Hi,
I made a critical mistake modifying U-Boot and installing it on the alternate bank (NOR IFC, vBank 4). The board now reboots endlessly after checking the DDR configuration. My problem is that I can't find how to force the board to switch back to the "regular" bank vBank 0. I tried to modify the switch confguration but whatever the configuration I use for sw3[5],sw3[6],sw3[7] (ie 000 or 100), the board starts on vBanK 4.
Any idea how I could switch back to vBank 0 where an un-modified U-Boot is installed?
Best regards
Hi,
what does U7(4) mean to you?
> what does U7(4) mean to you?
Schematics component.
The RDB schematics is available at:
https://www.nxp.com/design/qoriq-developer-resources/qoriq-t1040-reference-design-board:T1040RDB
I'm really sorry but I don't get it. I went through the QorIQ RDB reference manuals for T1040 and T1042 but I couldn't find about any U7. Could you point it out a little bit more accurately please? Thank you very much.
U7(4) is a hardware schematics component.
The RDB schematics is available at:
https://www.nxp.com/design/qoriq-developer-resources/qoriq-t1040-reference-design-board:T1040RDB
T1042-RDB Schematics, BOM, Gerber information and CPLD:
https://www.nxp.com/downloads/en/printed-circuit-boards/T1042D4RDB-PA_DF.zip
T1042D4RDB_revA_SCH.pdf, Sheet 5
SW3[5:7] directly select vBank address.
When SW3[6:7]=0 then SW3[5] chooses current vs alternate bank - you could check this on U7(4).