Sony NW-S4 - Network Walkman, Service Manual

24

NW-S4

•

 MAIN BOARD  IC801  HD6433800A02FP  (CPU)

Pin No.

Pin Name

I/O

Description

1

IRQ1

I

Voltage detect input terminal

2

X1

I

Sub system clock input terminal (32.768kHz)

3

X2

O

Sub system clock output terminal (32.768kHz)

4

VSS

—

Ground terminal

5

OSC2

O

Main system clock output terminal (8MHz)

6

OSC1

I

Main system clock input terminal (8MHz)

7

TEST

I

Test mode signal input terminal    Not used (fixed at “L” )

8

RES

I

System reset signal input from the reset signal generator (IC802)     “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

9

P31

—

Not used (open)

10

P32

O

Power supply (V2) ON/OFF control signal output terminal    “L”: ON

11

P33

O

Interrupt request signal output to the digital signal processor (IC601)

12, 13

P34, P35

—

Not used (fixed at “L” )

14

P36

O

Reset signal output to the digital signal processor (IC601) and EEPROM (IC603)
“L”: reset

15

P37

O

Power supply (VCORE) ON/OFF control signal output terminal    “L”: ON

16

VCC

—

Power supply terminal (+3.2V)

17

V1

—

Power supply terminal for the liquid crystal display (open in this set)

18

V2

—

Power supply terminal for the liquid crystal display (connected to pin 

ql

 (V3))

19

V3

—

Power supply terminal for the liquid crystal display (connected to pin 

qk

 (V2))

20, 21

COM4, COM3

O

Common signal output to the liquid crystal display    Not used (open)

22, 23

COM2, COM1

O

Common signal output to the liquid crystal display (LCD901)

24, 25

SEG25, SEG24

O

Segment signal output to the liquid crystal display    Not used (open)

26 to 40

SEG23 to SEG9

O

Segment signal output to the liquid crystal display (LCD901)

41

WKP7

I

USB connection detect signal input terminal

42

WKP6

I

AVLS switch (S807) input terminal    “L”: NORM

43

WKP5

I

.

 key (S806) input terminal

44

WKP4

I

>

 key (S805) input terminal

45

WKP3

I

Nx

 key (S804) input terminal

46

WKP2

I

SHIFT key (S803) input terminal

47

WKP1

I

VOL - key (S802) input terminal

48

WKP0

I

VOL + key (S801) input terminal

49

P90

O

LCD back light (D803 toD805) ON/OFF control signal output terminal    “H”: LED ON

50 to 54

P91 to P95

—

Not used (open)

55

VSS

—

Ground terminal

56

IRQACE

I

Interrupt request signal input terminal    Not used (fixed at “L” )

57

SCK

I

Serial clock signal input from the digital signal processor (IC601)

58

RXD

I

Serial data receive signal input from the digital signal processor (IC601)

59

TXD

O

Serial data transmit signal output to the digital signal processor (IC601)

60

IRQ0

I

Serial clock signal input from the digital signal processor (IC601)

61

AVCC

—

Power supply terminal (+3.2V) (for the analog)

62

AN0

I

Battery voltage detect input terminal

63, 64

PB1, PB2

I

Not used (fixed at “L” )