ANT Forum

Hello,

we are using the nRF24AP2-1CH from Nordic.
We have a button that puts the MCU to sleep. For power save, we want to put the ANT to power save, too. So we put the SLEEP to HI and the SUSPEND to LOW. The power consumptions falls down.

But when we want to wake up, we have this problem:
We put SUSPEND to HI and SLEEP to LOW and then we do the init of the ANT. And here the code stucks. We can't get the nRF running after Power-Save-Mode.

Any ideas?

Best regards,
Johannes      

Johannes,

If you have not read this yet, a useful resource would be the Power States Application Note.

You are trying to save power by putting the ANT chip in the sleep state or idle state (Sleep Asserted) before putting it in the suspend state (Suspend Asserted). Could you verify that SLEEP is asserted before SUSPEND?

The suspend state is primarily for USB sticks that require suspend functionality and you might be better off trying to put the ANT chip in the Idle State (same consumption as Suspend State).

If this document does not offer much help, I would recommend taking a look at the errata documentation available for the nRF24AP2-1CH on the Nordic Semiconductor Website. (http://www.nordicsemi.com/eng/Products/ANT/nRF24AP2-1CH). Could you let us know what build of the nRF chip you are using? D or M? (Indicated on the chip markings: NRF D or M).