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參數(shù)資料
| 型號(hào)： | S5L9286 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | DIGITAL SIGNAL PROCESSOR FOR CDP |
| 中文描述： | 數(shù)字信號(hào)處理器的CDP |
| 文件頁數(shù)： | 23/35頁 |
| 文件大?。?/td> | 598K |
| 代理商： | S5L9286 |
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DIGITAL SIGNAL PROCESSOR FOR DISCMAN
S5L986F02
23
Phase-Mode
The phase mode is the mode to control the EFM phase. Phase difference between PBFR/4 and XTFR/4 is
detected when NCLV of CNTL-Z register is "L",and phase difference between Read Base Counter/4 and Write
Base Counter/4 detected when NCLV is "H", and the difference is outputted to SMDP(Fig.14).
If the cycle of VCO/2 signal is put as "T" and it is put as "/WP" during a "H" period of PBFR, it outputs "H" to SMSD
terminal from the falling edge of PBFR to the (/WP-278T) x 32, and then, outputs "L" to the falling edge of the next
PBFR. (Figure 7)
XPHSP-Mode
The XPHSP mode is the mode used in normal operation.
The LKFS signal made from frame sync block is to sampling which period is PBFR/ 16. If the sampling is "H", the
Phase mode is performed, and if the sampling is eight of "L" continously, Speed-mode is performed automatically.
The selection of peak hold period in Speed-mode and selection of bottom hold period and gain in Speed/ Hspeed-
mode is determined by CNTL-W register.
VPHSP-Mode
The VPHSP mode is the mode used for rough servo control. It uses VCO instead of X-tal in the EFM pattern test.
When the range of VCO center changes, VCO is easily locked because the rotation of a spindle motor changes in
the same direction.
Stop-Mode
This mode stops the spindle motor.
SMDP
SMSD
SMEF
SMON
L
Hi-Z
L
L
Figure 7. SMSD, SMDP Output Timing Diagram
Hi-Z
Hi-Z
Hi-Z
XTFR/4;
(XTFR/8)
PBFR/4;
(PBFR/8)
SMDP
287T
288T
PBFR
SMSD
294T
512T
PBFR
SMSD
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