Sony HCD-GRX50 Service Manual page 49

Pin No. Pin Name
70 XIN
71 VSS
72 XOUT
73 RESET
74 CH
75 BUSY
76 TEST
77 GRAD R1
78 I2C DATA
79 I2C CLK
80 GRAD R2
I/O
I System clock input terminal (12.5 MHz)
—
Ground terminal
O
System clock output terminal (12.5 MHz)
System reset signal input from the reset signal generator (IC502) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
O
Not used (open)
I Not used (fixed at "L")
I
Connected to ground
O
Not used (open)
I/O
Communication data bus with the system controller (IC501)
Communication data reading clock signal input or transfer clock signal output with the system
I/O
controller (IC501)
O
Not used (open)
Function
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