Bob Ammerman wrote: > ----- Original Message ----- From: "Neil Cherry" >> Dave VanHorn wrote: >>> At 09:18 AM 3/28/2005, Neil Cherry wrote: >>>> Olin Lathrop wrote: >>>>> Neil Cherry wrote: >>>>>> I'm working with external ram on an ARM processor. How do I figure >>>>>> out what # of wait states I need to use to properly access the >>>>>> memory? >>>>> Read memory data sheet to see how much time it needs. Read >>>>> processor manual to see how much time each access gets, plus how >>>>> much time each >>>>> wait state adds. Make sure total result of B meets or exceeds A. >>>> Thank! I looks like I should have followed the 'obvious'. :-) >>> With the emphasis on EXCEED. >> 'Close enough for government work' is not good enough, got it. :-) > And use the 'worst case' timings, not the 'typical' numbers!!! I hadn't thought of that (I haven't looked yet either), thanks. -- Linux Home Automation Neil Cherry ncherry@comcast.net http://home.comcast.net/~ncherry/ (Text only) http://hcs.sourceforge.net/ (HCS II) http://linuxha.blogspot.com/ My HA Blog -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist