參數(shù)資料
型號(hào)： LC89057W-VF4-E
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 7 X 7 MM, SQFP-48
文件頁(yè)數(shù)： 10/61頁(yè)
文件大小： 355K
代理商： LC89057W-VF4-E
LC89057W-VF4-E
No. 7202-18/61
8.1.9 Clock switch transition signal output (CKST)
CKST outputs "L" when the output clock changes through PLL lock/unlock.
In the lock-in stage, the CKST "L" pulse falls at the word clock generated from the XIN clock after PLL is locked
following detection of input data, and rises at the same timing as RERR following the lapse of a given period.
In the unlock stage, the CKST "L" pulse falls at the same timing as PLL lock detection signal RERR and rises
following a given number of word clocks generated from the XIN clock has been counted.
The PLL lock status change and clock change timing can be known through detection of the rising and falling edges
of the CKST "L" pulse.
VCO clock
XTAL clock
RMCK
(a) Lock-in stage
CKST
RERR
Locked status
UNLOCK
LOCK
UNLOCK
CKST
RERR
(b) Unlock stage
RMCK
RX0 to RX6
Digital data
After PLL lock
Same timing
as RERR
0.6 ms to 6.4 ms
45 ms to 300 ms
VCO clock
XTAL clock
Locked status
RX0 to RX6
Same timing
as RERR
Figure 8.4. Clock Switch Timing
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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