Microcomputer's Terminal Description - Kenwood KDC-5019 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

IC1(ELECTRIC UNIT : X25-939X-XX, X25-8762-7X)
Pin No. Pin Name I/O
1 AM+B O AM+B control
2 FM+B O FM+B control
AFS
3 O Noise detection time constant switching terminal
4 PLL-DATA I/O Data input/output with F/E
5 PLL-CLK I/O Clock output to F/E
6 EVDD - Positive power supply connection terminal
7 EVSS - Ground connection terminal
8 N.C. O
9 BEEP O BEEP sound output
10 REMO I Data input from the remote control light sensor
PRE-MUTE L
11 O Pre-out mute control (L)
PRE-MUTE R
12 O Pre-out mute control (R)
IC2-SDA
13 I/O Data line with IC2,CD mechanism MI-COM.
IC2-CLK
14 O Clock line with IC2,CD mechanism MI-COM.
15,16 N.C. O
Data output to D/A converter(V-LED model)
17 DA-SDA / DIM-CON O
/ Dimmer control output
18 TEST - Test terminal
P-MUTE
19 O Power IC mute control output
20 P-STBY O Power IC standby control output
21 MUTE O IC2 mute control output
22,23 N.C. O
ACC-DET
24 I ACC detection terminal
DIMMER
25 I Small lights detection input
SW5V
26 O SW 5V control output
27 EXT-AMP-CONT O External amp. control output
28 P-CON O Power control output
29 ANT-CON O Antenna control output
30 P-ON O SW 14V control output
RESET
31 I Reset input terminal
32 XT1 I Sub clock resonator connection terminal
33 XT2 - Sub clock resonator connection terminal
Capacitor conection terminal for regulator inside
34 REGC -
microprocessor
35 X2 - Main clock resonator connection terminal
36 X1 I Main clock resonator connection terminal
37 VSS - Ground connection terminal
38 VDD - Positive power supply connection terminal
39 CLKOUT O Internal system clock output
40,41 N.C. O
42 TYPE0 I Destination type selection terminal 0
43 TYPE1 I Destination type selection terminal 1
44 TYPE2 I Destination type selection terminal 2
45 N.C. O
46 IC2 TYPE0 I IC2 setting terminal
47 IC2 TYPE1 I IC2 setting terminal
48 CH-REQH O Request output to changers
KDC-5019/519/7021/7021Y/8020/B7021
Description Processing Operation
Hi: During AM reception
Hi: During FM reception, Hi: During FM reception
if with RDS, RDBS
Hi: During FM reception, Lo: During FM seek or
AF search
Connected to BU 5V lines.
Connected to GND lines.
Not used(N.C.)
When M MUTE L input is Lo during CD source
selected, PRE MUTE L outputs Lo.
When M MUTE R input is Lo during CD source
selected, PRE MUTE R outputs Lo.
Not used(N.C.)
Data line with D/A converter
/ Hi: Dimmer OFF, Pulse wave shape: Dimmer ON
Not used(Connected to GND lines)
Lo: Mute (during POWER OFF, ALL OFF, TEL
MUTE)
Lo: Power IC OFF, Hi: Power IC ON, ALL OFF
mode
OPEN(Hi): Mute ON, Lo: Mute OFF
Not used(N.C.)
Lo: ACC ON, Hi: ACC OFF
Lo: During vehicle small lamps turn on.
Lo: POWER ON mode
Bass boost OFF__Hi: 160msec, Lo: 40msec
Bass boost LOW__Hi: 130msec, Lo: 70msec
Bass boost HI__ Hi: 100msec, Lo: 100msec
Lo: POWER OFF mode, Hi: POWER ON mode
Hi: During TUNER mode or TI reception
Hi: POWER ON mode
Lo: System reset
Clock count during POWER OFF mode
Oscillation: POWER ON mode, Oscillation stop:
POWER OFF mode or momentary power down
detected
Connected to GND lines.
Connected to BU 5V lines.
Not used(N.C.)
Not used(N.C.)
Not used(N.C.)
Lo: Initial value
Lo: Initial value
Lo: Request
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