ADF4157

Rev. 0 | Page 14 of 20

DB31

RESERVED

5-BIT R-COUNTER

CURRENT

SETTING

CONTROL

BITS

DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

00

0

C1

CPI4 CPI3 CPI2 CPI1

0

P1

U2

U1

R5

R4

R3

R2

R1

0

00

000

00

00

00

C3(0) C2(1) C1(0)

C1

CYCLE SLIP

REDUCTION

0DISABLED

1ENABLED

U1

REFERENCE

DOUBLER

0

DISABLED

1ENABLED

R5

R4

R3

R2

R1

R COUNTER DIVIDE RATIO

00

00

1

1

00

01

0

2

00

01

1

3

00

10

0

4

.....

.....

.....

11

10

1

29

11

11

.

30

11

11

1

31

00

00

0

32

U2

R DIVIDER

0DISABLED

1ENABLED

P1

PRESCALER

04/5

18/9

ICP (mA)

CPI4

CPI3

CPI2

CPI1

5.1kΩ

00

00

0.31

00

01

0.63

00

10

0.94

00

11

1.25

01

00

1.57

01

01

1.88

01

10

2.19

01

11

2.5

10

00

2.81

10

01

3.13

10

10

3.44

10

11

3.75

11

00

4.06

11

01

4.38

11

10

4.69

11

11

5

Figure 19. R Divider Register (R2) Map