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Altera_Forum's avatar
Altera_Forum
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15 years ago

Nios II processor modes

Hi, I want to control the nios ii processor and make different modes for it. like: sleep, standby, working.... so my first question: is it possible to do smth like this? if yes.. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi, i have written a Nios sleep component for a battery powered design.

You must write an avalon mm slave component for SOPC builder.

If you accessing your component e.g. read or write to it,

the slave responds by asserting waitrequest, stalling the transfer.

(Nios is in sleep mode)

The component have to release the waitrequest signal by an external event. e.g. a timer overfolw.

(This will wake up the Nios)

Look into the "mnl_avalon_spec.pdf" Figure 3–3. Slave Read and Write Transfers with Waitrequest. This will help.