Kenwood KRC-508S, Service Manual

KRC-508S/688

3

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin

Pin Name

Signal Name I/O

Purpose

Operation Description

1

P60/A16

ST_TYPE1

I

E-VOL setting selection input

DEFAULT:LO

2

P61/A17

ST_TYPE2

I

E-VOL setting selection input

DEFAULT:LO

3

P62/A18

JS_TYPE1

I

Genuine/generally-marketed identification

DEFAULT:LO

input.

4

P63/A19

TYPE1

I

Destination type switching input 1

5

P64/RD

TYPE2

I

Destination type switching input 2

6

P65/WR

TYPE3

I

Destination type switching input 3

7

P66/WAIT

NC

O Not used

8

P67/ASTB

NC

O Not used

9

Vdd

-

Positive power supply pin

10

P100/TI5/TO5

AMP_SVR

O Power IC reset control

Power ON: Lo.

11

P101/TI6/TO6

AMP_STBY

O Power IC standby control

Standby canceled: Hi. 
Standby mode: Lo.

12

P102/TI7/TO7

AMP_MUTE

O Power IC muting control

Muting ON: Lo. Muting OFF: Hi.

13

P103/TI8/TO8

NC

O Not used

14

P30/TO0

ACC_DET

I

Acc detection input

ACC OFF:HI  ACC ON:LO

15

P31/TO1

BU_DET

I

B-U detection input

B-U down: Hi. B-U normal: Lo.

16

P32/TO2

SMALL

I

Small input

Dimmer ON: Lo. Dimmer OFF: Hi.

17

P33/TI1

P_CONT

O Power control

ON:HI  OFF:LO

18

P34/TI2

P_ANT

O Power antenna control

TUNER: Hi. Other sources: Lo.

19

P35/TI00

REMO

I

Remote control input

20

P36/TI01

P_ON

O Internal power control

ON:HI  OFF:LO

21

P37

ILL_ON

O LED lighting control output

Lighting ON: Hi. Lighting OFF: Lo.

22

TEST

-

IC test pin

23

P90

IC2_SDA

I/O E-VOL/E's + data input/output

24

P91

IC2_SCK

O E-VOL/E' + clock output

25

P92

MUTE

O Muting control

Muting ON: Hi. Muting OFF: Lo.

26

P93

SW5V

O SW 5 V control

ON:LO  OFF:HI

27

P94

F/E_DATA

I/O IC3 data input/output

28

P95

F/E CLK

O IC 3 clock output

29

P120/RTP0

CH_CON

O CH control

ON:HI

30

P121/RTP1

CH_REQH

O CH send request output

Requested: Lo.

31

P122/RTP2

NC

O Not used

32

P123/RTP3

NC

O Not used

33

P124/RTP4

C-MAIN_M

O C-mechanism main motor control

ON:HI  OFF:LO

34

P125/RTP5

C-SUB_M+

O C-mechanism loading motor control

35

P126/RTP6

C-SUB_M-

O C-mechanism loading motor control

36

P127/RTP7

NC

O Not used

37

Vdd

-

Positive power supply pin

38

X2

-

Main system clock oscillator pin

39

X1

-

Main system clock oscillator pin

40

Vss

-

GND pin

41

XT2

-

Sub-system clock oscillator pin

42

XT1

-

Sub-system clock oscillator pin

43

RESET

I

System reset input pin

44

P00/INTP0

NC

O Not used

45

P01/INTP1

RDS_CLK

I

RDS clock input

46

P02/INTP2/NMI

CH_REQC

I

CD-CH send request input

Requested: Lo.

47

P03/INTP3

LCD_DATAL

I

Data input from LCD driver

48

P04/INTP4

C-MODE_1

I

C-mechanism mode detection 1 input

49

P05/INTP5

C-MODE_2

I

C-mechanism mode detection 1 input

50

P06/INTP6

C-MODE_3

I

C-mechanism mode detection 1 input

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