Pin Function

Descriptions enclosed in brackets apply to the LA9231M only.

Pin

No.

Symbol

Contents

1

FIN2

Pickup photodiode connection pin. Added to FIN1 pin to generate the RF signal, subtracted from FIN1 pin to generate

the FE signal.

2

FIN1

Pickup photodiode connection pin.

3

E

Pickup photodiode connection pin. Subtracted from F pin to generate the TE signal.

4

F

Pickup photodiode connection pin.

5

TB

TE signal DC component input pin.

6TE

−

Pin which connects the TE signal gain setting resistor between this pin and TE pin.

7

TE

TE signal output pin.

8

TESI

TES (Track Error Sense) comparator input pin. The TE signal is input through a bandpass filter.

9

SCI

Shock detection input pin.

10

TH

Tracking gain time constant setting pin.

11

TA

TA amplifier output pin.

12

TD

−

Pin for configuring the tracking phase compensation constant between the TD and VR pins.

13

TD

Tracking phase compensation setting pin.

14

JP

Tracking jump signal (kick pulse) amplitude setting pin.

15

TO

Tracking control signal output pin.

16

FD

Focusing control signal output pin.

17

FD

−

Pin for configuring the focusing phase compensation constant between the FD and FA pins.

18

FA

Pin for configuring the focusing phase compensation constant between the FD

19

FA

−

Pin for configuring the focusing phase compensation constant between the FA and FE pins.

20

FE

FE signal output pin.

21

FE

−

Pin which connects the FE signal gain setting resistor between this pin and FE pin.

22

AGND

Analog signal GND.

23

SP

CV

24

SPI

Spindle amplifier input.

25

SPG

12-cm spindle mode gain setting resistor connection pin.

26

SP

−

Spindle phase compensation constant connection pin, along with the SPD pin.

27

SPD

Spindle control signal output pin.

28

SLEQ

Sled phase compensation constant connection pin.

29

SLD

Sled control signal output pin.

30

SL

−

Input pin for sled movement signal from microprocessor.

31

SL

+

Input pin for sled movement signal from microprocessor.

32

JP

−

Input pin for tracking jump signal from DSP.

33

JP

+

Input pin for tracking jump signal from DSP.

34

TGL

Input pin for tracking gain control signal from DSP. Gain is low when TGL is high.

35

TOFF

Input pin for tracking off control signal from DSP. Tracking servo is off when TOFF is high.

36

TES

Output pin for TES signal to DSP.

37

HFL

The High Frequency Level is used to determine whether the main beam is positioned over a bit or over the mirrored

surface.

38

SLOF

Sled servo off control input pin

39

CV

−

Input pin for CLV error signal from DSP.

40

CV

+

Input pin for CLV error signal from DSP.

41

RFSM

RF output pin.

42

RFS

−

RF gain setting and EFM signal 3T compensation constant setting pin, along with the RFSM pin.

43

SLC

Slice Level Control is an output pin that controls the data slice level used by the DSP for the RF waveform.

44

SLI

Input pin used by DSP for controlling the data slice level.

45

DGND

Digital system GND pin.

46

NC

No connection

[FSC]

[Focus search smoothing capacitor output pin.]

47

NC

No connection

48

NC

No connection

49

DEF

Disc defect detection output pin.

50

CLK

Reference clock input pin. 4.23 MHz signal from the DSP is input.

51

CL

Microprocessor command clock input pin.

Continued on next page.

LA9230M/9231M

No.5189 - 4/20