Kenwood KDC-HD942U Service Manual page 7

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
75 PWIC STBY O
76 LX REQ M O
77 LX MUTE I
78 LX CON O
79 LX RST O
80 MUTE PRE O
81 MUTE PRE SW O
82-86 NC -
87 HR P.CON O
88 HR MUTE I
89 HR BU DET O
90-93 NC -
94 AVSS -
95 NC -
96 VREF -
97 AVCC -
98 LX DATA S I
99 LX DATA M O
100 LX CLK I/O LX-BUS clock
Truth value table
q CD motor control
CD MOTOR (Pin 47)
Standby
Eject
Load
Brake
● HD μ-COM: IC851 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O
1 IBOC BLEND I
2,3 NC -
4 TOOL 1 O
5 TOOL 0 I/O Debug
6 RESET I
7,8 NC -
9 FLMD 0 I
Application
Power IC standby
Communication request to slave unit
Mute request from slave unit
Start-up request to slave unit
Forced reset to slave unit
External preout mute
External preout mute sub
Not used
P.CON control for HD μ-com
Mute request from HD μ-com
Back-up detection for HD μ-com
Not used
Not used
Data from slave unit
Data to slave unit
CD LOEJ (Pin 46)
L L
H H
H L
H Hi-z
Application
IBOC BLEND signal input
Not used
Debug
Reset
Not used
Debug
KDC-HD942U
Truth Value
Processing / Operation / Description
Table
POWER ON: H, POWER OFF: L
H: Mute ON, L: Mute OFF
H: Slave unit ON, L: Slave unit OFF
H: Reset, L: Normal
0-bit or momentary power-down: L,
L: Mute ON
0-bit or momentary power-down: L,
L: Mute ON
Output L fi xed
H: ON (same timing as LX-P.CON)
H: Mute cancelled, L: Mute
L: Back-up found (L fi xed)
Output L fi xed
Output L fi xed
Truth Value
Processing / Operation / Description
Table
L: Analog, H: Digital
Output L fi xed
Output L fi xed
Output L fi xed
L: Reset
General-purpose input setting
Built-in pull-down
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