Many thanks. Martin McCormick Nigel Orr writes: >It doesn't depend on the clock source. It stops executing instructions >until it is wakened from sleep by a reset, watchdog timeout, suitable >interrupt etc, same as the newer PICs. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads