S1M8831A Samsung Semiconductor, Inc., S1M8831A Datasheet - Page 20

• Manufacturer Part Number: S1M8831A
• Description: Fractional-n Rf/integer-n If Dual Pll Frequency Synthesizer
• Manufacturer: Samsung Semiconductor, Inc.

S1M8831A/33
RF Fractional Counter
F Counter Value: -31488(2's complementary) to 31488
NOTE: For a negative integer, the counter value should be inputted as the corresponding 2's complementary binary code.
20
Value(F)
Counter
-31488
31488
RF Fractional Counter Value (F Counter)
FRAC_ CNTR[18:2] ; for S1M8831A/33 RF
MSB
23
-1
-2
2
1
0
RF_NA_CNTR
For instance, the 2's complementary binary code of -2 is
1 1111 1111 1111 1110.
[23:20]
Program Code
16
F
0
0
0
0
1
1
1
15
F
20
0
0
0
0
1
1
1
19
TEST
14
F
1
0
0
0
1
1
0
13
18
F
1
0
0
0
1
1
0
12
F
1
0
0
0
1
1
0
11
F
1
0
0
0
1
1
0
Division Ratio of the RF Fractional Counter
10
F
0
0
0
0
1
1
1
RF_Frac[23:0]
F
9
1
0
0
0
1
1
0
FRAC_CNTR[18:2]
F
8
1
0
0
0
1
1
1
F
7
0
0
0
0
1
1
0
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
F
6
0
0
0
0
1
1
0
F
5
0
0
0
0
1
1
0
F
4
0
0
0
0
1
1
0
Control Bits
F
3
0
0
0
0
1
1
0
2 1
F
2
0
0
0
0
1
1
0
1
F
1
0
1
0
0
1
1
0
LSB
1
0
F
0
0
0
1
0
1
0
0