EPSON Stylus PHOTO 810/820/830

Revision B

Table 1-11. Typical time of tackTable 1-13. Connector pin assignment and signals

Parallel I/F mode

Typical time of tack

 

 

High Speed

0.5us

 

 

Normal Speed

2us

 

 

Table 1-12. Signal level: TTL compatible (IEEE-1284 level 1 device)

Parameter

Minimum

Maximum

Condition

 

 

 

 

VOH*

-

5.5V

 

 

 

 

 

VOL*

-0.5V

-

 

 

 

 

 

IOH*

-

0.32mA

VOH = 2.4V

 

 

 

 

IOL*

-

12mA

VOL = 0.4V

 

 

 

 

CO

-

50pF

 

 

 

 

 

VIH

-

2.0V

 

 

 

 

 

VIL

0.8V

-

 

 

 

 

 

IIH

-

0.32mA

VIH = 2.0V

 

 

 

 

IIL

-

12mA

VIL = 0.8V

 

 

 

 

CI

-

50pF

 

 

 

 

 

*A low logic level on the Logic H signal is 2.0V or less when the printer is powered off and this signal is equal or exceeding 3.0V when the printer is powered on. The receiver shall provide an impedance equivalent to 7.5K ohm to ground.

Pin No.

Signal name

Return

In/Out

Functional description

GND pin

 

 

 

 

 

 

 

 

 

 

 

 

 

The strobe pulse. Read-in of data is

1

-STROBE

19

In

performed at the falling edge of this

 

 

 

 

pulse.

 

 

 

 

 

2

DATA0

20

In

 

 

 

 

 

 

3

DATA1

21

In

 

 

 

 

 

 

4

DATA2

22

In

The DATA0 through DATA7 signals

 

 

 

 

5

DATA3

23

In

represent data bits 0 to 7, respectively.

Each signal is at high level when data is

 

 

 

 

6

DATA4

24

In

logical 1 and low level when data is

7

DATA5

25

In

logical 0.

 

 

 

 

 

 

8

DATA6

26

In

 

 

 

 

 

 

9

DATA7

27

In

 

 

 

 

 

 

10

-ACKNLG

28

Out

This signal is a negative pulse indicating

that the printer can accept data again.

 

 

 

 

 

 

 

 

 

11

BUSY

29

Out

A high signal indicates that the printer

cannot receive data.

 

 

 

 

 

 

 

 

 

12

PE

28

Out

A high signal indicates paper-out error.

 

 

 

 

 

13

SLCT

28

Out

Always at high level when the printer is

powered on.

 

 

 

 

 

 

 

 

 

14

-AFXT

30

In

Not used.

 

 

 

 

 

 

 

 

 

The falling edge of a negative pulse or a

31

-INIT

30

In

low signal on this line causes the printer

to initialize. Minimum 50us pulse is

 

 

 

 

 

 

 

 

necessary.

 

 

 

 

 

32

-ERROR

29

Out

A low signal indicates printer error

condition.

 

 

 

 

 

 

 

 

 

36

-SLIN

30

In

Not used.

 

 

 

 

 

18

Logic H

-

Out

Pulled up to +5V via 3.9 K ohm resistor.

 

 

 

 

 

PRODUCT DESCRIPTION

INTERFACE

18