ADF4106
Table IV. AB Counter Latch Map
CONTROL
BITS
13-BIT B COUNTER
RESERVED
6-BIT A COUNTER
DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8
DB7 DB6 DB5 DB4 DB3 DB2
DB1 DB0
X
X
G1
B13
B12
B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
A6
A5
A4
A3
A2
A1 C2 (0) C1 (1)
X = DON’T CARE
A COUNTER
A6
A5
..........
A2
0
0
1
1
.
.
.
0
0
1
1
A1
0
1
0
1
.
.
.
0
1
0
1
DIVIDE RATIO
0
1
2
3
.
.
.
60
61
62
63
0
0
0
0
.
.
.
1
1
1
1
0
0
0
0
.
.
.
1
1
1
1
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
B13
B12
B11
B3
0
0
0
1
.
.
.
1
1
1
1
B2
0
0
1
1
.
.
.
0
0
1
1
B1
B COUNTER DIVIDE RATIO
NOT ALLOWED
NOT ALLOWED
NOT ALLOWED
3
.
.
.
8188
8189
8190
8191
0
0
0
0
.
.
.
1
1
1
1
0
0
0
0
.
.
.
1
1
1
1
0
0
0
0
.
.
.
1
1
1
1
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
0
1
0
1
.
.
.
0
1
0
1
F4 (FUNCTION LATCH)
FASTLOCK ENABLE
CP GAIN
OPERATION
0
0
1
1
0
1
1
2
0
1
1
CHARGE PUMP CURRENT SETTING
IS PERMANENTLY USED.
CHARGE PUMP CURRENT SETTING
IS PERMANENTLY USED.
CHARGE PUMP CURRENT SETTING
IIS PERMANENTLY USED.
CHARGE PUMP CURRENT IS
SWITCHED TO SETTING 2. THE
TIME SPENT IN SETTING 2 IS
DEPENDENT ON WHICH FASTLOCK
MODE IS USED. SEE FUNCTION
LATCH DESCRIPTION
N = BP + A; P IS PRESCALER VALUE SET IN THE FUNCTION LATCH.
B MUST BE GREATER THAN OR EQUAL TO A. FOR CONTINUOUSLY
ADJACENT VALUES OF (N ꢄ F
), AT THE OUTPUT,
N
, IS (P2 – P).
REF
MIN
THESE BITS ARE NOT USED
BY THE DEVICE AND ARE
DON'T CARE BITS.
–12–
REV. A
ADI [ ADI ]
