Kenwood KDC-MP819 Service Manual page 7

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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Pin No. Pin Name
28 ACC DET
29 SW5V
30 MUTE
31 O CE
32 O CLK
33 O DATA
34 RESET
35 XT1
36 XT2
37 REGC
38 X2
39 X1
40 VSS
41 VDD
42 CLKOUT
43 NC
44 E2PDET
45 PRE MUTE L
46 PRE MUTE R
TE
L 13942296513
47 DSP DATA
48 DSP LATCH
49 DSP CLK
50 AFS
51 AM+B
52 FM+B
53 R QUAL
54 R DATA
55 IC2TYPE0
56 IC2TYPE1
57 P ON
58 BVDD
59 BVSS
60 TYPE0
61 TYPE1
62 TYPE2
63 TYPE3
64 AUX SW
65 ILL ON
66 MOSW
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67 LO/EJ
68 M STOP
69 M RST
.
70 CH CON
71 CH RST
72 CH REQH
73 AVCONT
I/O Description
I ACC detection terminal
I/O SW5V control terminal
I/O MUTE output
I/O External display CE terminal
I/O External display clock terminal
I/O External display data terminal
I Reset input
I Sub clock resonator connection terminal
- Sub clock resonator connection terminal
Capacitor connection terminal for regulator inside
-
microprocessor
- Main clock resonator connection terminal
I Main clock resonator connection terminal
- Ground connection terminal
- Positive power supply connection terminal
O Internal system clock output
O
I EEPROM detection input
O Pre-out muting L Ch. control output
O Pre-out muting R Ch. control output
O Data output to DSP IC
O Latch output to DSP IC
O Clock output to DSP IC
O Noise detection time constant switching terminal
I/O AM+B control
I/O FM+B control
I Quality input from the RDS decoder IC
I Data input from the RDS decoder IC
I IC2 setting terminal
I IC2 setting terminal
I/O SW 14V control output
- Positive power supply connection terminal
- Ground connection terminal
I Destination type selection terminal 0
I Destination type selection terminal 1
I Destination type selection terminal 2
I Destination type selection terminal 3
O CD/AUX input switching output
I/O FL/Illumination AVR ON/OFF control output
O CD mechanism loading motor control output
I/O CD mechanism loading/Eject switching output
x ao
O Stop request to CD mechanism MI-COM.
y
O Reset output to CD mechanism MI-COM.
i
O Changer control
O Reset output to changers
O Request output to changers
O A/D converter reference voltage control output
KDC-MP819/X659/Z838
8
Lo: ACC ON, Hi: ACC OFF
Lo: SW5V ON, Hi-Z: SW5V OFF
Lo: Muting OFF, Hi-Z: Muting ON
Lo: System reset , Hi: Normal operation
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.)
Lo: No EEPROM, Hi: With EEPROM
Lo: When M MUTE L input is Lo during CD source
selected or Momentary power down detected, Hi:
Fix in the case of 2 zone mode
Lo: When M MUTE R input is Lo during CD source
selected or Momentary power down detected, Hi:
Q Q
3 6 7 1 3
Fix in the case of 2 zone mode
Not used(N.C.)
Not used(N.C.)
Not used(N.C.)
Lo: During FM seek or AF search, Hi: During FM
reception, Hi: During last FM mode with RDS/
RDBS model
Hi: During AM reception
Hi: During FM reception, Hi: During last FM mode
with RDS/RDBS model
Except RDS, RBDS model: Not used(pull down to
GND lines)
Except RDS, RBDS model: Not used(pull down to
GND lines)
Lo: Initial value(default)
Lo: Initial value(default)
Hi-Z: POWER OFF mode, Hi: POWER ON mode
Connected to BU 5V lines.
Connected to GND lines.
Lo: Except AUX input, Hi: AUX input
Hi-Z: AVR OFF, Hi: AVR ON
Hi: CD loading/eject action or Break, Lo: Other
Lo: Loading, Hi: Eject, Hi-Z: Stop or Break
u163
Lo: Stop mode, Hi: Operation mode
Lo: Reset
.
Lo: Standby mode, Hi: Operation mode
Lo: Request
Hi: Active, Connected to AVREF terminal
2 9 9 4 2 8
Processing Operation
1 5 0 5 8 2 9 9 4
m
co
: Reset
9 9
2 8 9 9
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