Sony SCD-XB940, Руководство по обслуживанию

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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)
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