Kenwood KDC-MP2028 Service Manual page 6

KDC-MP2028/MP228/MP3029
KDC-MP4029/MP4029G
MICROCOMPUTER'S TERMINAL DESCRIPTION
Active
Pin No. Pin Name
(H/L)
36 L BU DET
37 NC
38 PS2-2
39 PS2-1
40 PS1-1
41 PS1-2
42 PS1-3
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
61 NC
62 L PON FL
63 KEY REQ
64 NC
65 REMOTE
66 LX REQ S
67 VSS0
68 VDD1
69 X2
70 X1
6
I/O Application
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
-
O VFD power supply ON
I Communication request from VFD driver
-
I Remote control input
I Communication request from slave unit
-
-
-
-
Processing Operation
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
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)
VFD ON : H, VFD OFF : L
TDF DET H (DSI blinks) : L, TDF DET L : H
L : Key input