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IC, CXA1082BQ
Pin No.
Pin Name
1
vc
S
Description
Connected to VREF.
BE
2
FGD
When the high frequency gain of the focus servo is lowered, a capacitor is connected
between this terminal and pin 3.
FS3
The high frequency gain of the focus servo is switched with ON/OFF of FS3
.
O|
—
g
sapajtu
SI
©
on
tn
Ee)
Time constant external terminal for switching the tracking high-frequency gain.
TGO
O
TG2
oO
Time constant external terminal for switching the tracking high-frequency gain
AVCC
=
Power supply terminal. (+5V)
TAO
Tracking error signal output terminal.
TAO
I
Tracking amplifier inversion input terminal.
SL @
SLO
Output terminal of the sled amplifier.
SSTOP
I
ON/OFF detection signal terminal of limit switch detects the inner-most circumference.
ms
Non-inversion input terminal of the sled amplifier.
b
jo]
=
_ — — —
—_
_—
—_ —_
20
C. OUT
oO
Count signal output of the tracking in the high-speed access mode.
21
DIRECT
It is used when the one-track jump. It is normally set to "H".
A direction of the tracking jump pulse is inverted when "L".
It is set in a time to "L" at the start and fall of TZC. (Not used)
22
XRST
oO
All the internal register are cleared when "L".
:
DATA
I
Serial data transmission from the CPU.
3
Ww
24
XLT
0
Data of the internal serial shift register is transmitted to each latch memory which the
address is decoded when "L".
26
DGND
Ground.
Time constant external terminal of the loop filter.
nN
~s
wW
=
nN oO
PDI
ISET
VCOF
3.5V
Input terminal of data PDO output from phase comparator CXD1167Q.
NY Xo
The current which set the height of focus search, tracking jump and sled kick is suppliéd.
The free running frequency of VCO corresponds to the resist value between pin 30 and
Ww
E
+4
iS)
S
~~
,
pars
pin3l.
8.64MHz VCO output terminal.
DVCC
Power supply terminal. (+5V)
C864
| oO |
33
LOCK
a
Connected to the LOCK terminal of CXD1167Q.
34
D
| 1
Terminal to connect the MDP terminal of CXD1167Q.
35
MON
Terminal to connect the MON terminal of CXD1167Q.
36
FSW
Zs
LPF time constant external terminal of the CLV servo difference signal.
i
Ww ~~
-~72-
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