AR-155 (serv.man13). AR150 155 ARF151 Service Manual-Electrical Section - Sharp Copying Equipment Service Manual (repair manual). Page 23

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C. LCD panel pin arrangement
Pin No.
Signal name
Input/Output
Remark
1
LCDRS
Input
H: Data input;
L: Instruction input
2
LCDRW
Input
H: Data read;
L: Data write
3
LCDE
Input
Enable signal
4
DB0
Input
Not used.
5
DB1
Input
Not used
6
DB2
Input
Not used
7
DB3
Input
Not used
8
LCDB4
Input
Data bus line
9
LCDB5
Input
Data bus line
10
LCDB6
Input
Data bus line
11
LCDB7
Input
Data bus line
12
V
SS
0V
13
V
DD
+5.2V
14
Vin
+5.2V
15
V5
LCD drive power
16
GND
Frame GND
D. Key scan input process diagram
LCD display data
process time (B)
Key scan
process
time (A)
Key scan
process
time (A)
Key SW effective period 
input
AR-F151
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