CC2652RB: About VDDR_CAP in CCFG

junde deng

Intellectual 280 points

Part Number: CC2652RB

Hi TI,

I have a project based on SDK4.30.

After build, the hex file's VDDR_CAP area value is 0xF3 and the power consumption is high.

But when I change this value to 0xFF, the power consumption is lower.

Both of the functionality are well.

The description of this area as below, but I can't understand what it is meaning. And I also don't know where I have config it in my project.

Could you help me?

But the way, I want to know what the relationship between the bosh picture things(up and down).

Thank you so macu.

over 3 years ago

0 desouza over 3 years ago

TI__Guru**** 171104 points

Hi,

The VDDR_CAP register is not used in this family of devices. A reference is shown at:

https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/888031/cc2642r-setting-appropriate-values-to-the-vddr_cap-in-ccfg

The launchpad reference design and the general directives shown in the document below should be followed.

CC13xx/CC26xx Hardware Configuration and PCB Design Considerations Application Report.

Regarding the picture, I am not entirely sure what you mean with your question. It shows the recharge timelines of the two families of devices: the top timeline refers to CC13x0/CC26x0 while the bottom timeline shows the behaviour of anything newer, including the device you are using (indicated at the top of this thread).

Hope this helps,

Rafael

0 junde deng over 3 years ago in reply to desouza

Intellectual 280 points

Hi Rafael,

Thanks for your reply.

There is a phenomenal of my project: the VDDR_CAP area in my project's firmware is 0xF3, that's have high power consumption. If I change 0xF3 to default value 0xFF, the power consumption is lower.

desouza said:
The VDDR_CAP register is not used in this family of devices. A reference is shown at:

as you said, if this area is not used in CC2652RB, why the value is 0xF3 but NOT the defualt value 0xFF?

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CC2652RB: About VDDR_CAP in CCFG