AK1590 Datasheet, PDF (23/36 Pages) Asahi Kasei Microsystems – 1GHz Delta-Sigma Fractional-N Frequency Synthesizer

High
Positive
[AK1590]
Low
Low
Negative
Charge pump output voltage ^High
Fig. 11 Charge Pump slope Polarity
PRE[1:0] : Select a dividing ratio for the prescaler.
D9 D8
Function
0 0 P=4
0 1 P=8
1 0 P=16
1 1 P=16
Remarks
R[7:0]: Set a dividing ratio for the reference clock.
This can be set in the range from 4 (4 divisions) to 255 (255 divisions). 0 to 3 cannot be set.
D7 D6 D5 D4 D3 D2 D1 D0 Function
Remarks
00000000
0
Prohibited
00000001
1
Prohibited
00000010
2
Prohibited
00000011
3
Prohibited
DATA
11111101
253
11111110
254
11111111
255
MS1478-E-01
23
2013/2