Sony CD Walkman D-EJ011, Service Manual

15

D-EJ011

5-6. IC PIN FUNCTION DESCRIPTION

Pin No.

Pin name

I/O

Description

• IC801   BU1377KS2 (SYSTEM CONTROLLER)

1 to 18

SEG0 to SEG17

O

LCD segment output

19

SEL_CHG

I

Not used (fixed at “L”)

20

SEL_CEX

I

Destination select (fixed at “L”)

21

CHARGE_CTL

O

Not used (OPEN)

22

XLINEOUT_MUTE

O

LINE OUT muting output (OPEN)

23

EE_SDA/REM_SDA

I/O

EEPROM data

24

EE_SCL

O

EEPROM clock

25

PLL_CE

O

Not used (OPEN)

26

PLL_CLK

O

Not used (OPEN)

27

PLL_DATA

O

Not used (OPEN)

28

KEYSCAN6

O

Not used (OPEN)

29

KEYSCAN5

O

Key matrix detect output

30

KEYSCAN4

O

Key matrix detect output

31

KEYSCAN1

I

Key matrix detect input

32

KEYSCAN2

I

Key matrix detect input

33

GND

–

Ground terminal

34

KEYSCAN3

I

Key matrix detect input

35

PLL_RST

O

Not used (OPEN)

36

ST_DET

O

Not used (OPEN)

37

MO/ST

O

Not used (OPEN)

38

XLINE_DET

I/O

LINE OUT sensing status detection input (OPEN)

39

SUBSYQ

I

Sub code sync interuption input

40

HOLD

I

HOLD switch status detection input

41

OPEN/CLOSE

I

OPEN switch status detection input

42

INNER

O

Not used (OPEN)

43

K_PLAY

I

PLAY KEY input

44

K_TUNER

O

Not used (OPEN)

45

BEEP

O

Not used (OPEN)

46

K_STOP

I

STOP KEY input

47

DIN OUT

I/O

Command output , DSP status input, subcode Q input

48

MCK

O

Serial interface clock output

49

RW

O

DSP’s serial interface Read/Write signal output

50

BUSY

I

DSP’s auto sequencer status

51

DQM

O

SDRAM initialize output

52

VDD

–

Power supply for CPU and I/O

53

XXRESET

O

System reset output

54

CD_CTL

O

Not used (OPEN)

55

TU_CTL

O

Not used (OPEN)

56

XHP_MUTE

O

Headphone IC mute ON/OFF control output

57

XRESET

I

Micon reset terminal

58

TEST0

I

Connect to GND

59

XIN75

I

Not used (fixed at “L”)

60

XOUT75

O

Not used (OPEN)

61

GND

–

Ground terminal

62

XIN4M

I

4MHz clock input

63

XOUT4M

O

4MHz clock output (OPEN)