Datasheet

ADF4156 Data Sheet
Rev. E | Page 10 of 24
REGISTER MAPS
FRAC/INT REGISTER (R0)
PHASE REGISTER (R1)
MOD/R REGISTER (R2)
FUNCTION REGISTER (R3)
CLK DIV REGISTER (R4)
DB31
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
M4
M3 M2
M1 N12
N11
N10 N9
RE-
SERVED
MUXOUT CONTROL 12-BIT INTEGER VALUE (INT) 12-BIT FRACTIONAL VALUE (FRAC)
CONTROL
BITS
N8
N7 N6 N5 N4 N3 N2 N1 F12 F11 F10 F9
F8 F7
F6
F5 F4
F3 F2
F1
C3(0) C2(0) C1(0)
DB31
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
RESERVED 12-BIT PHASE VALUE (PHASE)
1
CONTROL
BITS
0 0
0 0 0 0 0 0 P12 P11 P10 P9 P8 P7
P6 P5
P4 P3
P2
P1 C3(0)
C2(0) C1(1)
DB31
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 L2 L1 C1 CPI4
CPI3 CPI2
CPI1 0 P1
U2 U1
R5
R4 R3 R2 R1 M12
M11 M10 M9 M8 M7 M6 M5
M4
M3 M2 M1 C3(0)
C2(1)
C1(0)
RESERVED
RESERVED CSR EN PRESCALER
RDIV2
1
REFERENCE DOUBLER
1
NOISE
MODE
CURRENT
SETTING
1
5-BIT R COUNTER
1
CONTROL
BITS
12-BIT MODULUS WORD
1
DB31
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 0 U12 0 0 0
0 0 0 U7 U6 U5 U4
U3 C3(0) C2(1)
C1(1)
CONTROL
BITS
RESERVED RESERVED
LDP PD
POLARITY Σ-Δ
RESET
PD
CP THREE- STATE COUNTER RESET
DB31
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 M2 M1 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 0 0
0 0 C3(1)
C2(0) C1(0)
CONTROL
BITS
RESERVEDRESERVED
CLK
DIV
MODE
12-BIT CLOCK DIVIDER VALUE
05863-010
1
DOUBLE BUFFERED BIT.
Figure 16. Register Summary