REV. B

–18–

ADF4252

Table VII. IF N Divider Register Map

B12

B11

B10

B3

B2

B1

B COUNTER DIVIDE RATIO

000

..........

0113

000

..........

1004

...

..........

....

...

..........

....

...

..........

....

111

..........

100

4092

111

..........

101

4093

111

..........

110

4094

111

..........

111

4095

A COUNTER

A6

A5

..........

A2

A1

DIVIDE RATIO

00

..........

0

0

0

00

..........

0

1

1

00

..........

1

0

2

00

..........

1

1

3

..

..........

.

.

.

..

..........

.

.

.

..

..........

.

.

.

11

..........

0

0

60

11

..........

0

1

61

11

..........

1

0

62

11

..........

1

1

63

*N = BP + A, P IS PRESCALER VALUE. B MUST BE GREATER THAN OR EQUAL TO A FOR CONTIGUOUS VALUES OF N, N

P14

P13

PRESCALER VALUE

00

8/9

01

16/17

10

32/33

11

64/65

P15

IF CP GAIN

0DISABLED

1ENABLED

DB20

DB19

DB18

DB17

DB16

DB15

DB14

DB13

DB12

DB11

DB10

DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

C2 (0)

C1 (0)

A1

A2

A3

A4

A5

B1

B2

B3

B4

B5

B6

B7

B8

B9

B10

B11

B12

P13

A6

CONTROL

BITS

6-BIT IF A COUNTER*

12-BIT IF B COUNTER*

DB21

IF

PRESCALER*

DB22

DB23

P14

P15

C3 (1)