Pin

Source

Compatibility

Mode

Nibble Mode

Byte Mode

28

GND

GND

GND

29

GND

GND

GND

30

GND

GND

GND

31

Host

Init

Init

Init

32

Printer

Fault

DataAvail/Data0,4

DataAvail

33

GND

ND

ND

34

Printer

DK_STATUS

ND

ND

35

Printer

+5V

ND

ND

36

Host

SelectIn

1284-Active

1284-Active

NC: None Connect

ND: Not Defined

 

A signal name with a rule above it indicates an “L” active signal.

 

Bidirectional communications cannot take place, unless all signal names for both sides

CAUTION

correspond to each other.

 

Connect all signal lines using a twisted-pair cable. Connect the return side to the signal

 

ground level.

 

Make sure the signals satisfy electrical characteristics.

 

Set the leading edge and trailing edge times to 0.5ms or less.

 

Do not ignore

 

or BUSY signals during a data transfer. Ignoring such signals may

 

Ack

 

result in data corruption.

 

Make the interface cables as short as possible.

 

 

 

 

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Image 70
Epson T70 specifications Pin Source Compatibility Mode Nibble Mode Byte Mode, Dkstatus