Sony SCD-XB940, Service Manual

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Pin No. Pin Name I/O Description
50 ZDFLGR O Data (Rch) flag detect signal output terminal
51, 52 A0, A1 O Address signal output to the D-RAM (IC625)
53 VDD — Power supply terminal (+3.3V)
54 VSS — Ground terminal
55 to 63 A2 to A10 O
Address signal output to the D-RAM (IC625)
64 NC —
Not used (open)
65 VSS —
Ground terminal
66 XWE O
Write enable signal output to the D-RAM (IC625)
67 XCAS O
Column address strobe signal output to the D-RAM (IC625)
68 XRAS O
Row address strobe signal output to the D-RAM (IC625)
69 XOE O
Read enable signal output to the D-RAM (IC625)
70 to77 DQ0 to DR7 I/O
Two-way data bus with the D-RAM (IC625)
78 VDD —
Power supply terminal (+3.3V)
79 VSS —
Ground terminal
80 WCK I
Clock signal input terminal for disk mark detect
81 WRFD I
RF data signal input terminal for disk mark detect
82 to 89 WAD0 to WAD7 I
A/D data signal input from the A/D converter (IC620) for disk mark detect
90 VSS —
Ground terminal
91 to 98 SD7 to SD0 I
Stream data signal input from the RF signal decoder (IC622)
99 SDEF I
Error flag signal input from the RF signal decoder (IC622)
100 XSAK I
Data flag signal input from the RF signal decoder (IC622)
SCD-XB940