FS26 Perform RSTB path check

liyongfeng — Fri, 21 Apr 2023 09:18:03 GMT

RSTB assertion can be requested by SPI with the bit RSTB_REQ in FS_SAFE_IOS_1，then the software reads the RSTB _ DIAG flag for judgment.

But after the MCU reset, how does the software identify the reset reason is power reset or RSTB_REQ?

Please help me give me a way to implement step4, thank you!

Close the initialization phase by sending the first good WD refresh.
Clear all the flags by writing in FS_DIAG_SAFETY1,FS_DIAG_SAFETY2,FS_OVUVREG_STATUS.

Clear the fault error counter to “0” with consecutive good WD refresh.
Perform RSTB path check (steps 1 to 4 must be redone after RSTB is released).
Release FS0B pin.
Perform FS0B safety path check.

Re: FS26 Perform RSTB path check

JozefKozon — Mon, 24 Apr 2023 05:19:41 GMT

Dear 李永锋,

please refer to the section 21.3.7 in the FS26 datasheet. If the INTB pin generates a pulse to the MCU, then the source of the RSTB asserted, is a fault. Not a requested by the MCU through the SPI interface. The Table 136. and Table 137. shows list of INTB sources.

With Best Regards,

Jozef

Power ManagementのトピックFS26 Perform RSTB path check

FS26 Perform RSTB path check

Re: FS26 Perform RSTB path check