S5L1454A データシートの表示（PDF） - Samsung
部品番号
コンポーネント説明
メーカー
S5L1454A Datasheet PDF : 161 Pages
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DVD PLAYER DIGITAL SERVO & DSP IC
S5L1454A
Home In detection by limit S/W (when there is no sled position sensor) :
If there is a limit S/W, it is set to HDWcmd's LIM = L (sled stop determined by limit S/W), DSSP's PS0 pin is
changed to SSTOP, and the limit S/W is connected to that block.
SLDcmd's home = L (normal), SMOV, SPLY's bit is controlled, and MICOM is manual.
¢º¢º FOCUS SEARCH (DISC DETECTION)
Summary :
The FOD outputs delta waves and moves the actuator up and down to determine disc presence and disc type
using the FE (S_CURVE) signal. The results are sent to MICOM using a data bus.
Input signal : FE
Output signal : FOD, MDATA[7:0]
COMMAND
DDTcmd(A1xxxx) Focus search & Disc detect
Related REGISTER
REGISTER
FSpk
ADDR.
0055
unBal
POS_J
DDT_J
Fpk_J
LYdt
NZlvl
00BD
10C7
10C8
10C9
10CE
10CC
FUNCTION
Ouput control coefficient at F_srch pull_in(% of full
swing)
S_curve unbalance % reference
Determine with FODbias level
Detection level
S_curve size level
layer length level
noise level
COMMAND
AAFFF0
BE00BD
AFFFF7
AFFFF8
AFFFF9
AFFFFE
AFFFFC
Operation Description
When the focus search command is received, the output signal FOD starts at the Vref voltage and outputs
triangular waveforms. At this time, search speed or slope is decided by the FSP value from the disc detect
command coefficients.
Disc presence and type are detected by the disc detect command, and its references include the following:
(1) FEpk : FE input signal's peak to peak value
(2) DBL : Number of S-curves
(3) POS : S-curve detection location
(4) DIN : S-curve presence
The location for carrying out disc detection is in the middle of moving from the lower value to the upper value
when AUTO = L and UPDN = H. The results are stored in [FEpk] and [DDTdt]. After completing the disc detect
command, the OR values of the two memories are output to MICOM (refer to command set's DDTcmd).
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