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參數(shù)資料
型號(hào): LC78630E
元件分類(lèi): 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: QFP-80
文件頁(yè)數(shù): 4/33頁(yè)
文件大小: 432K
代理商: LC78630E
CLV mode
In CLV mode, the system detects the disc speed from the HF signal and holds the disc at the prescribed linear
speed using multiple control methods switched by changing the DSP internal mode. The PWM frequency is
7.35 kHz. The V/P pin outputs a high level when the system is in rough servo mode and a low level when it is in
phase control mode.
Rough servo gain switching
The CLV control gain in rough servo mode can be reduced by 8.5 dB from the 12-cm disc setting for 8-cm discs.
Phase control gain switching
The phase control gain can be switched by switching the value of the divisor in the dividers in the stage preceding
the phase comparator.
Internal brake modes
No. 5121-12/33
LC78630E
Internal mode
CLV+
CLV
V/P
Rough servo (velocity too low)
High
Low
High
Rough servo (velocity too high)
Low
High
Phase control (PCK locked)
PWM
Low
Code
Command
RES = low
$A8
8-cm DISC LOADED
$A9
12-cm DISC LOADED
r
Code
Command
RES = low
$B1
CLV PHASE COMPARATOR DIVISOR: 1/2
$B2
CLV PHASE COMPARATOR DIVISOR: 1/4
$B3
CLV PHASE COMPARATOR DIVISOR: 1/8
$B0
NO CLV PHASE COMPARATOR DIVISOR USED
r
Code
Command
RES = low
$C5
INTERNAL BRAKE ON
$C4
INTERNAL BRAKE OFF
r
$A3
INTERNAL BRAKE CONT
$CB
INTERNAL BRAKE CONTINUOUS MODE
$CA
RESET CONTINUOUS MODE
r
$CD
TON MODE DURING INTERNAL BRAKING
$CC
RESET TON MODE
r
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