Actual Definition of RT1170 Set Points

[mrbrooks]

I'm trying to understand the actual definition of the 16 setpoints on the RT1170 series. There are a variety of documents that describe parts of the picture but I don't have a complete one.

The power states example in the SDK seems like a good starting point, but it arbitrarily defines certain setpoints that are used and some that aren't. There doesn't seem to be any justification for this. The power numbers I yield from the demo also are much higher then the datasheet values, so perhaps more configuration is needed?

The datasheet (https://www.nxp.com/docs/en/data-sheet/IMXRT1170CEC.pdf) seems to have the best information in the power consumption section (4.1.5) but it's unclear if this actually defines the setpoint. For example, does the below information indicate what setpoint 11 (in CPU state active) actually does when I enter it? Or is it saying that setpoint 11 is used for this power measurement and in addition all of t these other things were set using SW control to get that power number? 

The low power states doc (https://www.nxp.com/docs/en/application-note/AN13148.pdf) seems to be the next best resource because it has tables of each module and indicates which items (i.e. DCDC or SRC) are on/off (and shows some code that indicates clock rates).

The power mode debug doc (https://www.nxp.com/docs/en/application-note/AN13104.pdf) shows SP0-3 at a very high level but then proceeds to use SP5 in the example (which isn't defined anywhere in the doc).

The reference manual (https://www.nxp.com/webapp/Download?colCode=IMXRT1170RM) describes them at a high level but doesn't detail the 16 setpoints.

Thanks for your help

[kerryzhou · Accepted solution]

Hi @mrbrooks 

  1. About the power consumption higher than the datasheet

  Please tell me which detail mode you have tested in the SDK low power demo:

\SDK_2_10_1_MIMXRT1170-EVK\boards\evkmimxrt1170\demo_apps\power_mode_switch

Give me your test result, and the related datasheet data.

2. About the document

  I think AN13148 is very good.

3. About setpoint 11

  Yes, the datasheet already give the test details and the power consumption for Set Point #11 active

Please also associated with the SDK code:

Press M to enter Set Point: 11
M7 CPU mode: SUSPEND
M4 CPU mode: SUSPEND
System standby

Wish it helps you!

Best Regards,

Kerry