Microcomputer's Terminal Description; System Μ-Com: Ic2 On X32- (Processor Unit) - Kenwood KCA-BT100 Service Manual

Ref. No. Application / Function
Q3 Changer CONT
Q5 BU DET
Q6 BU5V AVR
Q7,8 Analog SW CONT
Q9,10 A8V AVR
Q11 Analog SW CONT
Q12 SW14V
Q13 Audio GND SW
Q15 LX-BUS Mute Buffer
Q16 BU5V AVR

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM µ-COM: IC2 on X32- (PROCESSOR UNIT)
Pin No. Pin Name I/O
1~3 NC -
4 AVSS -
5 P130 -
6 REQH1 O
7 AVREF1 -
8 DATAC1 I
9 DATAH1 O
10 HCLK1 I/O
11 DATAH0 I
12 DATAC0 O
13 HCLK0 I/O
14 REQC0 O
15 REQH2 O
16 DATAC2 I
17 DATAH2 O
18 HCLK2 I/O
19 CHCONO1 O
20 CHCONO2 O
21 NC -
22 RELAY2 O
23~32 NC -
33 VSS1 -
34~59 NC -
COMPONENTS DESCRIPTION
Vc=L: Head unit is used, Vc=H: Head unit is not used
BU ON: Vc=L, BU OFF: Vc=H
Q16's Vb=H: 5V ON
Controls switching of IC11 and Q13
IC2's pin22=H: Changer audio signal, IC2's pin22=L: Hands-free audio signal
Q9's Vb=H: 8V ON
Controls switching of IC11 and Q13
IC2's pin22=H: Changer audio signal, IC2's pin22=L: Hands-free audio signal
IC3's pin21=H: 14V ON
Changer or Hands-free GND select SW
IC2's pin22=H: Changer GND, IC2's pin22=L: Hands-free GND
IC3's pin25=L: Vc=H, IC3's pin25=H: Vc=L
Q16's Vb=H: 5V ON
Application
Not used
A/D reference GND
GND
Communication request to CH1
D/A reference voltage input
Data input from CH1
Data output to CH1
Clock output to CH1
Data input from head unit
Data output to head unit
Clock input from head unit
Communication request to head unit
Communication request to CH2
Data input from CH2
Data output to CH2
CH2 clock output
CH1 control output
CH2 control output
Not used
Relay control
Not used
GND
Not used
KCA-BT100
Operation / Condition / Compatibility
Processing / Operation / Description
L: Communication request is found
L: Communication request is found
L: Communication request is found
H: CH1 control request
H: CH2 control request
H: CH2, L: CH1
3