5
KDC-237SA/237SAY
KDC-237SG/237SGY
Pin No.
Pin Name
I/O
Application
Truth Value
Processing Operation Description
Table
24
PON FL
O
Key illumination power supply control
ON: H, OFF: L
25
NC
-
Not used
26
PON PANEL
I/O
Panel 5V control
ON: L, Momentary power down/Panel detached
: Hi-Z, 11 minutes after ACC OFF: Hi-Z
27
NC
-
Not used
Output L fixed
28
PWIC BEEP
O
Beep output
29
AUD SCL
I/O
E-VOL clock output
30
AUD SDA
I/O
E-VOL data input/output
31
VFD SYS DATA
O
VFD data output
32
VFD PAN DATA
I
VFD data input
33
VFD CLK
O
VFD clock output
125kHz
34
VFD BLK
O
VFD data blanking output
H: Reset cancelled, L: Reset, Momentary power down
/Panel detached: L, 11 minutes after ACC OFF: L
35
CD SI
O
CD mechanism serial output
36
CD SO
I
CD mechanism serial input
37
CD CLK
O
Serial clock output
1MHz
38
CD LOS SW
I
CD loading detection
39
PIO0
I
Communication request from mechanism DSP
H: Data request
40
CD SRAMSTB
O
1M-bit SRAM standby
H: SRAM standby
41
EPM
I
Flash EPM input
Connects to VSS
42
CD LOE LIM SW
I
CD detection (Chucking SW)
H: Loading completed, L: No disc
43
PON CD
O
CD mechanism power supply control
H: Power ON
44
CD LOEJ
I/O
CD motor control
q
Refer to the truth value table
45
CD MOTOR
I/O
CD motor control
q
Refer to the truth value table
46
VFD CE
O
VFD control request
47
CD DRIVEMUTE
O
Motor driver mute output
48
CD CCE
O
CD mechanism chip enable
49
CD DISC8 SW
I
8cm disc detection
Pull-up (B.U.)
50
CD MRST
O
CD mechanism
µ
-com reset
H: Normal, L: Reset
51~53
NC
-
Not used
Output L fixed
54
CD MUTE
I
CD mute request
L: Mute request
55
CD DISC12 SW
I
12cm disc detection
Pull-up (B.U.)
56
ROTARY CCW
I
VOL key input
Detects pulse width
57
ROTARY CW
I
VOL key input
Detects pulse width
58
NC
-
Not used
Output L fixed
59
DSI
I/O
DSI control
OFF: Hi-z, Panel detached: Pulse drives, ON: H
60
RDS DATA
I
RDS decoder data input
61
RDS QUAL
I
RDS decoder QUAL input
62
VCC2
-
MICROCOMPUTER’S TERMINAL DESCRIPTION
