Data Sheet

ADF4158

Rev. I | Page 13 of 35

REGISTER MAPS

DB31

CONTROL

BITS

12-BIT MSB FRACTIONAL VALUE

(FRAC)

12-BIT INTEGER VALUE (INT)

MUXOUT

CONTROL

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

M4

R1

M3

M2

M1

N12

N11

N10

N9

N8

N7

N6

N5

N4

N3

N2

N1

F25

F24

F23

F22

F21

F20

F19

F18

F17

F16

F15

F14 C3(0) C2(0) C1(0)

FRAC/INT REGISTER (R0)

DB31

CONTROL

BITS

RESERVED

13-BIT LSB FRACTIONAL VALUE

(FRAC) (DBB)

RESERVED

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

0

0

0

0

F13

F12

F11

F10

F9

F8

F7

F6

F5

F4

F3

F2

F1

0

0

0

0

0

0

0

0

0

0

0

0

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

LSB FRAC REGISTER (R1)

DB31

RESERVED

NOTES

1. DBB = DOUBLE-BUFFERED BIT(S).

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

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

NS1

U12

0

0

RM2 RM1

PE1

FE1

U11

U10

U9

U8

U7

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

FUNCTION REGISTER (R3)

DB31

5-BIT R-COUNTER

CP

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

0

0

0

CR1 CPI4 CPI3 CPI2 CPI1

0

P1

U2

U1

R5

R4

R3

R2

R1

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

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

R-DIVIDER REGISTER (R2)

DBB

DBB

Figure 21. Register Summary 1