nicolas colombain

MCF547x Interrupt latency

Discussion created by nicolas colombain on Nov 8, 2006
Latest reply on Nov 13, 2006 by nicolas colombain
In my current project, I need to relatively react quickly to an external interrupt.
After some measurements, I found that the processor needs more than 700ns after the interrupt edge to enter in the interrupt routine !!!
I have no operating system, the interrupt code/data are located in the core RAM and this interrupt has the highest priority level.
The system bus freq is 100MHz while the core frequency is 200MHz.
Any ideas ????