str912f on-chip ram size?

[rajkumar_sethi]

Posted on August 04, 2006 at 07:22

str912f on-chip ram size?

[rajkumar_sethi]

Posted on May 17, 2011 at 09:30

I am getting data abort while accessing address 0x04008000 in on-chip memory ram area. The um says that on-chip memory is 64 or 96K. Am I missing some setup to access full memory ?

Thanks

Raj

[sjo]

Posted on May 17, 2011 at 09:31

This should be in your startup code.

LDR r0, =SCRO_AHB_UMB

LDR r1, =0x0196

STR r1, [r0]

This will config 96K ram and disable the prefetch.

Regards

sjo

[rajkumar_sethi]

Posted on May 17, 2011 at 09:31

I could not locate SCRO_AHB_UMB register in the STR91xF reference manual dated April 2006. Do you have an updated version? Could you please attach it to the message or paste relevant description.

Thanks

raj

[stephane2399]

Posted on May 17, 2011 at 09:31

Did you checked the configuration of the System configuration register 0 (SCU_SCR0) in your startup code. The ram size shall be configured there.

you can have a look chapter 2.6.8 in the reference manual (p75).

raj,I couldn't find the SCRO_AHB_UMB too.

Regards,

STF

[sjo]

Posted on May 17, 2011 at 09:31

The resister is SCRO_AHB, as it is available in buffered and unbuffered areas that define just lets me know it is in unbuffered area (address 0x5C002034).

Regards

sjo