> set the PSA bit then the WDT is routed though both prescalers (maybe > calling it a post scaler would be more appropriate) When applied to WDT it IS called a post-scaler. MC say something like "for simplicity the post-scaler [the counter shared by WDT and TMR] is hereafter referred to as pre-scaler" -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist