s32k312 Software reset time

[sensen_1]

HI

Using the watchdog/power management module of s32k312 for reset, but the reset time is too long, taking 4ms, and cannot respond to the upper computer information refreshed by UDS boot in a timely manner, resulting in the final error. Is there any way to speed up the reset time?

[Julián_AragónM]

Hi @sensen_1,

How are you triggering the reset? Using Power_Ip_PerformReset() API, I can see the RESET_b line toggling every 2.7ms, which matches with the Data Sheet's value for boot time with no HSE FW installed:

Of course, full startup and peripheral initialization also add to the boot time.

If you have HSE firmware installed, S32K3 adds SBAF and Firmware initialization upon booting. This is described in 6.1.3 Boot time, HSE firmware installed.

Best regards,
Julián

[sensen_1]

HI,JULIAN：
I tried using the following two functions to perform a reset operation in the boot code. After the final reset, it takes about 4.5ms to jump to the app program. Can installing HSE firmware solve this problem?
Power_Ip_MC_ME_SocTriggerResetEvent(POWER_IP_FUNC_RESET_MODE);
Swt_Ip_SetTimeout(0,3,0);