Configure the wait states
Quoted 11 lines
-----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 SDRAMThe 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.
Greetings
Joakim Nordell
Quoted 14 lines
Quoted 9 lines
-----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 SDRAMQuoted 4 lines
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.
Quoted 4 lines
Ok, my application runs at 45 MHz. Therefore I guess it's possible to laborate with the wait states value and gain speed.
Greetings
Joakim Nordell
IMHO , If you are booting from dataflash, the correct place to fix this is in the dataflashboot.bin
Best Regards
Ulf Samuelsson