【nRF5282 Radio Clock】what is the clock speed for Radio when using softdevice

[xiaolongba]

Hi Nordic experts, 

Recently, I consulted the datasheet and tried to find out something about the radio speed when using softdevice, unfortunately, I can't find anything about it except for the following diagram:

as you know, other competitors have one clock tree on the datasheet and it is easy to check what is the radio clock. so could you share with me something about it? in my understanding, the radio clock for n52832 should be 32MHz when using the softdevice.

also, I am a bit confused about this parameter information, as below:

what does it mean? could you explain it more details? based on the datasheet described, it should be 5.3mA, as below:

pls correct me if I misunderstood.

thanks in advance.

[ovrebekk]

Hi

xiaolongba said:

ovrebekk Bro, thanks for the replies. The reason why I asked this question is that I am checking the power consumption, comparing to the other competitors in the same conditions, where the radio clock is one of the conditions. 

Hm, seems like an odd thing to consider. I guess the main point is which radio has the lowest power consumption and what the performance of the radio is, not how it works on the inside?

Either way, I checked this, and it seems the digital part of the radio uses the standard 16MHz peripheral clock, while the analog part of the radio uses the 32MHz clock from the crystal directly. 

xiaolongba said:

Ok, I also considered it before, but the 7.1 mA can not match the value of the power profile online tool. As u know, we can see the radio tx current when using the power profile online tool, is it the same as each other?

Remember to set the voltage to 3.0V, not 3.3V. Then the OPP shows 6.7mA, which is relatively close. The numbers from the OPP should be the most accurate, since they are based on testing with the DK. 

Best regards
Torbjørn

[xiaolongba]

ovrebekk said:

I guess the main point is which radio has the lowest power consumption and what the performance of the radio is, not how it works on the inside?

exactly.

ovrebekk said:

Either way, I checked this, and it seems the digital part of the radio uses the standard 16MHz peripheral clock, while the analog part of the radio uses the 32MHz clock from the crystal directly. 

got it. whether the clock for them can be modified or not?

ovrebekk said:

Remember to set the voltage to 3.0V, not 3.3V. Then the OPP shows 6.7mA, which is relatively close. The numbers from the OPP should be the most accurate, since they are based on testing with the DK. 

Got it.

[ovrebekk]

Hi

xiaolongba said:

got it. whether the clock for them can be modified or not?

No, you can't change this. The radio is designed to use these clocks only. 

Best regards
Torbjørn 

[xiaolongba]

Got it, you can close this ticket now. thanks