Kenwood CKDC-395 Service Manual page 5

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MICROCOMPUTER'S TERMINAL DESCRIPTION
3 7 63 1515 0
Active
Pin No. Pin Name
(H/L)
26 AUD SCL
27 H PWIC STBY
28 H VOL MUTE
29 L PWIC MUTE
30 TUN FANC OUT
31 RESET2
32 NC
33 VSS1
34 NC
35 L ACC DET
36 L BU DET
37 NC
38 PS2-2
39 PS2-1
40 PS1-1
41 PS1-2
42 PS1-3
TE
L 13942296513
43,44 NC
45 CD MUTE
46 L CD MSTOP
47 CD LOE LIM SW
48 CD LOEJ
49 CD MOTOR
50 NC
51 L CD MRST
52 CD SCL
53 CD DISC12 SW
54 CD LOS SW
55 CD SDA
56 OEM DISP CE
57 OEM DISP CLK
58 OEM DISP DATA I/O
59 DSI
60 L RESET
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61 NC
62 L PON FL
.
63 KEY REQ
64 NC
I/O Application
I/O Volume + tuner I2C clock input and output
O Power IC standby output
O E-VOL mute output
O Power IC mute output
Tuner block (inside the µ-com) check
O
O Mute for reset
-
-
-
I ACC detection
I Momentary power-down detection
-
O Power supply control output
O Power supply control output
O Power supply control output
O Power supply control output
O Power supply control output
-
I CD mute request
O CD mecha u-com stop
I CD detection (chucking switch)
I/O CD motor control
O CD motor control
-
CD mecha µ-com reset
O
I/O CD mecha I2C clock output
I 12cm CD detection
I CD loading detection
I/O CD mecha I2C data input and output
I/O External display chip enable
I/O External display clock
External display chip data
O DSI control
I
-
x ao u163
y
O VFD power supply ON
i
I Communication request from VFD driver
-
CKDC-395/395A/495
2 9
8
Power IC ON : H, Power IC OFF : L
L : Mute OFF, Hi-Z : Mute ON
Power OFF : L, Standby : L, Tel mute : L
OK : L, NG : H
Output L
ACC exists : L, ACC does not exist : H
BU exists : L
BU does not exist (Momentary power-down) : H
Refer to "POWER IC CONTROL" on the TRUTH TABLE
Refer to "POWER IC CONTROL" on the TRUTH TABLE
Refer to "POWER IC CONTROL" on the TRUTH TABLE
Refer to "POWER IC CONTROL" on the TRUTH TABLE
Refer to "POWER IC CONTROL" on the TRUTH TABLE
Q Q
3 6 7 1 3 1 5
L : Mute request
H : mecha µ-com operates, L : mecha µ-com is stopped
H : Loading is finished, L : Disc does not exist
Refer to "CD MECHA CONTROL OPERATION"
on the TRUTH TABLE
Refer to "CD MECHA CONTROL OPERATION"
on the TRUTH TABLE
H : Normal condition, L : Reset
External display
External display
External display
DSI ON : H, DSI OFF : L, TDF DET=H (DSI blinks)
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VFD ON : H, VFD OFF : L
TDF DET H (DSI blinks) : L, TDF DET L : H
.
L : Key input
9 4 2 8
Processing Operation
0 5 8 2 9 9 4 2 8
m
9 9
9 9
5