Thanks a lot, Jinx. I=B4m reading AN607 now. Bye.- ----- Original Message ----- From: "Jinx" To: Sent: Thursday, February 14, 2002 11:56 PM Subject: Re: [PIC] Power up time on 16F628 > > 2- 16F628 + 4mhz XTAL > > In that AN607 I pointed you to, there's a little something > that may help you decide > > Under Table 3, page 3 it says > > "32kHz crystals have a typical start-up time of 1-2 seconds. > Crystals >100kHz have a typical start-up time of 10-20ms. > Resonators are typically <1ms" > > However, I'd want independent verification that the crystal > I was using takes that long to get revved up > > In Table 3, start-up time for the PIC itself is shown as 1024 > Tosc whether it be crystal or resonator > > So, if it's true you have an unavoidable overhead of at least > 10ms when using a crystal, change to a resonator if possible > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body