S1M8821 Samsung Semiconductor, Inc., S1M8821 Datasheet - Page 14

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

S1M8821/22/23
PROGRAMMING DESCRIPTION
Control Bits
Programmable Reference Counter(IF / RF R Counter)
If the Control Bits are 00(IF) or 01(RF), data is moved from the 20-bit shift register into the R-latch which sets the
reference counter. Serial data format is shown in the table below.
•
Division ratio : 3 to 32767
Data are shifted in MSB first
14
Division
32767
Ratio
15-Bit Programmable Reference Counter Ratio
C1
3
4
²
C2
LSB
15
R
R
0
0
1
1
²
C1
0
0
1
1
R
2
14
R
0
0
1
²
R
3
Control Bits
13
Control Bits
R
0
0
1
²
R
4
Division Ratio of the R Counter, R
R
5
12
R
0
0
1
²
R
6
11
R
0
0
1
²
R
7
C2
0
1
0
1
10
R
R
8
0
0
²
1
R
9
R
9
0
0
²
1
10
R
R
²
8
0
0
1
11
R
12
R
R
²
7
0
0
1
13
R
R
²
6
0
0
1
14
R
DATA Location
RF R Counter
RF N Counter
IF R Counter
IF N Counter
15
R
R
²
5
0
0
1
16
INTERGER RF/IF DUAL PLL
R
²
R
4
0
0
1
Program Modes
17
R
MSB
²
R
18
3
0
1
1
R
19
R
²
R
2
1
0
1
20
R
²
R
1
1
0
1