nRF52833 TAExt Extended Operating Temperature

[LongQi]

The spec says "Some electrical parameters are valid only for the TA operating temperature conditions. "

1. what is the "Some electrical parameters" here means?
2. what will happen if LFXODEBOUNCE is enabled below Extended Operating Temperature?

[runsiv]

Hi

From what I can see the following is affected: 

VREG0OUT,ERR,EXT
tSTART_LFXO_EXT
fTOL_HFINT,EXT
INFC_LEAK_EXT
TTEMP,ACC,EXT

Regarding question two I'm asking internally and will get back to you

Regards

Runar

[runsiv]

Quick question. When you mean below  Extended Operating Temperature, do you mean within then normal operating temperature range? 

Regards

Runar

[LongQi]

yes, because I notice the temperature is not so stable so if I may need to turn on LFXODEBOUNCE before it reaches the boundary. 

[runsiv]

Hi, 

Thank you for your patience, I'm waiting to hear back from the developers regarding question 2

Regards

Runar

[LongQi]

any progress?

[runsiv]

Hi

The UART baudrate accuracy is dependent on HFCLK. I don't think LFXO is related. We do not see the risk of enabling LFXODEBOUNCE earlier when it hasn't reached the EOC condition. It is actually not allowed to change reg value LFXODEBOUNCE when LFXO is starting. 

I would just like to emphasize that for UART it is essential that the HXFO is on, I would presume this is even more important in regards to temperature .  

Regards

Runar