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