nRF9160 VDD VDD_GPIO power-up sequence

[romang]

Hi

According to the Hardware Design Guide, the following conditions must be met:
https://infocenter.nordicsemi.com/pdf/nwp_037.pdf

However, to save on space and components, I would like to tie VDD and VDD_GPIO to the same supply without a dedicated switch for VDD_GPIO supply. The nRF91 will be enabled all the time but the power supply of the whole device can be switched on and off. Does ignoring the power-up sequence of VDD and VDD_GPIO harm the nRF9160 in any way? If i interpret the design of the DK correctly the, above conditions (especially bullet point nr. 2) are not met.

Tank you!

[Priyanka]

Hi Roman,

This should be okay as long as there is a supply on VDD whenever there is supply on VDD_GPIO. So it should be fine to tie them together.

Regards,

Priyanka