Rev. C | Page 14 of 24
DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)
A1A2A3A4A5B1B2B3B4B5B6B7B8B9B10B11B12B13 RSV
CONTROL
BITS
5-BIT A COUNTER
13-BIT B COUNTER
DB21DB22DB23
CP GAIN
DIVIDE-BY-
2 SELECT
DIVIDE-
BY-2
RESERVED
CPGDIV2
DIVSEL
THIS BIT IS NOT USED
BY THE DEVICE AND
IS A DON'T CARE BIT.
A5 A4 .......... A2 A1
A COUNTER
DIVIDE RATIO
0 0 .......... 0 0 0
0 0 .......... 0 1 1
0 0 .......... 1 0 2
0 0 .......... 1 1 3
. . .......... . . .
. . .......... . . .
. . .......... . . .
1 1 .......... 0 0 28
1 1 .......... 0 1 29
1 1 .......... 1 0 30
1 1 .......... 1 1 31
F4 (FUNCTION LATCH)
FASTLOCK ENABLE
CP GAIN OPERATION
CHARGE PUMP CURRENT SETTING 1
IS PERMANENTLY USED
00
CHARGE PUMP CURRENT SETTING 2
IS PERMANENTLY USED
10
N = BP + A; P IS PRESCALER VALUE SET IN THE CONTROL LATCH.
B MUST BE GREATER THAN OR EQUAL TO A. FOR CONTINUOUSLY
ADJACENT VALUES OF (N × F
REF
), AT THE OUTPUT, N
MIN
IS (P
2
–P).
B13 B12 B11 B3 B2 B1 B COUNTER DIVIDE RATIO
.......... 00 0 0
0 0 0
0 0 0
0 0 0
0 0 NOT ALLOWED
.......... 0 0 1 NOT ALLOWED
.......... 0 1 0 NOT ALLOWED
.......... 1 1 1 3
.......... .. . .
. . .
. . .
. . .
.......... . . . .
.......... . . . .
.......... 11 1 1
1 1 1
1 1 1
1 1 1
0 0 8188
.......... 1 0 1 8189
.......... 1 1 0 8190
.......... 1 1 1 8191
04438-018
DIV2
0
1
DIVIDE-BY-2
FUNDAMENTAL OUTPUT
DIVIDE-BY-2
DIVSEL
0
1
DIVIDE-BY-2 SELECT (PRESCALER INPUT)
FUNDAMENTAL OUTPUT SELECTED
DIVIDE-BY-2 SELECTED
