Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

max data rate calculation for NIOS II

Hi, i want to know how to calculate the max data rate that a NIOS II processor can read from a PIO interface. As far as i understand, i think it depends on core frequency of NIOS II and also may b...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

It depends on a few factors, and I'm not sure you can get a constant value for this.

Like you mentioned, Nios II frequency and instruction cycles play a role.

You can also look at the latency from the PIO, which I believe is 1 cycle.

Next is the system architecture. The arbitration within the bus will affect the latency of data coming back.

Your best bet is to use tightly-coupled memories for the CPU data and instruction, have direct connections to your PIO without going through bridges, etc.