S5L1454A Datasheet, PDF (31/161 Pages) Samsung semiconductor – DVD PLAYER DIGITAL SERVO & DSP IC

DVD PLAYER DIGITAL SERVO & DSP IC
S5L1454A
COMMAND
 FOCUS GAIN control : Transmit FGAcmd(B4xxxx)
 TRACKING GAIN control : Transmit TGAcmd(B5xxxx)
Related Register
Register
xGcnt
xGwt
Ffrq
Kf
Kcf
FGok
FGmax
FGmin
Tfrq
Kt
Kct
TGok
TGmax
TGmin
Address
10C5
10C4
0074
0076
0032
10B2
005C
005D
0078
007A
0033
10B3
005E
005F
Function
Measurement period
wait time
Focus loop bandwidth (sine freq.)
F_gain (sine) disturbance level
F_gain control sensitivity coefficient
F_gain control ok level
F_gain control upper limit
F_gain control lower limit
Tracking loop bandwidth (sine freq.)
T_gain (sine) disturbance level
T_gain control sensitivity coefficient
T_gain control ok level
T_gain control upper limit
T_gain control lower limit
Command
AFFFF5
AFFFF4
AAFFFE
BE0076
AEFFFE
ADFFF2
AAFFF7
AAFFF8
AAFFFF
BE007A
AEFFFF
ADFFF3
AAFFF9
AAFFFA
Operation Description
A sine wave is output to the FOD output, and the phase difference (ψ) of the signals that have passed through
mech such as P/U, and the original sine wave are compared. The loop EQ filter's final output gain is
automatically adjusted so that the phase difference is 90°.
The adjustment is repeated many times to find the optimum state, and BPF is carried out to eliminate the noise
components in the input signal.
Xwave
2π
DTx
ψ
31