Sharp ER-A750 Service Manual page 38

Pin Signal
Symbol
No. name
108 WAIT WAIT
109 EXWAIT EXWAIT
110 RA18 Nu
111 RA17 Nu
112 VSS GND
113 RA16 Nu
114 RA15 Nu
115 RDO RDO
116 WRO WRO
117 EXINT3 TRQ2
118 EXINT2 TRQ1
119 EXINT1 EXINT1
120 EXINT0 EXINT0
121 OPTCS OPTCS
122 ROS1 ROS1
123 ROS2 ROS2
124 RAS2 Nu
125 RAS1 Nu
126 RJRST GND
127 RJTMG GND
128 DOT4 Nu
129 DOT3 Nu
130 DOT2 Nu
131 DOT1 Nu
132 VSS GND
133 DOT7 Nu
134 DOT6 Nu
135 DOT5 Nu
136 RJMTS Nu
137 RJMTD Nu
138 DOT9 Nu
139 DOT8 Nu
140 SYNC SYNC
141 ASKRX ASK
142 VCC VCC
143 VSS VSS
144 NU Nu
145 RAS3 RAS3
146 RJMTR GND
147 SLMTD Nu
148 SLMTS Nu
149 SLMTR GND
150 HTS2 Nu
151 SCK2 Nu
152 STH2 VCC
153 NU Nu
154 NU Nu
155 NU Nu
156 NU Nu
157 NU Nu
158 LCDWT LCDWT
In/
Function
Out
Out Wait request signal
External wait control input
In
signal
— Nu
— Nu
— GND
— Nu
— Nu
Expansion RD signal
Out
(Option)
Expansion WR signal
Out
(Option)
Expansion interrupt signal
In
(Option)
Expansion interrupt signal
In
(OPC1)
Expansion interrupt signal
In
(Option)
Expansion interrupt signal
In
(Option)
Chip select base siganal for
Out
expansion option
Out ROM 1 chip select signal
Out ROM 2 chip select signal
— Nu
— Nu
— GND
— GND
— Nu
— Nu
— Nu
— Nu
— GND
— Nu
— Nu
— Nu
— Nu
— Nu
— Nu
— Nu
In
In I/R input from IR unit
— +5V
— GND
— Nu
Out RAM3 chip select signal
— GND
— Nu
— Nu
— GND
— Nu
— Nu
— +5V
— Nu
— Nu
— Nu
— Nu
— Nu
In LCDC wait signal
Pin Signal
Symbol
No. name
159 DOTEN NU
160 RASP RASP
7 – 8
In/
Function
Out
— NU
Standard RAM chip select
Out
signal