We have our own PCB with C6A8168.
We try to boot from SD card. All topics about problems with booting from SD card on this forum we have read.
Description of problem:
1. All powers are good.
2. RESET_OUT is high - that means what processor exit from POR.
3. Clock on SD_CLK is good, we compared it with clock on EVM.
We can't get any information from UART. All UART's TXD pins have 3.3V.
Can anybody answer about state of processor when it try to load from SD, but can't do it and UART's TXD has 3.3V?
Another question is about temperature of processor while booting. Is it good to be quite warm while trying to boot?
Thank you.
Looking forward your answers!
Sergej.