參數(shù)資料
型號: LMX2531LQ2570E
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: XO, clock
英文描述: PLLatinum High Performance Frequency Synthesizer System with Integrated VCO
中文描述: PLL FREQUENCY SYNTHESIZER, 80 MHz, QCC36
封裝: 6 X 6 MM, 0.80 MM HEIGHT, LEAD FREE, LLP-36
文件頁數(shù): 16/25頁
文件大?。?/td> 589K
代理商: LMX2531LQ2570E
2.0 General Programming Information
(Continued)
2.3 REGISTER R2
2.3.1 R[5:0] -- R Counter Value
These bits determine the phase detector frequency. The OSCin frequency is divided by this R counter value. In single-ended
mode, values of 1-63 are allowed. In differential mode, only 1,2,4,8,16, and 32 are allowed.
R Value
0-1,3,5-7,9-15
,17-31,33-63
2
4
8
16
32
R[5:0]
Illegal State
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
2.3.2 DEN[21:12] and DEN[11:0]-- Fractional Denominator
These bits determine the fractional denominator. Note that the MSB bits for this word are in register R3. If the FDM bit is set to
0, DEN[21:12] are ignored.
DEN[21:12]
DEN[11:0]
Fractional
Denominator
0
...
4095
4096
...
4194303
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
L
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