Other Parts Discussed in Thread: AM5718
Hi,
We use to boot Linux form SD card slot in AM5718 idk evm. Off late we are unable to boot from SD card slot. We have multiple EVM boards and the same sd card boots on other AM5718idks
One particular Idk has this issue.
We have burned uboot to QSPI and Kernel to eMMC on same idk. In this case we can comfortably boot Linux. So I guess Board has as such no issue other than SD card.
If in insert SD card and try to boot even uboot does not show up. So i guess it still running ROMBoot loader.
I have tested continuity of SD card contact pins to R402,403,404,405,406,407 and they are intact. On power up CMD, DAT1,DAT2,DAT3,DAT4 are pulled up to VSDMMC (3.3V). I have cross checked 10K pullup resistance too. Also tested the functionality of card detect (CD). For bringing up uboot do we need this feature??
As i understand VSDMMC = 3.3V is default value fetched by PMIC and ROMBoot loader does not change it.
Is there any other dependency for SD card boot (uBOOT---> Linux)??