Sony CD Walkman D-NE509, Service Manual

8

D-NE509

SECTION 5

DIAGRAMS

5-1. IC PIN DESCRIPTIONS

• IC601  CXD3048R (RF AMP, DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, D-RAM CONTROLLER)

Pin No.

Pin Name

I/O

Pin Description

1

XRAS

O

Low address strobe signal output to the D-RAM

2

XWE

O

Data input enable signal output to the D-RAM

3 to 6

D1, D0, D3, D2

I/O

Two-way data bus with the D-RAM

7

DCLK

O

Not used (open)

8

DCKE

O

Not used (open)

9

XCAS

O

Column address strobe signal output to the D-RAM

10

WFCK/DQM

O

Not used (open)

11 to 13

A9 to A7

O

Address signal output to the D-RAM

14

DVSS

—

Ground

15 to 17

A6 to A4

O

Address signal output to the D-RAM

18

XRDE

I

D-RAM read enable signal input

19

VDD0

—

Power supply

20

CLOK

I

Serial data transfer clock signal input from TMP91CW28FG

21

SDTO

I

Serial data input from TMP91CW28FG

22

SENS

O

Serial data output to TMP91CW28FG

23

XLAT

I

Serial data latch pulse signal input from TMP91CW28FG

24

XSOE

I

Serial data output enable signal input from TMP91CW28FG

25

SYSM

I

Analog muting on/off control signal input from TMP91CW28FG    “H”: muting on

26

WDCK

O

Not used (open)

27

SCOR

O

Subcode sync (S0+S1) detection signal output to TMP91CW28FG

28

XRST

I

Reset signal input from TMP91CW28FG    “L”: reset

29

PWMI

I

Not used (fixed at “L”)

30

XQOK

I

Not used (fixed at “L”)

31

XWRE

I

Not used (fixed at “L”)

32

R8M

O

System clock output to TMP91CW28FG

33

VSS0

—

Ground

34

SQCK

I

SQSO readout clock signal input    Not used (fixed at “H”)

35

SCLK

I

SENS serial data read clock signal input    Not used (fixed at “H”)

36

SQSO

O

Not used (open)

37

XEMP

O

Not used (open)

38

XWIH

O

Not used (open)

39

SBSO

O

Not used (open)

40

EXCK

O

SQSO readout clock signal output    Not used (pull down)

41

XTSL

I

Input terminal for the system clock frequency setting (pull down)

42

HVSS

—

Ground

43

HPL

O

Not used (open)

44

HPR

O

Not used (open)

45

HPVDD

—

Power supply

46

XVDD

—

Power supply

47

XTAI

I

System clock input (16.934 MHz)

48

XTAO

O

System clock output (16.934 MHz)

49

XVSS

—

Ground

50

AVDD1

—

Power supply

51

AOUT1

O

L-ch analog audio signal output

52

VREFL

O

L-ch reference voltage output

53, 54

AVSS1, AVSS2

—

Ground

55

VREFR

O

R-ch reference voltage output

56

AOUT2

O

R-ch analog audio signal output

57

AVDD2

—

Power supply