Microcomputer's Terminal Description - Kenwood KDC-CPS89 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

GIC1 (SUB-CIRCUIT UNIT: X13-9930-00)
Pin No. Pin Name I/O
1 - 3 O
4 AVSS -
5 O
6 REQH1 O
7 AVREF1 I
8 DATAC1 I
9 DATAH1 O
10 HCLK1 I/O Communication clock input/output with CH1
11 DATAH0 I
12 DATAC0 O
13 HCLK0 I/O Communication clock input/output with H/U
14 REQC0 O
15 REQH2 O
16 DATAC2 I
17 DATAH2 O
18 HCLK2 I/O communication clock input/output with CH2
19 CHCON01 O
20 CHCON02 O
21 RELAY1 O
22 RELAY2 O
23-32 O
33 VSS -
34-59 O
60 RESET I
61 REQC2 I
62 BUDET I
63 AUX SW I
64 REQH0 I
65 REQC1 I
66 CHCON1 I
67 COMMSW I
68 VDD -
69 X2 -
70 X1 I
71 IC -
72 O
73 CHCON2 I
74 AVDD -
75 AVREF0 I
76 O
77 AUX TYPE O
78-80 O
Description
A/D, D/A converter ground connection terminal
Communication request output to CH1
D/A converter reference voltage input
Data input from CH1
Data output to CH1
Data input from H/U
Data output to H/U
Communication request output to H/U
Communication request output to CH2
Data input from CH2
Data output to CH2
Control output to CH1
Control output to CH2
Relay1 Control output
Relay2 Control output
Ground connection terminal
System reset
Communication request input from CH2
Momentary power down detection input
AUX SW input
Communication request input form H/U
Communication request input form CH1
Changer control mode input from H/U
5-line communication old/new switch input
Positive power supply connection terminal
Main clock resonator connection terminal 2
Main clock resonator connection terminal 1
IC Internal connection terminal
Changer control mode input from H/U
A/D converter positive power supply connection terminal
A/D converter reference voltage input
KDC-CX87/CPS87
Processing Operation
Not used(N.C.)
Not used(N.C.)
"Lo" : Communication requested
"Lo" : Communication requested
"Lo" : Communication requested
"Hi" : CH1 operation mode
"Hi" : CH2 operation mode
"Hi" : AUX inputs, "Lo" : Changer outputs
"Hi" : CH2 outputs, "Lo" : CH1 outputs
Not used(N.C.)
Connected to GND lines.
Not used(N.C.)
"Lo" : System reset
"Lo" : Communication requested
"Hi" : When momentary power down detected or BU OFF
"Lo" : BU ON
"Hi" : Auxiliary input mode
"Lo" : Communication requested
"Lo" : Communication requested
"Lo" : CH1 mode
"Hi" : New communication, "Lo" : Old communication
Connected to BU 5V lines.
Connected to GND lines.
Not used(N.C.)
"Lo" : CH2 mode
Connected to BU 5V lines.
Connected to BU 5V lines.
Not used(N.C.)
Not used(pull down to GND lines.)
Not used(N.C.)
5