Buffered and non-buffered access on an ARM9 chip

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Jos Brink

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Hi there,

I'm trying to understand the ARM9 core. Can someone explain me the difference and the use of these two memory accesses. I'm reading the STR91 datasheet and i see multiple addresses for the same peripheral. What's the idea behind this?

Thank you for your time.

Micha
 

The Non Buffered memory address will not reflect the correct value if you do a write immedialy followed by a read. The Buffered address will.

Due to the pipline structure.

Get the Hitec STR9 Insider book from the ST site , there is a good explanation.

/Bingo
 

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