The questions of current consumption in the datasheet

[Hsu]

Hi Sir,

According to the nRF52832_PS_v1.4.pdf,
In section 17.1.1, the table shows the current consumption of Radio.
What's difference w/ Iradio_tx0 and Is0? Why do we get higher consumption in Is0?

in section 7.2.1, for CPU performance
What's the purpose and difference for "running from flash" (ex: Iddflashcache) and "running from RAM" (ex: Iddram)?

How to set the "running from flash" or "running from RAM"?

Thank you.

BRs, Han

[Amanda Hsieh]

Hi, 

 

What's difference w/ Iradio_tx0 and Is0? Why do we get higher consumption in Is0?

Iradio_tx0 is measurement with CPU in WFI/WFE sleep as the Table 23 described. Is0  is measurement while CPU running CoreMark from Flash. Please see this post.

What's the purpose and difference for "running from flash" (ex: Iddflashcache) and "running from RAM" (ex: Iddram)?

It shows the data is taken from flash or RAM.

 

How to set the "running from flash" or "running from RAM"?

This post describes how to execute code from RAM using Keil, and the the tutorial shows the adjustment of RAM and Flash memory.

Best regards,

Amanda 

[Hsu]

HI Amanda,

Thanks for the update.

The post for the CPU running CoreMark from Flash is private. (I got the Access Denied.)

Could you check this part?

Thank you

BRs, Han

[Amanda Hsieh]

Hi, 

Sorry for that I am not aware of the permission. There might be the useful information from that case for you:

In general I would say that pre- and post processing is CPU running code from flash, while radio TX and RX are with CPU idle for most part. If you want to run CPU while radio is in TX or RX, you may add about 2mA on the peak currents as a rough estimate.

-Amanda