Can Curie be powered by 3.7v battery directly?

[idata]

I have found that the range of VSYS is 1.9V~4.4V and I want to set 3.3V as Curie's main power. Does it mean that I can power Curie with 3.7v Li battery directly and not need a LDO chip to transform 3.7V to 3.3V?

[idata]

Hi liuzhu,

Thanks for your interest in the Intel Curie Platform.

I have checked the datasheet for the Intel Curie Module and it states that it only works with 3.3 V or 1.8V interfaces. Please see Section 4 of this datasheet: https://software.intel.com/en-us/articles/intel-curie-module-datasheet Intel® Curie™ Module Datasheet | Intel® Software .

Could you be so kind to provide me the link where you find this information?

I will be waiting for your reply, have a nice day!

Best Regards,

-Jose.

[idata]

Hi Jose,

I have found the information from Table 3-1 of this datasheet: https://software.intel.com/en-us/articles/intel-curie-module-datasheet Intel® Curie™ Module Datasheet | Intel® Software .

And from Figure 5 of https://software.intel.com/en-us/articles/intel-curie-module-design-guide Intel® Curie™ Module Design Guide ，it seems like I can connect VBATT to pin VSYS as main power of Curie and there is no need to transform 3.7V of the battery to 3.3V.

Am I right?

Bset Regards.

[idata]

Hi liuzhu,Seems like you are right! Reading again Section 4, it is talking about internal voltage regulators. I apologize for the misunderstanding.Thanks for providing the right information!Have a nice day!Best Regards,-Jose.

[idata]

Hi Jose,

I have another question and need your help. If VSYS is not powered, is it possible to power Curie by USB_3P3？

Thank you !

[idata]

Hi liuzhu,

The USB_3P3 is a dedicated LDO for the USB, if you power the Curie by using the VDD_USB you should be fine. Since the Curie is intended to be supplied by direct USB power, a charging device or a battery.Hope you find this information useful, have a nice day!Best Regards,-Jose.

[idata]

Hi Jose,

I want to confirm the message you send. If I leave ball L4(VSYS) floating and at the same time ball K4(VDD_USB) is connected to USB power, the chip could still work well and every function is normal?

Best Regards,

[idata]

Hi liuzhu,

Yes that is right!Have a nice day!Best Regards,-Jose.