Interface Specifications; Specifications And Pin Assignments - Epson FX-870 User Manual

Interface Specifications

Your printer is equipped with an 8-bit parallel interface.

Specifications and pin assignments

The built-in parallel interface has the following characteristics:
Data
format:
Synchronization:
Handshake thing: BUSY and ACKNLG signals
Signal level:
Connector:
The table below provides the connector pin assignments and
describes their respective interface signals.
Signal Return Signal
Pin Pin
1 STROBE IN
19
2 20 DATA 1 IN
3 21 DATA 2 IN
4
22
5 DATA4 IN
23
DATA5 IN
6 24
7
25
8
26
9 27
IO 28 ACKNLG OUT
S-bit parallel
STROBE pulse
TTL-compatible
36-pin 57-30360 Amphenol connector or
equivalent
Direction Description
DATA3 IN
DATA6 IN
DATA 7 IN
DATA8 IN
STROBE pulse to read data. Pulse width
must be more than 0.5 microseconds at
the receiving terminal.
These signals represent information of the
1 st to 8th bits of parallel data,
respectively.
Each signal is at HIGH level when data is
logical 1 and LOW when it is logical 0.
About a 12-microsecond pulse. LOW
indicates that data has been received and
that the printer is ready to accept more
data.
Technical Specifications 7-11