DS_S1M8837 Datasheet, PDF (18/29 Pages) Samsung semiconductor – FRACTIONAL-N RF/INTEGER-N IF DUAL PLL

S1M8836/37
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
RF N Counter
MSB
FoLD[21:18]
RF_CP_WORD
[17:13]
21
18 17
13 12
Program Code
W3[21:0]
RF_NB_CNTR[12:6] : 3 ~ 127
Division Ratio of the
RF N Counter
LSB
RF_NA_CNTR[5:2] 1
0
65
21
0
Control Bits
• RF Main Counter Division Ratio (B Counter)
RF_NB_ CNTR[12:6] ; for S1M8836/37
Division
6
5
4
3
Ratio(B)
3
0
0
0
0
4
0
0
0
0
•
•
•
•
•
7
1
1
1
1
Division ratio : 3 to 127 (The division ratios less than 3 are prohibited)
• RF Swallow Counter Division Ratio (A Counter)
RF_NA_CNTR[5:2] ; for S1M8836
Division Ratio(A)
3
2
0
X
0
1
X
0
•
•
•
7
X
1
Division Ratio : 0 to 7
X = Don't care condition
RF_NA_CNTR[5:2] ; for S1M8837
Division Ratio(A)
3
2
0
0
0
1
0
0
•
•
•
15
1
1
NOTE: Division Ratio: 0 to 15
X = Don't care condition
2
1
0
0
1
1
1
0
0
•
•
•
1
1
1
1
0
0
0
0
1
•
•
1
1
1
0
0
0
0
1
•
•
1
1
18