Hardware Description - Epson C82303/09 (Parallel I/F User Manual

For signal description and pin assignment, refer to the table
below:
Table 5. Signal description and pin assignment
I
Signal
Pin Pin
19
20
21
22
23
24
25
26
27
12 30
-
13

HARDWARE DESCRIPTION

I
Signal
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
BUSY
SLCT
STROBE pulse to read data. Pulse
IN
width
seconds at the receiving
These signals represent information
I N
of the 1st to 8th bits of parallel data,
I N
respectively. Each signal is at
I N
HIGH level when data is logical 1
I N
and LOW when it is logical 0.
I N
IN
IN
I N
About a IO-microsecond pulse.
OUT
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.
A HIGH signal indicates that the
OUT
interface board cannot receive data.
The signal goes HIGH in the
following cases:
1) During data entry (ea. car. time)
2) When off line
3) During printer-error state
A HIGH signal indicates that the
OUT
printer is out of paper.
Pulled up to +5 V through 3.3k ohm
OUT
resistance.
12
Description
be more than 0.5 micro-
must
terminal.