[U-Boot-Users] Configure the wait states
ulf at atmel.com
Mon Mar 5 10:37:30 CET 2007
>> -----Original Message-----
>> From: Ulf Samuelsson [mailto:ulf at atmel.com]
>> Sent: Friday, March 02, 2007 9:02 AM
>> It is possible to change anything in U-Boot source, but
>> I am not sure U-boot supports writing to the EBI while you are executing
>> from SDRAM
>> The bus will run the internal/external bus at a fraction of the CPU speed.
>> I believe you should be able to run the bus at 80 Mhz or so, but
>> that means that you have to reduce the CPU speed to 160 MHz
>> from 180 MHz, and I am not sure you gain anything in the process.
> Ok, my application runs at 45 MHz. Therefore I guess it's possible to laborate with the wait states value and gain speed.
> Joakim Nordell
IMHO , If you are booting from dataflash, the correct place
to fix this is in the dataflashboot.bin
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