From: Ulf Samuelsson <ulf@atmel.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Configure the wait states
Date: Mon, 5 Mar 2007 10:37:30 +0100 [thread overview]
Message-ID: <026001c75f09$f1737ad0$d389fea9@atmel.com> (raw)
In-Reply-To: 1172843556.a240927cTDE02003@stud.mah.se
>> -----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.
>
> 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
next prev parent reply other threads:[~2007-03-05 9:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-02 13:52 [U-Boot-Users] Configure the wait states JOAKIM NORDELL
2007-03-05 9:37 ` Ulf Samuelsson [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-03-02 6:57 JOAKIM NORDELL
2007-03-02 8:01 ` Ulf Samuelsson
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