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20
Pin No.
Pin Name
I/O
Description
110
ARPRD
O
Read data output to the RF signal decoder (IC622)
111
ARPCS
O
Chip select signal output to the RF signal decoder (IC622) “L”: active
112
XRAMOE
O
Data enable signal output to the S-RAM (IC609) and ROM (IC632)
113
XRAMWE
O
Data write enable signal output to the S-RAM (IC609)
114
SDPRST
O
Reset signal output to the servo digital signal processor (IC607) “L”: reset
115
SDPINT
I
Interrupt signal input from the servo digital signal processor (IC607)
116
SDPWR
O
Data write strobe signal output to the servo digital signal processor (IC607)
117
SDPRD
O
Data read strobe signal output to the servo digital signal processor (IC607)
118
SDPCS
O
Chip select signal output to the servo digital signal processor (IC607) “L”: active
119
NC
—
Not used (open)
120
VDD
—
Power supply terminal (+3.3V)
121, 122
GND
—
Ground terminal
123
NC
—
Not used (open)
124
RAMUB
O
Upper byte write enable signal output to the S-RAM (IC609)
125
RAMLB
O
Low byte write enable signal output to the S-RAM (IC609)
126 to 133
HD7 to HD0
I/O
Two-way data bus with the system controller (IC605), S-RAM (IC609), RF signal decoder
(IC622), and ROM (IC632)
(IC622), and ROM (IC632)
134
GND
—
Ground terminal
135
CPUCK
I
Clock signal input from the system controller (IC605)
136
GND
—
Ground terminal
137
HDAK1IN
I
Not used (fixed at “H”)
138
HDAK0IN
I
Not used (fixed at “H”)
139
HDRQ1OUT
O
Not used (open)
140
HDRQ0OUT
O
Not used (open)
141
CS1
I
Chip select signal output to the system controller (IC605) “L”: active
142
CS4
I
Chip select signal output to the system controller (IC605) “L”: active
143
LWR
I
Write strobe 1 signal output to the system controller (IC605)
144
HWR
I
Write strobe 0 signal output to the system controller (IC605)
145
HRD
I
Read strobe signal output to the system controller (IC605)
146 to 154
I
Address signal output to the system controller (IC605)
155
XINT3
O
Interrupt signal 3 output to the system controller (IC605)
156
XINT1
O
Interrupt signal 1 output to the system controller (IC605)
157
WAIT
O
Wait signal output to the system controller (IC605)
158
NC
—
Not used (open)
159, 160
GND
—
Ground terminal
HA19 to HA18,
HA5 to HA0
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