Datasheet

REV. B
ADF4252
–13–
Table II. Register Summary
RF CONTROL REG
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)A1A2A3A4A5B1B2B3B4B5B6B7B8B9B10B11B12P13 A6
6-BIT IF A COUNTER12-BIT IF B COUNTER
DB21
IF PRESCALER
DB22DB23
IF CP GAIN
P14P15 C3 (1)
DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (0) C1 (1)R1R2R3R4R5R6R7R8R9R10R11R12R13R15P16
15-BIT IF R COUNTER
C3 (1)R14
IF REF
IN
DOUBLER
RF N DIVIDER REG
IF R DIVIDER REG
RF R DIVIDER REG
DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (0) C1 (1)
M1
M2M3
M4M5
M6
M7
M8
M9M10
M11M12
R1R3
R4
P2 P3
12-BIT INTERPOLATOR MODULUS VALUE (MOD)
C3 (0)
4-BIT RF R COUNTER
R2
PRESCALER
RF REF
IN
DOUBLER
MASTER REG
IF N DIVIDER REG
IF CONTROL REG
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (1)P9P10P11P12M1M2M3M4
MUXOUT
C3 (0)
XO
DISABLE
POWER-
DOWN
CP THREE-
STATE
COUNTER
RESET
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)
F1F2F3F4F5F6F7
F8
F9F10F11F12N1N3
N4N5
N6
CONTROL
BITS
12-BIT RF FRACTIONAL VALUE (FRAC)
DB23 DB22
DB21
N7
RESERVED
N8
P1
C3 (0)
8-BIT RF INTEGER VALUE (INT)
N2
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)P4P5P6N1P8 0CP1CP2N2T1T2T3N3
RF CP
CURRENT
SETTING
RF PD
POLARITY
C3 (0)
RESERVED
NOISE AND
SPUR
SETTING 1
RF
POWER-
DOWN
RF CP
THREE-
STATE
RF
COUNTER
RESET
RESERVED
NOISE AND
SPUR
SETTING 2
NOISE AND
SPUR
SETTING 3
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)P17P18P19P20P21CP1CP2CP3PR1T7T8PR2PR3
IF CP CURRENT
IF PD
POLARITY
C3 (1)
RESERVED
IF LDP
IF POWER-
DOWN
IF CP
THREE-
STATE
IF
COUNTER
RESET
RF PHASE
RESYNC
RF PHASE
RESYNC
SETTING
CONTROL
BITS
CONTROL
BITS
CONTROL
BITS
CONTROL
BITS
CONTROL
BITS
CONTROL
BITS