Hi,
My customer has some questions when using this EVM. Since I'm really not familiar with the EVM, please help with it.
Customer wants to know how to change the power for SD card from VDD_SD_DV_ALT to VDD_SD_DV_REG. They have tried to solder down R465 and solder R464. But they found the system can't work normally. They tested the output of VDD_SD_DV_ALT and found that it was 3.3V when powering up and then changed to 1.8V. And the VDD_SD_DV_REG is a stable 3.3V output.
Customer thought that was the difference which caused the system failure after changing the power from the dual channel LDO to the PMIC LDO. We know that the output voltage of PMIC LDO can be changed by the register. But customer wants to know why there will be changed voltage from 3.3V to 1.8V with the VDD_SD_DV_ALT power. And how can they change the power for SD card from VDD_SD_DV_ALT to VDD_SD_DV_REG?
Thanks,
Andrew
