Epson 4000 User Manual
Interface Specifications
Your printer is equipped with an 8-bit parallel interface. For
specifications on optional interfaces, refer to their manuals.
Pin Assignments for the Parallel Interface
Connector pin assignments and a description of their respective
interface signals are shown in the following table.
Signal Return
Pin
Pin
Signal
Direction Description
1
19
STROBE IN
STROBE pulse to read data. Pulse
width must be more than 0.5
microseconds at the receiving terminal.
2
20
DATA 1
IN
These signals represent information of
3
21
DATA 2
IN
the 1 st to 8th bits of parallel data,
4
22
DATA 3
IN
respectively. Each signal is at HIGH
5
23
DATA 4 IN
level when data is logical 1 and LOW
6
24
DATA 5
IN
when it is logical 0.
7
25
DATA 6 IN
8
26
DATA 7
IN
9
27
DATA 8
IN
10 28
ACKNLG
OUT
About an 11 -microsecond pulse. LOW
indicates that data has been received
and that the printer is ready to accept
more data.
more data.
11 29
BUSY
OUT
A HIGH signal indicates that the printer
cannot receive data. The signal goes
HIGH in the following cases:
1) During data entry (ea. char. time)
2) During printing
3) When off line
12 30 PE
4) During printer-error state
OUT
A HIGH signal indicates that the printer
is out of paper.
Technical Specifications
8-9