issue with GPIO_126 line configuration and VDDS_MMC1a

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1

Hi,

We configured GPIO_126 as an input signal & we were driving logic high into this, but we were seeing "Logic low". Here is the registers settings.

1) CONTROL_PADCONF_MMC1_DAT4 (0x011c)
2) CONTROL_PBIAS_LITE ( set (3.0V) and reset(1.8V) <-- PBIASLITEVMODE1)

Tried with both setting and resetting the bit PBIASLITEVMODE1, but we were getting logic low at GPIO126. Please let us know what we suppose to do, to get logic high at GPIO126?

We have checked the voltage at VDDS_SIM(VDDS_MMC1a) it's always 0V. Please let us know to make it always ON ?

Thanks in advance,
Regards,
Ravi Holal

2

I tried using GPIO129 and could not get it to work. That is the reason I no longer use it on the -xM design. It may have something to do with the fact that the MMC interface is actually 8 bit, even though only 4 bit is being used. I know of no way. Maybe someone else does. You might check with TI and see if they can offer an explanation.

Gerald