Kenwood KVT-715DVD Service Manual page 14

KVT-715DVD,725DVD/-B,735DVD
KVT-745DVD,765DVD,815DVD
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MICROCOMPUTER'S TERMINAL DESCRIPTION
3 7 63 1515 0
Pin No.
TV_MDATA TV_MDATA
43
TV_MDATA FLASH_SO
TV_CLK TV_CLK
44
TV_CLK FLASH_CLK
45 SYS_ON
46 SYS_MDATA
47 SYS_SDATA
48 SYS_MCLK
49 PWIC_STBY
50 NC
51 PWIC_SVR
52 PWIC_MUTE
53 NC
54 ILLUMI_DET
55,56 NC
57 BU_DET
58,59 NC
60 PORTVDD1
TE
L 13942296513
61 PWIC_BEEP
62 P_ON
SCL COR_SCL
63
SCL IC5_SCL
SDA COR_SDA
64
SDA IC5_SDA
65 ES_DSP_SW
66 BUS_MUTE
67 MZ_ILL_ON
68 MZ_SYSON
69 MZ_SYSOFF
70 XT2
71 XT1
72 GND2
73 X1
74 X2
75~80 NC
81 SYS_MUTE
82,83 NC
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84 TUN_SDA
85 NC
.
86 TUN_SCL
87,88 NC
14
Name I/O
O DATA for TV unit
O Use for flash ROM program writing
O Clock for TV unit
I Use for flash ROM program writing
I Control for power on/off from main microprocessor (H : Hide-way unit on, L : Off)
I Data from main microprocessor
O Data for main microprocessor
I Clock from main microprocessor
O Audio power IC stand-by control (H : Power on, L : Power off)
O NC
O SVR discharge control (H : Discharge )
O Audio power IC muting control (L : Muting on or all off)
O NC
I Illumination detect terminal (L : Illumination on)
O NC
I Backup line voltage detect terminal (H : Reduced voltage less than 8.8V)
O NC
- VDD (BU5V)
O Beep audio output terminal
O Control for AVR (SW5V H : on)
I/O Clock for EEPROM (ROM correction)
I/O IIC bus clock (for IC5)
I/O Data for EEPROM(ROM correction)
I/O IIC bus data (for IC5)
O Select for audio system E's or DSP (H : DSP, L : E's)
O Bus muting (H : Muting)
O MZ-Bus illumination control (H : Illumination on)
O MZ-Bus system on control (L : Bus on)
O MZ-Bus system off control (L : Bus off)
- NC
NC
- GND
Main clock (18.874MHz)
- Main clock (18.874MHz)
O NC
I Muting control from Main unit microprocessor (L : Request for muting)
O NC
I/O Front-end I2C data input/output terminal
x ao
y
O NC
i
I/O Front-end I2C clock output terminal (Max 400kHz)
O NC
8
Description / Processing Operation
Q Q
3 6 7 1 3
u163
.
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9