topic Re: FS26 - RSTB Path Check in Power Management

FS26 - RSTB Path Check

wolfbiker1 — Wed, 14 May 2025 09:23:18 GMT

Hi,

I am struggling doing FS26 RSTB Path check. How can I determine if the device boots up from cold start or from the reset injected with RSBT_REQ? (See SBC_FS26_FS_SAFE_IOS_1_ADDR Register)

I did some comparisons of those bits, cold start vs. rstb req but they are all similar.

Any suggestions here?

Thanks.

Re: FS26 - RSTB Path Check

TomasVaverka — Wed, 21 May 2025 10:55:04 GMT

Hi Benjamin,

When the device starts from POR, BATTERY fail will be set (WUEVENT[3:0] = 0b1111).

For RSTB_REQ, this is requested by MCU, so the MCU knows this action, no register bits indicate it.

When there is external RSTB, RSTB_EVENT bit will be set.

BRs, Tomas

Re: FS26 - RSTB Path Check

wolfbiker1 — Wed, 14 May 2025 11:39:17 GMT

Hi Tomas,

thank you very much for your response. As written in the data sheet I don't have the BAT_FAIL bit, but there is a BATTERY fail bit in M_WIO_FLG register at position WUEVENT[3:0]. All bits are always 0, any suggestions on that? May it regard with the debug mode of the SBC?

Best,
Benjamin

Re: FS26 - RSTB Path Check

wolfbiker1 — Mon, 19 May 2025 05:30:20 GMT

Hello, may I have a quick update on my previous question? Thanks!