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CCS/AM3358: MMC boot issue

Part Number: AM3358
Other Parts Discussed in Thread: TMDSEMU110-U

Tool/software: Code Composer Studio

Dear all.

I desinged coustom board reference Beaglebone.

Q1) I have XDS110 Debug Probe (TMDSEMU110-U). Is it possilbe that flash writing in new eMMC (KINGSTON : EMMC04G-S100-A08)?

Q2) My custom board status is now

 - emmc uboot ok

 - character 'c' ok

 - sd card boot fail

i checked signal of MMC0 line as showing picture

firstime, it is detected some singal for shortime and then it is no response and signal. Console is nothing display.

how can i more checked my custom board? please advice for me.