S5L9291 View Datasheet(PDF) - Samsung

Part Name

Description

Manufacturer

S5L9291

DIGITAL SIGNAL PROCESSOR

Samsung 

DIGITAL SIGNAL PROCESSOR

S5L9291X

SMDS

Hi-Z

SOFFSET

< SMDS output >

SMDS gain control

If the pickup or spindle motor is changed, the entire CLV loop transfer function changes and thus CLV gain must

be controlled. The CLV servo is changed to PI controller type; we can assume that the frequency error output

SMDS controls the P gain and the phase error output SMDP controls the I gain. SMDS gain can be set to 9B’h

SGAIN[2:0] , where gain values of SGAIN are shown below. In terms of a graph, the gain is the slope.

SGAIN[2:0]

000

001

010

011

100

101

110

111

Gain Value

1

2

4

8

16

32

64

128

rise_mtval

0

144

216

252

270

279

283

285

< SMDS gain setting >

SMDS High width (t)

288t

rise_mtval

288t

Maximum error area

< SMDS gain vs SMDS output >

WFCK High width (t)

1t = 1/8.4672MHz

71

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