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IC DESCRIPTION-1/2 (LA9250M)-1/2
Pin No.
Pin Name
1, 2
FIN2, 1
3
E
4
F
5
TB
6
TE-
7
TE
8
TESI
9
SCI
10
TH
11
TA
12
TD-
13
TD
14
JP
15
TO
16
(NC)
17
FD
18
FD-
19
FA
20
FA-
21
FE
22
FE-
23
SP
24
SPG
25
SP-
26
SPD
27
SLEQ
28
SLD
29
SL-
30
SL+
31
OSC
32
(NC)
33
SLOF
34
TGRF
35
SP8
36
EFBAL
37
FSTA
38
LASER
I/O
I
Pickup photodiode (focus, RF) connection.
I
Pickup photodiode (tracking) connection.
I
TE signal DC component input. Pickup photodiode (tracking) connection.
—
TE signal gain setting resistor connection. A resistor is connected between this pin and TE.
O
TE signal output.
I
TES comparator input. Takes the bandpass filtered TE signal as its input.
I
Shock detection input.
—
Tracking gain time constant setting.
O
TA amplifier output.
In conjunction with the TD and VR pins, used to form the tracking phase compensation circuit
—
constant.
—
Tracking phase compensation setting.
—
Track jump signal amplitude setting.
O
Tracking control signal output.
—
No connection.
O
Focusing control signal output.
In conjunction with the FD and FA pins, used to form the focusing phase compensation circuit
I
constant.
In conjunction with the FD- and FA- pins, used to form the focusing phase compensation circuit
O
constant.
In conjunction with the FA and FE pins, used to form the focusing phase compensation circuit
I
constant.
O
FE signal output.
I
FE signal gain setting resistor connection. A resistor is connected between this pin and FE.
—
CLV pin input signal inverted output.
—
Gain setting resistor connection. (12 cm spindle mode)
—
In conjunction with the SPD pin, spindle phase compensation time constant connection.
O
Spindle control signal output.
—
Sled phase compensation time constant connection.
O
Sled control signal output.
I
Sled feed signal input from the microcontroller.
I
—
Oscillator frequency setting.
—
No connection.
I
Sled servo off control input.
—
Tracking servo gain RF level follower function setting.
—
Spindle 8 cm/12 cm mode switching control from the DSP.
I
E/F balance adjustment signal input from the DSP.
I
Focus search control signal input from the DSP.
I
Laser on/off control from the DSP.
Description
-23-
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