Subject: Re: QUESTION: real-time, interrupt latency & atom process
To: Alfred Perlstein <>
From: Jukka Marin <>
List: tech-kern
Date: 11/15/2001 11:58:15
On Thu, Nov 15, 2001 at 10:53:06AM +0100, Reinoud Zandijk wrote:
> Bit offtopic but in contrast the ARM processor series only have an
> interrupt latency of a 2 +branch for a normal IRQ or even 1 at most for a
> special FIQ...

Hmm?  I was looking at one ARM based MCU recently and according to the
datasheet, interrupt latency could be as high as 80 Ás (!!!!) under some
circumstances (with "slow" DRAM, 16-bit bus etc).  (This was a chip made
by Crystal..)