Lesson 3 – Setting up the Digitizers in the Digital Clock Domain
207
Calculation of Fs and N
These are the valid N values for all analog modules which divide
the master clock to generate the sampling frequency Fs.
Valid Clock Divisors of Analog Modules
* The Nmin value applies for the minimum master clock frequency of 200MHz and the
Nmax value for the maximum frequency of 500 MHz. The equation Fs = MCLK/N must
always result in an Fs value in the module’s Fs range.
Analog Module Nmin - Nmax *
WDB 98 – 62500
WDE 40 - 4000
WDA 5 - 500
WDD 1 – 500 (4 – 500 for sampler mode)
SPA 200 - 62500
SPB 20 - 5000
WGA 196 - 62500
WGE 7 - 62500
WGB 2 - 62500
WGD 1 - 61440
WGF N must be set to -16, -8, -4, -2, 1, 2, 4 or 8.
(-16, -8, -4 and -2 mean 1/16, 1/8, 1/4 and 1/2)