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neil2399
neil2399
Associate III
June 3, 2005
Question

XRAM architecture question

  • June 3, 2005
  • 1 reply
  • 550 views
Posted on June 03, 2005 at 14:41

XRAM architecture question

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1 reply

neil2399
neil2399Author
Associate III
June 3, 2005
Posted on June 03, 2005 at 14:41

Hi guys.

I run a ST10F269 and have puzzling problem that I suspect might have something to do with the fact that the XRAM is accessed via the external bus controller.

I have a USB ISP routine that I execute from RAM. This routine works fine when it runs from the IRAM, but doesn’t when it runs from the XRAM. Everything works fine (erase etc.) up to where it needs to access the USB chip for the first time. After that the results are unpredictable. I have spend some time on this problem and believe that there is some conflict on the bus between the XRAM and my USB chip. Now I’m happy with running my code from the IRAM, but would still like to know how to get it working from the XRAM. Any thoughts?

Thanks

Neil

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