參數(shù)資料
型號: CXD2597Q
廠商: Sony Corporation
元件分類: 數(shù)字信號處理
英文描述: CD Digital Signal Processor with Built-in Digital Servo and DAC
中文描述: CD數(shù)字信號處理器,具有內(nèi)置數(shù)字伺服和DAC
文件頁數(shù): 59/115頁
文件大小: 881K
代理商: CXD2597Q
– 59 –
CXD2597Q
(a) Auto focus ($47)
Focus search-up is performed, FOK and FZC are checked, and the focus servo is turned on.
If $47 is received from the CPU, the focus servo is turned on according to Fig. 4-3. The auto focus starts with
focus search-up, and note that the pickup should be lowered beforehand (focus search down). In addition,
blind E of register 5 is used to eliminate FZC chattering. Concretely, the focus servo is turned on at the falling
edge of FZC after FZC has been continuously high for a longer time than E.
Fig. 4-6-(a). Auto Focus Flow Chart
Auto focus
Focus search up
FOK=H
NO
YES
FZC = H
NO
YES
FZC = L
NO
YES
END
Focus servo ON
(Check whether FZC is continuously high
for the period of time E set with register 5.)
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