DATA_Abort exception

[OmarPighi]

Hi,

i'm accessing a chip on the WEIM external bus, it is an asyncoronous access red and write of course.

Due to a problem on that chip in some situation the wait signal (DTACK) stay asserted for a long time, after 1024 AHBCLK cycle I should have a data_abort exception on the ARM, but sometimes instead to have such exception i have a prefetch abort exception.... 

Any idea? 

it seems to be random... when i have the long wait i can have both exception....

Thanks

[JerryFan]

If image(.text section) included in the WEIM(ie. the pc(R15) will access the WEIM) and the WEIM external bus is not stable,  the prefetch abort is expected.