Is high UART power consumption still a thing with 52832 and NCS?

RE: Is high UART power consumption still a thing with 52832 and NCS?

Priyanka — Thu, 14 Jul 2022 13:11:32 GMT

In order to disable, there are two ways. You can use Zephyr APIs as mentioned here.
You can also disable on a register level as described here. But in order to enable again, you should not enter "1" but this value. Then start the RXD and TXD.

-Priyanka

RE: Is high UART power consumption still a thing with 52832 and NCS?

AndreKR — Thu, 14 Jul 2022 13:03:52 GMT

Can you tell me which API calls I should look into? I can't find anything that seems related to init/uninit.

RE: Is high UART power consumption still a thing with 52832 and NCS?

Priyanka — Thu, 14 Jul 2022 12:59:22 GMT

Yes, then you will need to diasable or uninit them in order to reduce the current consumption.

-Priyanka

RE: Is high UART power consumption still a thing with 52832 and NCS?

AndreKR — Wed, 13 Jul 2022 12:50:06 GMT

I have it with status = "okay" in my device tree and I am using it with uart_poll_out() and uart_irq_rx_enable(). (I can change to a different API if it saves power.) The question is if during times in my program where I don't need it, do I need to manually disable it to get lowest possible power consumption?

RE: Is high UART power consumption still a thing with 52832 and NCS?

Priyanka — Wed, 13 Jul 2022 12:27:28 GMT

Hi Andre,

If you have not enabled the UART in your program and it is not running, then this will not contribute in power consumption.

P.S app_uart_close() is used for nRF5 SDK.

Best Regards,

Priyanka

RE: Is high UART power consumption still a thing with 52832 and NCS?

AndreKR — Wed, 13 Jul 2022 10:26:33 GMT

Which include file would I need for app_uart_close() and how can I reinitialize the UART?

RE: Is high UART power consumption still a thing with 52832 and NCS?

Zara Wu — Wed, 13 Jul 2022 03:30:58 GMT

Hello,

We recommend calling API: app_uart_close() when turning off the UART, and reinitializing the UART when turning it on.

Hope it helps.

BR./Zara Wu （RF-star technology)