Specifications

REV.-A
1.3 INTERFACE OVERVIEW
The printer has a parallel interface with the specifications described below.
1.3.1 Parallel Interface
Specifications for the 8-bit parallel interface are as follows:
Data format
Synchronization
Handshaking
Signal level
Adaptable connector
Data transmission timing
BUSY
ACKNLG
DATA
STROBE
8-bit parallel
STROBE signal
BUSY and
ACKNLG signal
TTL-compatible
57-30360 (Amphenol) or equivalent
See Figure 1-6.
{ ~;
o.5/is o.5Lls
0.5/S
5/S
5/.fs
min.
min.
min.
typ.
typ. ‘
Figure 1-6. Data Transmission Timing
Table 1-11 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-11. Connector Pin Assignments and Signal Functions
Pin No.
Signal Name
Return
Pin No.
Dir. Functional Description
1
STROBE
19
IN
STROBE pulse to read the input data. Pulse width must
be more than 0.5ps. Input data is latched at falling
edge of this signal.
2 DATA 1 20
IN Parallel input data to the printer.
3
DATA 2
21
IN
HIGH level means data 1.
4 DATA 3 22
IN LOW level means data O.
5 DATA 4 23
IN
6 DATA 5 24
IN
7
DATA 6 25 IN
8
DATA 7 26
IN
9
DATA 8
27
IN
10
ACKNLG
28 OUT
This pulse indicates data has been received and the
printer is ready to accept more data. Pulse width is
approximately 11
Ks.
11 BUSY
29 OUT
HIGH indicates the printer cannot accept more data.
12 PE 30
OUT
HIGH indicates paper out. This signal is effective only
when the ERROR signal is LOW.
13
SLCT
—
OUT
Always HIGH output. (Pulled up to +5
Vthrough a 3.3K
ohm resistor.)
1-14