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Signal pin assignments
In this table, the direction of the signals is given relative to the
scanner.
Signal I/O 50 Pin
No.
25 Pin
No.
Description
GND 1−12
14−25
35−37
39−40
42
7−9
14
16
18
24
Ground
NC 13 Not connected
DB0 I/O 26 8 Data bus 0
DB1 I/O 27 21 Data bus 1
DB2 I/O 28 22 Data bus 2
DB3 I/O 29 10 Data bus 3
DB4 I/O 30 23 Data bus 4
DB5 I/O 31 11 Data bus 5
DB6 I/O 32 12 Data bus 6
DB7 I/O 33 13 Data bus 7
DBP I/O 34 20 Data bus parity
TERMPWR 38 25 Termination power (+5V)
ATN I 41 17 Attention
BSY I/O 43 6 Busy
ACK I 44 5 Acknowledge
RST I 45 4 Reset
MSG O 46 2 Message
SEL I/O 47 19 Select
C/D O 48 15 Control/Data
REQ O 49 1 Request
I/O O 50 3 Input/Output
A-12 Interface Specifications