TPS65910: Change the VMMC slew rate by the register

Conor

Guru 12065 points

Part Number: TPS65910

Hi,

We are using TPS65910AA1RSL(R) as the power supply for DP83826IRHBR.

From the thread below, if the rising voltage of VDDIO is less than 0.5ms, an ESD protection event will occur, It is mentioned that large currents may be consumed.
DP83826I: VDDIO and VDDA3V3 voltage ramp up faster than specified

Q1.
Is there any way to change the VMMC slew rate within the spec (0.5V or more) by the register?
As far as I checked the datasheet of TPS65910, it seems that the slew rate of VCC1,2 can be changed by register.

Q2.
Regarding Q1, if the VMMC slew rate cannot be changed by register, is it appropriate to take measures using peripheral components (RC circuit)?

Thnaks,

Conor

over 1 year ago

0 Field Tolson over 1 year ago

TI__Genius 10772 points

Hi Conor,

Q1. I don't believe so. This option looks like it exists for the VDD1 and VDD2, but not for VMMC. I will try to see if I can dig into the hidden registers for VMMC and see if there may be something here, but I do not believe that there is.

Q2. This would then probably be the best way to change the slew rate, yes.

Thanks,
Field

0 Conor over 1 year ago in reply to Field Tolson

Guru 12065 points

Hi Field,

OK, I understand. Just to be sure, could you please check if there is a shadow register?

Thanks,

Conor

0 Field Tolson over 1 year ago in reply to Conor

TI__Genius 10772 points

Hi Conor,

Field Tolson said:
I will try to see if I can dig into the hidden registers for VMMC and see if there may be something here, but I do not believe that there is.

I checked some additional documentation and was unable to find anything to support this alternative method.

Thanks,
Field

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TPS65910: Change the VMMC slew rate by the register