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Parallel Interface
A 25-pin D-subminiature connector is used for the parallel interface.
Pin Assignment
The pin assignment for the parallel interface is outlined in Figure 12 and Table 7.
Table 7: Pin Assignment
Pin
Signal
1
1
GND
2
D1
3
D2
1
4
GND
5
D5
6
D6
1
7
GND
8
BUSY
9
ERROR
1
10
GND
11
/SOP
12
R/W
1
13
GND
14
D0
1
15
GND
16
D3
17
D4
1
18
GND
Figure 12: Pin Assignment
shield
data line 1
data line 2
shield
data line 5
data line 6
shield
busy output:
low = idle
high = operation in progress (switching)
error output:
low = normal
high = error in error queue
shield
start of packet--provides a start-and-stop mechanism
read/write--driven by master read and write cycles
shield
data line 0 input; least significant bit (LSB)
shield
data line 3
data line 4
shield
Description
Operating and Maintenance Instructions – 21
(table continued)
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