Epson C82303* User Manual
HARDWARE DESCRIPTION
For signal description and pin assignment, refer to the table
below:
Table 5. Signal description and pin assignment
I
Signal
Pin
I
Pin
19
Signal
Description
IN
STROBE pulse to read data. Pulse
width
must
be more than 0.5 micro-
seconds at the receiving
terminal.
12
13
20
21
22
23
23
24
25
26
27
30
-
DATA 1
I N
These signals represent information
DATA 2
I N
of the 1st to 8th bits of parallel data,
DATA 3
I N
respectively. Each signal is at
DATA 4
I N
HIGH level when data is logical 1
DATA 5
I N
and LOW when it is logical 0.
DATA 6
IN
DATA 7
IN
DATA 8
I N
OUT
About a IO-microsecond pulse.
LOW indicates that data has been
received and that the interface
LOW indicates that data has been
received and that the interface
board is ready to accept more data.
This signal is output as a pair
together with BUSY.
BUSY
OUT
A HIGH signal indicates that the
interface board cannot receive data.
interface board cannot receive data.
The signal goes HIGH in the
following cases:
SLCT
1) During data entry (ea. car. time)
2) When off line
OUT
OUT
3) During printer-error state
A HIGH signal indicates that the
printer is out of paper.
printer is out of paper.
Pulled up to +5 V through 3.3k ohm
resistance.
resistance.
1 2
1 3