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6.2 Interface Specifications
Parallel
(1) Specifications
Data input: 8 bits parallel (Centronics)
Handshake:
STROBE , BUSY, and ACK
(2) Connector signal description
Pin no. Signal I/O Function
1 STROBE Input Data strobe
2 to 9
DATA
0 to 7
Input
Carries the input data 1 when high and 0
when low
10 ACK Output Signal showing that data is received
11 BUSY Output Signal showing that data cannot be received
12 PE Output Signal showing that there is no paper
13 SLCT Output Signal showing that the printer is ONLINE
14 LFAUTO・ Input
When this signal is low at power-on, one line
feed is performed at carriage return
15 N.C. No connection
16 GND Ground
17 FG Frame Ground
18 N.C. No connection
19 to 30 GND Twist, pair, and ground for return signal
31 INIT Input Initialize
32 ERROR Output Signal showing that there is an error
33 GND Ground
34 N.C. No connection
35 and 36 +5V Normally, pulled up at 4.7k at high
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