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PDF S1L9251X Data sheet ( Hoja de datos )
| Número de pieza | S1L9251X | |
| Descripción | CD-ROM 48X RF AMP | |
| Fabricantes | Samsung semiconductor | |
| Logotipo |  |
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CD-ROM 48X RF AMP
S1L9251X
INTRODUCTION
CD-ROM 48X RF AMP Chip is RF pre signal processor and processes signals from optical pick-up. This chip
processes main signal through summing amp, AGC block, EQ block, and generates SERVO error signals for
SERVO control. It can playback CD-ROM and CD-RW disc.
MAIN FEATURES (FEATURES, CHARACTERISTICS)
• CD-ROM 48X
— 1, 4, 8: CLV mode
— Maximum Speed of 48X: CAV mode
• Support CD-R/RW disc
• RF Amp & Equalizer
• Focus Error Amp
• Tracking Error Amp (3-Beam)
• Mirror (RFCT, RFRP) Signal Detection
• Defect Signal Detection
• Built-in AGC Function
• ALPC (Automatic Laser Power Control) Block
• Built-in RF Envelop Detector
• SBAD Signal Generation
• Signal Generation for Center Position Servo
• Built-in Serial Interface Port
• Power Down Mode
1
1 page  
CD-ROM 48X RF AMP
S1L9251X
PIN DESCRIPTION (Continued)
No Name
32 CP2
I/O Description
O Capacitor for RFRP, RFCT
33 RFRP
34 RFRPI
O RFRP output
I Input for MIRR
35 CP_ENV
I Capacitor for Envelope Hold
36 RFEQO
37 AGCIN
O Summing and EQ signa of A,B,C,Dl
I Input for AGC
38 CAGC
39 CLPF
I Hold Capacitor for AGC
I LPF output buffer REF connecting pin
40 PLLF
I RF Frequency control for wide band PLL
41 LPFADJ
42 RFO
O LPF Frequency select for wide band PLL
O RF Signal Output
43 CM8
44 CM4
O EQ Boost frequency for 8X speed
O EQ Boost frequency for 4X speed
Related Block
Mirror
Mirror
MIRR
ENV
RFSUM
AGC
AGC
AGC
EQ
EQ
RFSUM
EQ
EQ
SERIAL INTERFACE
Serial Interface Timing Graph
— The Serial Interface controls the Disc type, Speed, AGC, and Laser Diode On/Off.
— The Timing Diagram of the Serial Interface is shown below:
RFEN
RFDATA
RFCLK
Address, 8-bit
Data, 8-Bit
A7 A0 D7 D0
— RFCLK : Clock synchronized with data from MICOM
— RFDATA : Address and Data from MICOM
— RFEN : Indicates Data is Enabled
5
5 Page 
CD-ROM 48X RF AMP
S1L9251X
• Address : 05H
DATA D7 D6
Function
DFCT_CNST
Initial Value
0
0
D5 D4
FE_LPF
00
D3
RSV
0
D2
0
DFCT_CNST (D7 - D6): Short time constant of defect detect block select
D7 D6 DEFECT
0 0 100µS/V
0 1 25µS/V
1 0 12.5µS/V
1 1 5.6µS/V
FE_LPF (D5 - D4): FE LPF frequency select
D5 D4 MODE
0 0 40 kHz
0 1 80 kHz
1 0 120kHz
1 1 360kHz
FE_ATT (D2 - D0): FE attenuate gain select
D2 D1 D0 MODE
0 0 0 − 6 dB
0 0 1 − 2.5 dB
0 1 0 0 dB
0 1 1 1.5 dB
1 0 0 2.5 dB
1 0 1 3.5 dB
1 1 0 5 dB
1
1
1
6 dB
FE ATT Gain
D1
FE_ATT
1
D0
0
11
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet S1L9251X.PDF ] | |
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