Microcomputer's Terminal Description - Kenwood KCA-R71FM Service Manual

KCA-R71FM

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER : LC72366-9B63 (FM MODULATOR UNIT : IC501)
Pin No. Pin Name
1 XIN
2 TEST2
3~5 PG3~1
6 PG0
7 PF3
8 PF2
9 PF1
10 PF0
11 SI2
12 SO2
13 SCK2
14 PE0
15 PD3
16 PD2
17 PD1
18 PD0
19~26 PC3~PB0
27 PA3
28~30 PA2~0
31 VDD
32 PQ0
33~44 PP3~PN0
45 PM3
46~52 PM2~PL0
53 PK3
54 PK2
55 PK1
56 INT0
57~60 PJ3~0
61~66 PI1~PH0
67 HOLD
68 SNS
69 LCTR
70 HCTR
71 EO3
72 SUBPD
73 VDD
74 AMIN
75 FMIN
4
I/O Terminal name
I X IN X_tal
- GND Ground connection terminal
O NC Not used (pull down to GND lines.)
I GND Connected to GND lines.
O NC Not used (open)
I REQC CD-Changer REQC (Active "Low")
O REQH CD-Changer REQH (Active "Low")
O CHCON CD-Changer ON
I CH_DATA_C CD-Changer DATA in
O CH_DATA_H CD-Changer DATA out
O CH_CLK CD-Changer DATA SCK (Active "Low")
O NC Not used (open)
O LCD DATA out LCD Driver DATA out
O LCD CLK LCD Driver CLK out
O LCD RESET LCD Driver RESET out
O LCD CE LCD Driver CE out
O NC Not used (open)
I LCD DATA in LCD Driver DATA in
I NC Not used (pull down to GND lines.)
- Vdd 5V
O NC Not used (open)
O GAIN12~1 Modulation output switching
O SEP-ATT When it has GAIN5 output, "Hi" output
O NC Not used (open)
O RELAY Antenna relay control output terminal
O P-on P_ON
O MUTE Mute output terminal for the Tuner frequency change
I REMOCON Remote controller signal input
O NC Not used (open)
I NC Not used (pull down to GND lines.)
I HOLD ACC detection (Operation in HOLD "Low")
I Vdd Vdd
I NC Not used (pull down to GND lines.)
I NC Not used (pull down to GND lines.)
O NC Not used (open)
O NC Not used (open)
- Vdd Vdd
I NC Not used (pull down to GND lines.)
I VCO in VCO input
Description Operation in HOLD
-
-
L
-
L
-
H
L
-
L
H
L
L
L
L
L
L
-
-
-
L
L
L
L
L
L
L
L
-
L
-
-
-
Hi-Z
Hi-Z
-
-
-