Sony SCD-XA777ES Service Manual page 81

Pin No. Pin Name
170 XTA1
171 VDD
172 to 176 D0 to D4
I/O
I
System clock input terminal (33.8688 MHz)
—
Power supply terminal (+3.3V) (digital system)
I/O
Two-way data bus with the CPU (IC901) and I/O expander (IC902)
Description
SCD-XA777ES
81