Pioneer AVIC-505 Service Manual page 68

AVIC-505
Pin No. Pin Name
121 GND
122-131 A21-12
132 VDD
133 GND
134,135 A11,10
136 VDD
137 GND
138-145 A9-2
146 VDD
147 GND
148 VDD
149 GND
150 A1
we
151
oe
152
ras
153
uucas
154
ulcas
155
lucas
156
llcas
157
158,159 D0,1
160 VDD
*GGC1289(UPD705101GM-100)
41
21
80
40
*PD4844B
61
21
120
40
68
I/O Function and Operation
GND
O Address bus
Power supply
GND
O Address bus
Power supply
GND
O Address bus
Power supply
GND
Power supply
GND
O Address bus
O DRAM write strobe
O DRAM read strobe
O Row address strobe/Chip select
O Column address strobe (most significant byte)
O Column address strobe (many significant byte)
O Column address strobe (little significant byte)
O Column address strobe (least significant byte)
I/O Data bus
Power supply
160
80
121
61
240
80
181
61
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.