Enter Clock Source(s) (MHz):

Select VCO:

Enter VCOa Frequency Lo Limit (MHz):   Hi Limit (MHz):

Select Clock:

Enter clock: lo limit (MHz): Hi Limit Step (MHz):


All calculations are based on: Freq(out) = (Xtal * (a + b / 1048575 ) ) / d ... which is based on: 
c = 1048575 = (2^20-1) = 0xFFFFF

P1[17:0]  ==  128 * a + floor( 128 * b / c ) - 512  ==  0x80 * a + floor( 0x80 * b / 0xFFFFF ) - 0x200

P2[19:0]  ==  128 * b - c * floor( 128 * b / c )    ==  0x80 * b - 0xFFFFF * floor( 0x80 * b / 0xFFFFF )

P3[19:0]  ==  1048575                               ==  0xFFFFF

Given that C is a constant 104857510 or 0xFFFFF, the expression "floor( 0x80 * b / 0xFFFFF )" equates to b * 0.000816
which can be obtained by shifting b right once and grab the top 2 nibbles of the 5 nibble 'b' word.

r26_VCOa P3[15:8] = 0xFF, r27_VCOa P3[7:0] = 0xFF, r28_VCOa 0b000000:P1[17:16] = 0
R42 = 0; R43 = 1; R47 = 0; R48 = 0; R49 = 0;


Crystal=25, Desired clock0 Span: 7,000,000 b(lo) - 7,125,000 b(hi) == VCOa Span: 700(lo) - 725(hi)
adclock0
(lo max[0])		clock0
(hi max[c])		b(lo edge)
7,000,000		b(inc step)
7,125,000		Resolution
in Hz		r29_VCOa
P1[15:8]		r30_VCOa
P1[7:0]		r31_VCOa
P3[19:16]:P2[19:16]		r32_VCOa
P2[15:8]		r33_VCOa
P2[7:0]		r44r45r46
281007,000,000.007,250,000.000 0.23841858$0C$00$F:$0$00$00$00$30$00
3FFFF.C000000000step $0C$40$F:$0$00$00