MB1511 Fujitsu, MB1511 Datasheet - Page 6

• Manufacturer Part Number: MB1511
• Description: Serial Input PLL Frequency Synthesizer
• Manufacturer: Fujitsu

6
MB1511
(1)
Programmable reference divider consists of 16-bit shift register, 15-bit latch and 14-bit reference counter. Serial
16-bit data format is shown below.
Programmable Reference Divider
14-BIT PROGRAMMABLE REFERENCE COUNTER DIVIDE RATIO
NOTES:
Divide Ratio
C
16383
R
8
9
S
1
Divide ratio less than 8 is prohibited.
Divide ratio: 8 to 16383
SW: This bit selects divide ratio of prescaler.
S1 to S14: These bits select divide ratio of programmable reference divider.
C: Control bit (sets as high level).
Data is input from MSB side.
S
SW = H: 64/65
SW = L: 128/129
2
14
S
Divide ratio of programmable reference counter setting bit
0
0
1
Control bit
LSB
S
3
13
S
0
0
1
S
4
12
S
0
0
1
S
5
11
S
0
0
1
S
6
10
S
0
0
1
S
7
S
9
0
0
1
Divide ratio of prescaler setting bit
S
8
S
8
0
0
1
S
9
S
7
0
0
1
10
S
S
6
0
0
1
11
S
S
5
0
0
1
MSB
12
S
S
4
1
1
1
13
S
S
3
0
0
1
14
S
S
2
0
0
1
W
S
S
1
0
1
1