Difference between Zynq 7010 and 7020

[MRsdr]

Hi,

I have limited experience of Zynq and FPGA programming. I'm considering STEMlab 125-14 for my project. I don't need very high speed ADC or DAC. ~5MHz would be sufficient probably. I need to be able to detect very weak signals, so I think I would go for "low noise" version.

Latency is the challenge in my application. I need to decode received signal from ADC and start transmission within certain time limit. I have about 100us time to reply decoded signal. As I don't have much experience of Zynq/FPGA programming, my first idea would be using "standard" FPGA code and write bare metal C code, which might be sufficient to solve my latency challenge.

Better way is probably to utilize FPGA more by writing custom Verilog code. I just wonder how much there are resources left in Zynq 7010 version? Or should I go directly to Zynq 7020 version?

Best regards,
MR

[juretrn]

I don't know how much logic you plan on adding, but more than likely you will be fine using the 7010 based board.
Current resource utilization on RP with Zynq 7010:
https://imgur.com/a/lV3P1s3

[MRsdr]

It looks like 7010 should be fine. I'm not sure how much logic I would finally need. I expect I need some IIR/FIR filtering, decimation/interpolation and some kind of clock synchronization logic.