820/830 provides USB and parallel interface as standard.

1.3.1 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)

„When the parallel interface is not selected

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

„No ink-cartridge

„Maintenance request

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

DATA

 

 

 

data byte n

 

 

 

 

 

data byte n+1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

thold

 

 

 

 

 

 

 

 

 

-STROBE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tstb

 

 

tnext

 

 

 

tsetup

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUSY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tready

 

 

 

 

tbusy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-ACKNLG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

treply

tack

tnbusy

 

 

 

 

 

Figure 1-8. Data transmission timing
Table 1-10. Data transmission timing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Minimum

 

 

 

Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tsetup

 

 

500ns

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

thold

 

 

500ns

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tstb

 

 

500ns

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tready

0

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tbusy

-

 

 

 

 

 

500ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tt-out*

-

 

 

 

 

 

120ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tt-in**

-

 

 

 

 

 

200ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

treply

0

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tack

 

 

500ns

 

 

 

 

10us

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tnbusy

0

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tnext

0

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Rise and fall time of every output signals

**Rise and fall time of every input signals

***Typical timing of tack is shown on the following page.

PRODUCT DESCRIPTION

INTERFACE

17