Omar Pighi

DATA_Abort exception

Discussion created by Omar Pighi on Apr 27, 2012
Latest reply on May 28, 2012 by Jerry Fan



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....