14
CDC-X237/X437
Pin No.
Pin Name
I/O
Pin Description
42
RMUTE
O
Right channel mute signal output General-purpose input/output pin 8
43
XVDD
—
Crystal oscillator power supply pin
44
XOUT
O
Connections for a 16.9344 MHz crystal oscillator element pin
45
XIN
I
46
XVSS
—
Crystal oscillator ground pin Must be connected to 0 V.
47
SBSY
O
Subcode clock synchronization signal output Not used. (Open)
48
EFLG
O
C1, C2, signal and double error correction monitor pin Not used. (Open)
49
PW
O
Subcode P, Q, R, S, T, U and W output Not used. (Open)
50
SFSY
O
Subcode frame synchronization signal output
This signal falls when the subcode are in standby stase. Not used. (Open)
51
SBCK
I
Subcode readout clock input
This is a schmitt input. (Must be connected to 0 V when unused.)
52
FSX
O
Output pin for the 7.35 kHz synchronization signal divided from the crystal oscillator
Not used. (Open)
53
WRQ
O
Subcode Q output standby output
54
RWC
I
Read/write control signal input This is a schmitt input
55
SQOUT
O
Subcode Q signal output
56
COIN
I
Command input pin from system control microprocessor
57
CQCK
I
Input for both the command input acquisition clock and the SQOUT pin subcode
readout clock input pin This is a schmitt input.
58
RES
I
Reset signal input This pin must be set low briefly after power is first applied.
59
TST11
O
Test output pin Leave open. (Normally output a low level.) Not used. (Open)
60
16M
O
16.9344 MHz output pin Not used. (Open)
61
4.2M
O
4.2336 MHz output pin
62
TEST5
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
63
CS
I
Chip select signal input
A pull-down resister is built-in. Must be connected to 0 V if not controlled.
64
TEST1
I
Test input pin No pull-down resister. Must be connected to 0 V.
