The click chip is not directly accessible from the RS 232 interface Dick, K6KR
Sent from my iPhone On Jun 24, 2010, at 12:35 PM, "David Ferrington, M0XDF" <[email protected]> wrote: > so perhaps that could be added to the Utility > 73 de M0XDF > -- > A good cook is like a sorceress who dispenses happiness. > -Elsa Schiaparelli, fashion designer (1890-1973) > > On 24 Jun 2010, at 20:11, Richard Dowling wrote: > >> The RTC IC has a low voltage detector which sets a bit in the seconds >> register. Thus (from the IC data sheet): >> >> 8.5 Voltage-low detector and clock monitor >> The PCF8563 has an on-chip voltage-low detector. When VDD drops below Vlow >> the >> VL bit (Voltage Low, bit 7 in the Seconds register) is set to >> indicate that reliable >> clock/calendar information is no longer guaranteed. The VL flag can >> only be cleared >> by software >> >> So it's easy, just software ;-) >> >> Richard >> KL0DR >> >> At 10:43 AM 6/24/2010, Brian Alsop wrote: >>> David Ferrington, M0XDF wrote: >>>> Regarding the battery, is there a way to check it's voltage or >>> projected life - without taking the cover off and measuring it? >>>> 73 de M0XDF >>> >>> Reminds me of the same suggestion implemented in a few IBM prototype >>> PC'S for the CMOS battery. They devised a circuit to go in and test it >>> many times per day. Unfortunately, the act of repeatedly testing it >>> removed enough energy to greatly shorten battery life. >>> >>> They dropped the idea. >>> >>> 73 de Brian/K3KO >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
