CCS/TMS570LS0432: TPS65381 RESET problem

whong zhao

Genius 4190 points

Part Number: TMS570LS0432

Tool/software: Code Composer Studio

Hello

I see the When TPS65381 RESET ,the VDDX=RAMPING, if that, is the ram of cpu clear？ Is it hot start or cold start

over 5 years ago

0 QJ Wang over 5 years ago

TI__Guru**** 199216 points

If you mean nRES signal on TPS65381. Normally this pin is connected to MCU nPORRST. When nRES is active, the MCU is in nPORRST state, and all the content in RAM is cleared.

If you mean the "Reset State" of TPS65381, the MCU RAM is also cleared since the nRES is active during "Reset State".

0 whong zhao over 5 years ago in reply to QJ Wang

Genius 4190 points

Hello

if a Global uint32 reset_cnt ，When nRES is active, the MCU is in nPORRST state, and all the content in RAM is cleared.

the reset_cnt is clear?

0 QJ Wang over 5 years ago in reply to whong zhao

TI__Guru**** 199216 points

If reset_cnt is a global variable in MCU, and if nRES is connected to nPORRST of MCU, the content in RAM including reset_cnt will be cleared

0 whong zhao over 5 years ago in reply to QJ Wang

Genius 4190 points

Hello

I want to know what reason cause cpu reset for example VMON or watchdog or poweron..

Do it use this function ？SL_Init_ResetReason();

or other methods？

0 whong zhao over 5 years ago in reply to whong zhao

Genius 4190 points

Hello

Is there any flash, power off start the data is cleared, but the watchdog restart the data is not cleared

0 QJ Wang over 5 years ago in reply to whong zhao

TI__Guru**** 199216 points

The CPU reset is caused by the CPU self-test controller (LBIST). VMON and WatchDos are not the source of the CPU reset.

The data on flash is not affected by the the PORRST.

This device has SRAM INIT feature which clears all the SRAM. In system_startup.c, the memory init is called after watchdog reset, the RAM should be cleared too.

0 whong zhao over 5 years ago in reply to QJ Wang

Genius 4190 points

Thank you

I think about the ways,How to record abnormal reset

Arm-based microcontrollers

Arm-based microcontrollers forum

CCS/TMS570LS0432: TPS65381 RESET problem