Apptech wrote: >> How often do you need to verify program memory at Vdd >> limits? > > Depends on the value of 'need'. > > For ' ... should ... ' it's any time you are producing > something that you want to be certain to meet spec in a > given environment. Russell, you like to take my words out of context. :) If you read the post again, you will see that the statement you quoted applies only to development. Why would you want to run the Vdd test every time you do a compile/program cycle? If you mean to suggest that I advocate not running the test during production programming, you are attacking a straw man. Vitaliy -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist