RE: QSPI Erratum 122 QSPI power consumption in idle NRF52840

Kazi Afroza Sultana — Tue, 03 Oct 2023 05:21:48 GMT

Hello,

Glad to hear that. 🙂

RE: QSPI Erratum 122 QSPI power consumption in idle NRF52840

robsrick — Wed, 27 Sep 2023 13:36:12 GMT

Hi Kazi

I got it working thanks. I was a bit unclear about how to include the uninit function but i found it in the nrfx_qspi.h header.

RE: QSPI Erratum 122 QSPI power consumption in idle NRF52840

Kazi Afroza Sultana — Wed, 27 Sep 2023 12:12:44 GMT

Hello,

''Why do I see high current draw if there is a fix in Zephyr?''

I am not sure if you apply everything accordingly why the current consumption is high. What is the high current? Are you measuring the current of nRF52840 only here? How have you measrued te current. Can we show the setup?

The Errata is very much straight forward. After QSPI has been activated by the use of TASKS_ACTIVATE task the current consumption will be high. Then we have to execute the following code before disabling QSPI.

so, the answer to your question ''I've tried implementing the above code snippet and it does reduce current but I guess i have to re-init each time i want to use the qspi?'' is yes.


*(volatile uint32_t *)0x40029010ul = 1ul;
*(volatile uint32_t *)0x40029054ul = 1ul