[U-Boot-Users] ERROR: Cannot determine a common read delay

k b k_bisla at hotmail.com
Thu Nov 30 22:14:50 CET 2006

I'm using a board similar to ecotea
here's the initial prompt.
So initailly it had 256 mb ddr sdram. now i want to use 512 ddr sdram.
i put that part in and now i get this error.

the error is generated in program_tr1() in cpu/ppc4xxx/spd_sdram.c
here are some questions
1) what exactly is this program tr doing. i guess cp
2) Can someone gimme any pointers as to what's that problem here.
3) why isn't program_tr0 used at all ?

Any inputs are appreciated,


AMCC PowerPC 440 UNKNOWN (PVR=51b21894)
Board: Dolby DSP100 AMCC 440GX
        VCO: 800 MHz
        CPU: 800 MHz
        PLB: 100 MHz
        OPB: 50 MHz
        EPB: 50 MHz
I2C:   ready
CPLD: Interface check...OK
DRAM:  Starting memory test ....
ERROR: Cannot determine a common read delay.
### ERROR ### Please RESET the board ###

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