Search by Tags

Interrupt Latency

 
Applicable for

Tags

Compare with Revision

Subscribe for this article updates

If you need really low interrupt latency you should go for installable interrupt service routines (ISR). On the PXA270 we reach latency times as less as to 10-15 us.

Delays on the T20 can vary. With disabled Dynamic Frequency Switching (DFS) running on full speed and low workload ISRs get down to 2.5-5us latency time where as ISTs get down to 10-15us. With DFS enabled ISR latency time can go up to 100us and IST latency up to 250us.

Latency times on WinCE 6 and WEC 7 are about the same.

See also the Win CE help for more information.