Dear all, we design new iMX6Q board based on sabresd prototype. But we encountered boot up failure issue.
- MX6Q Design is based on MMPF0100F0+MX6Q ;
- All power rails are checked properly and as expected;
- 24MHz and 32kHz clock sources both work;
- BOOT_MODE1 and BOOT_MODE0 default is set at 10 which should be internal boot mode;
Connect usb cable to PC ,since it's raw board it should populate USB HID device on PC. Unfortunately,we see nothing on PC;
We tried to change BOOT_MODE cfg to 01 (serial downloader mode), Nothing happened on PC;
We change BOOT_MODE cfg to 00 ,HID device populated on PC and MFG tool can flash eMMC device without error. But after resumed to 10 BOOT_MODE, my board can't boot up.
My question is,Why in serial downloader or internal boot mode ,no HID device populated on PC;
What other check list we missed? Please help!