Kenwood KRC-508S, Service Manual

KRC-508S/688

4

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin

Pin Name

Signal Name I/O

Purpose

Operation Description

51

AVdd

-

A/D analog power pin

52

AVref0

-

A/D reference voltage input pin

53

P10/ANI0

PHONE

I

PHONE detection input

<1 V: PHONE. >
2.5 V: Navigation muting.

54

P11/ANI1

NC

I

Not used

55

P12/ANI2

NOISE

I

FM noise detection input

56

P13/ANI3

S-METER

I

FM S-meter input

57

P14/ANI4

NC

I

Not used

58

P15/ANI5

NC

I

Not used

59

P16/ANI6

REEL_S

I

C-mechanism supply reel detection

60

P17/ANI7

REEL_T

I

C-mechanism take-up reel detection

61

AVss

-

A/D and D/A GND pin

62

P130/ANO0

NC

O Not used

63

P131/ANO1

NC

O Not used

64

AVref1

-

D/A reference voltage input pin

65

P70/RxD2/SI2

CH_DATAC

I

Data input from CD-CH

66

P71/TxD2/SO2

CH-DATAH

O Data output to CD-CH

67

P72/ASCK2/SCK2 CH_CLK

I/O CD-CH clock input/output

68

P20/RxD1/SI1

LCD_DATAL

I

Data input to LCD driver

69

P21/TxD1/SO1

LCD_DATAS

O Data output from LCD driver

70

P22/ASCK1/SCK1 LCD_CLK

O Clock output to LCD driver

71

P23/PCL

NC

O Not used

72

P24/BUZ

BEEP

O Beep output

73

P25/SI0

NC

O Not used

74

P26/SO0

PNL_DET1

I

Panel detection

75

P27/SCK0

NC

O Not used

76

P80/A0

LCD_INH

O Reset output to LCD driver

77

P81/A1

LCD_CE

O CE output to LCD driver

78

P82/A2

SRT_SW1

I

SRT position detection input

79

P83/A3

SRT_SW2

I

SRT position detection input

80

P84/A4

NC

O Not used

81

P85/A5

NC

O Not used

82

P86/A6

NC

O Not used

83

P87/A7

C-MSC

O EQ amp FF/PLAY control

PLAY:HI  OFF:LO

84

P40/AD0

C-F/R

O Tape transport direction switching

FWD:LO  REV:HI

85

P41/AD1

C-MUTE

O Tape muting control

MUTE:HI

86

P42/AD2

C-MS_IN

I

Inter-music pulse detection

87

P43/AD3

C-MTL

O MTL ON/OFF control

ON:HI  OFF:LO

88

P44/AD4

C-NR

O Dolby ON/OFF control

ON:HI  OFF:LO

89

P45/AD5

NC

O Not used

90

P46/AD6

NC

O Not used

91

P47/AD7

RDS_DATA

I

Data input from RDS decoder

92

P50/A8

RDS_QUAL

I

Quality input from RDS decoder

93

P51/A9

AFC

O PLL high-speed lock-up pin

During reception: Hi. 
During search: Lo.

94

P52/A10

FM/AM_SD

I

FM/AM SD input

Station detected: Hi.

95

P53/A11

IF_COUNT

I

Not used

96

P54/A12

NC

O Not used

97

P55/A13

AM+B

O AM power control

ON:HI

98

P56/A14

FM+B

O FM power control

ON:HI

99

P57/A15

NC

O Not used

100

Vss

-

GND pin

784217AGF503(504)(IC1 : MAIN UNIT)

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9

9

2

8

9

4

2

9

8

TEL 13942296513

9

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

Q

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