T1042D4RDB - UBoot panic on alternate bank, how to switch to regular bank?

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

T1042D4RDB - UBoot panic on alternate bank, how to switch to regular bank?

867 Views
bco_sed
Contributor I

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

0 Kudos
5 Replies

859 Views
bco_sed
Contributor I

Hi,

what does U7(4) mean to you?

0 Kudos

855 Views
ufedor
NXP Employee
NXP Employee

> 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

0 Kudos

843 Views
bco_sed
Contributor I

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.

0 Kudos

838 Views
ufedor
NXP Employee
NXP Employee

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

 

0 Kudos

862 Views
ufedor
NXP Employee
NXP Employee

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).

0 Kudos