LS1027A - SD card boot

[Mietto]

Hello,

We have developed a custom board with the LS1027A, but we can't get it to boot with the SD Card.

The LS1027A is set to 1.8V at the EVDD pin, meaning the SDIO interface is always at 1.8V, unlike the NXP dev kit, which is set to 3.3V. Then, in our board, we have a 1.8V/3.3V level translator to interface with the SD card, but that should be transparent to the LS1027A.

We can see activity in and out from the SD card, but the boot stops at some point.

Is the LS1027A able to reliably boot from SD card when the interface is at 1.8V?

The question comes from the recommendation below, taken from AN12028.

 Best regards.

[Mietto]

Hi,

Thanks for the reply.

We discovered that the boot problem is in a different part related to the DDR4.

So from our testing, the LS1027A can boot with 1.8V at the EVDD pin (and SDIO pins) without issues.

Best regards.

[yipingwang]

Confirming with the AE team.