as mentioned above, ARM Cortex-M0's HPROT[3] signal tell you if the data on the bus is cacheble or not. How is it decided by the MC?
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It is decided based on the address used.
The documentation is your friend. Specifically http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0497a/CIHDHAEF.html.
unixsmurf
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Thank you so much. I'm new to reading up documentation,so couldnt figure out where to look in that fat manual :D – Gaurav Suman Sep 27 '12 at 06:03