Could turn out to be a difficult task.
In PSoC1 there is a decimator used together with the ADC and there is only one decimator.
In PSoC5 the ADC uses some fixed-function blocks which cannot be built from other resources.
And afaik there is no PSoC containing two DelSigADCs.
For my design I inted to use a simple counter as a decimator, does that mean PSoC 1 is thr better choice?
I am not sure at all.
PSoC5 has tremendously more digital resources compared to PSoC1 and the choice of programming those using VeriLog.
Why don't you start by switching on Creator 3.0 and entering your design. if it doesn't fit switch over to Designer 5.4 and start over. When one of these do fit, get hands on an evaluation kit and continue with the real hardware.
Take a look at this for PSOC 1 -
Pretty easy to mplement basic modulator. And rest of discussion seems to be enough
to handle S/H. a 29466 can handle 16 8 bit counters/timers to 4 32 bit and most variations
Debugging a little more painful on PSOC 1, you need to have ICE Cube.
There is a pair of postings from kees about just that:
For SC/CT primitives see here: http://www.cypress.com/?app=forum&id=2492&rID=76860
Is this for a product or for your education.
If you are dead set on using a PSoC5 and it is for a product or especially for motor control I would go with a separate ADC like a AD7403. Patching a SigmaDelta ADC together is always noisy and slow and bound to cause problems.