Kenwood CKDC-MP576 Service Manual page 5

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
18 CN DET I Panel communication detection
19 NC - Not used
20 KEY REQ I Communication request form VFD driver
21 PON FL O Key illumi power supply control
22 DSI I/O DSI control
23 PON PANEL I/O Panel 5V control
24~27 NC - Not used
28 PWIC BEEP O Beep output
29 CD SCL I/O CD mechanism I2C clock output
30 CD SDA I/O CD mechanism I2C data input/output
31 VFD SYS DATA O VFD data output
32 VFD PAN DATA I VFDINT/data input
33 VFD CL O VFD clock output
34 VFD INH O VFD data blanking output
35 AUD SDA I/O IC10 I2C data input/output
36 AUD SCL I/O IC10 I2C clock input/output
37 CD MUTE I CD MUTE request
CD mechanism µ-com stop
38 CD MSTOP O
39 CD LOE LIM SW I CD detection (chucking SW)
40 CD LOEJ I/O CD motor control
41 EPM I FLASH EPM input
42 CD MOTOR O CD motor control
43 CD DISC8 SW I CD disc detection (8cm)
CD mechanism µ-com RST
44 CD MRST O
45 CD DISC12 SW I CD disc detection (12cm)
46 VFD CE O VFD control request
47 CD LOS SW I CD loading detection
48,49 NC - Not used
50 ROTARY CW I VOL key input
51 NC - Not used
52 ROTARY CCW I VOL key input
53~56 NC - Not used
57 RDS AFS L O TUN RDS MUTE output
For IC10 adjustment +
58 TUN ADJ I
E2PROM write request
59 TUN SD I TUN search stop input
Truth Value
Application
Table
w
w
CKDC-MP576
CKDC-MP676F/MP676V
Processing / Operation / Description
H: Without PANEL, L: With PANEL
Fix to output L
Connect to INT
ON: H, OFF: L
OFF: Hi-z PANEL detached, Pulse drive ON: H
ON: L, Momentary power down, when PANEL detached,
11 minutes after ACC OFF: Hi-z
Fix to output L
Data output
INT/data input
52kHz
H: Cancel reset, L: RESET, L: Momentary power down,
when PANEL detached, 11 minutes after ACC OFF
L: MUTE request
H: Mechanism µ-com in operation, L: Mechanism µ-com stopped
H: Loading completed, L: Disc not found
Refer to the truth value table
L: Can be changed (Only for FLASH). Connect to VSS (pull down)
Refer to the truth value table
H: Normal, L: Reset
Fix to output L
Detect pulse width
Fix to output L
Detect pulse width
Fix to output L
H: Normal
L: FM/AM SEEK, AF search (L: When Tuner SRC Auto Zero)
When ADJ=H, PS1-1,2,3=Hi-z, PS2-1,2=Hi-z,
TUN DATA, CLK=Hi-z, MUTE=L, E2PROM writing-in
H: Station found, L: Station not found
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