參數(shù)資料
型號: S1M8837
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
中文描述: 分?jǐn)?shù)N射頻/整數(shù)N如果雙鎖相環(huán)
文件頁數(shù): 17/29頁
文件大?。?/td> 234K
代理商: S1M8837
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
S1M8836/37
17
Programmable
Counter(N Counter)
If the Control Bits are 01(IF), 10, and 11(RF), data is transferred from the 22-bit shift register into the N/Frac-
latch. N Counter consists of swallow counter(A counter; 3-bit for IF & S1M8836RF and 4-bit for S1M8837RF),
main counter(B counter; 7-bit for S1M8836/37 RF and 12-bit for IF), and fractional counter(F counter; 17-bit for
S1M8836/37 RF). Serial data format is shown below.
IF N
Counter
MSB
W2[21:0]
LSB
CMOS
IF_CP_WORD
[18:17]
IF_NB_CNTR[16:5] : 3 - 4095
21
17 16
2 1
0
Program Code
Division Ratio of the IF N Counter
Control Bits
IF_NA_CNTR[4:2] :
0 - 7
0
1
19 18
5 4
IF Main
Counter
Division
Ratio(B
Counter
)
IF_NB_ CNTR[16:5] ; for S1M8836/37
Division
Ratio(B)
3
4
4095
11
10
9
8
7
6
5
4
3
2
1
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
1
0
1
1
0
1
Division
ratio:
3
to
4095 (The division ratios less than 3 are prohibited)
Swallow
Counter
Division
Ratio (A
Counter)
IF_NA_CNTR[4:2] ; for S1M8836/37
Division Ratio(A)
0
2
0
1
0
0
0
1
0
0
1
7
1
1
1
Division Ratio: 0 to 7, B>A
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