S1M8821 Samsung Semiconductor, Inc., S1M8821 Datasheet - Page 15

• Manufacturer Part Number: S1M8821
• Description: Interger Rf/if Dual Pll Frequency Synthesizer
• Manufacturer: Samsung Semiconductor, Inc.

INTERGER RF/IF DUAL PLL
Programmable Counter(N Counter)
If the Control Bits are 10(IF) or 11(RF), data is transferred from the 20-bit shift register into the N-latch. N Counter
consists of 7-bit swallow counter(A counter) and 11-bit main counter(B counter). Serial data format is shown below.
•
•
Division ratio : 3 to 2047
Division ratio : 0 to 127
C1
7-Bit Swallow Counter Division Ratio(A Counter)
11-Bit Main Counter Division Ratio(B Counter)
Ratio(A)
Division
127
Division
C2
0
1
Ratio
2047
3
4
LSB
N
1
B
N
N
7
0
0
1
2
A
18
N
3
N
N
6
0
0
1
0
0
1
Control Bits
RF
N
4
N
5
0
0
1
17
N
0
0
1
Division Ratio of the N Counter, N
N
5
N
4
0
0
1
N
6
16
N
N
3
0
0
1
0
0
1
N
7
N
2
0
0
1
N
8
15
N
0
0
1
N
1
0
1
1
N
9
14
N
0
0
1
10
N
Division ratio : 0 to 15
11
N
Ratio(A)
Division
13
N
0
0
1
15
0
1
12
N
13
N
12
N
0
0
1
X = DON’T CARE condition
B > A
N
X
X
X
7
14
N
11
15
N
X
X
X
N
6
0
0
1
N
IF
16
N
N
X
X
X
5
10
N
0
1
1
17
N
N
4
0
0
1
MSB
18
N
Program Modes
N
N
3
0
0
1
9
1
0
1
S1M8821/22/23
19
N
N
2
0
0
1
20
N
N
8
1
0
1
N
1
0
1
1
15