TPS65313-Q1: Reset function

The WAKE PIN and Power supply for TPS65313 is keeping no change during TPS65313  reset.

We just want TPS65313 to shut off the output(VBUCK1,VBUCK2,VBOOST) for a while, then output again.

Hi WZ,

Couple things you can try:

1. Before using the CLR_WAKE_LATCH command pull the WAKE pin low

2. Disable auto start by setting AUTO_START_DIS to '1' 

regards,

Niko 

OK. One question:

Before using the CLR_WAKE_LATCH command pull the WAKE pin low, will the TPS65313 reset?

Due to I can control the WAKE pin to low, but then when TPS65313 enter into off state by CLR_WAKE_LATCH.

C2000 MCU is no power any more.  The WAKE PIN will relay on other hardware circuit such as CAN Wakeup to set WAKE pin to high again, then C2000 MCU will be powered.

This is not reset, this is sleep. It will relay on other hardware circuit such as CAN Wakeup to wake.

Hi WZ,

This will power down the device to the OFF state. If this is not viable option then you can try the option 2. So first set the AUTO_START_DIS to '1' and then perform CLR_WAKE_LATCH command.

regards,

Niko

Does this option2 described in datasheet？

I would like to check the timing ralated points，such as how long will the output power（VBUCK1,VBUCK2,VBOOST）keep disabled，and how long the output power will recover。

Hi WZ,

this is described in the section you showed the screenshot of. (8.13.1 OFF state).

regards,

Niko 

i checked this chapter.

Your suggestion option2, accdoring to the datasheet.

I cannot reset.

Need a new rising edge is detected at the WAKE pin. I cannot offer this condtion, just want TPS65313 reset like C2000 DSP software reset or watchdog reset, it shall reboot itself.

Thanks a lot. This is critical change of our project.

Sorry I use the phone，wrong click to the resolved button.

Hi WZ,

understood. I am still looking into this and trying to get results in the beginning of next week.

regards,

Niko 

Hi WZ,

sorry for taking time on this. I am still looking into this. Expect a reply tomorrow or early next week.

regards,

Niko

I am still following this question.

Hi WZ,

sorry for the late reply. Now I have access to an EVM so I can test this. I am trying to get an answer today.

regards,

Niko

Hi WZ,

the best way would be to go to OFF state by CLR_WAKE_LATCH and by toggling the wake pin enable the regulators again. There is no other dedicated sequence for this. Other possible way could maybe be by using the MCU_RST_RQ command. This command requests the PMIC to toggle the NRES pin low and back to high.

regards,

Niko

W Z said:

Need a new rising edge is detected at the WAKE pin. I cannot offer this condtion

I cannot offer this condition.

Niko Alatalo said:

Other possible way could maybe be by using the MCU_RST_RQ command. This command requests the PMIC to toggle the NRES pin low and back to high.

I will try this CMD, have you already tried with EVM.

Hi WZ,

this command pulls the nRES pin low and back high again to reset the MCU which I have tested on the EVM.

regards,

Niko