參數(shù)資料
型號: S1M8836X01-G0T0
元件分類: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 1000 MHz, CQCC24
封裝: 3.50 X 4.50 MM, QFN-24
文件頁數(shù): 16/29頁
文件大?。?/td> 234K
代理商: S1M8836X01-G0T0
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
S1M8836/37
23
foLD Control
Control Words
Control bits
Acronym
LOW (0)
HIGH (1)
Comments
foLD
W3[21:18]
foLD
select LDs monitoring mode of
internal counters.
Lock Detector
(LD), Test mode
foLD[3]
foLD[2]
foLD[1]
foLD[0]
foLD Output State
0
Disabled(default LOW)
0
1
RF and IF Analog Lock Detect
0
1
0
Reserved Test Mode
0
1
Reserved Test Mode
X
1
0
Reserved Test Mode
X
1
0
1
IF R Counter Output
X
1
0
IF N Counter Output
X
1
RF R Counter Output
1
0
RF N Counter Output
1
0
1
Reserved Test Mode
1
0
1
0
Reserved Test Mode
1
0
1
Reserved Test Mode
When the PLL is locked and the analog lock detect mode is selected, the foLD output is HIGH, with narrow
pulses LOW.
Lock Detector(LD)
There is analog mode for S1M8836/37. The foLD bits, W3[21:18], are used to select the lock detection mode and
to output the selected lock signal through the foLD pin.
The foLD output becomes HIGH with narrow pulsed LOW while both RF and IF PLLs are locked and thereby the
output should be low-pass filtered for a DC locked voltage HIGH.
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