Dear Sir ,
I want to develop rtc circuit with battery backup in lpc2106.
I have not used any external components for rtc circuit.
But for battery backup , should I connect coin cell supply to the Vdd1.8 (
core ) pin of LPC2106 ?
Or Should I connect coin cell supply to vdd3-1 & vdd3-2 pin of LPC2106 ?
Depending on that I have to decide the coin cell voltage rating and part
no.?
Or any one can suggest me , which coin cell will be better for the same ?
Expecting the reply.
Thanks and Best Regards
Pramod
LPC 2106 - RTC Battery backup
Started by ●September 12, 2006
Reply by ●September 12, 20062006-09-12
Pramod Wani wrote:
>
> Dear Sir ,
>
> I want to develop rtc circuit with battery backup in lpc2106.
>
> I have not used any external components for rtc circuit.
>
> But for battery backup , should I connect coin cell supply to the
> Vdd1.8 (
> core ) pin of LPC2106 ?
>
> Or Should I connect coin cell supply to vdd3-1 & vdd3-2 pin of LPC2106 ?
>
> Depending on that I have to decide the coin cell voltage rating and part
> no.?
>
> Or any one can suggest me , which coin cell will be better for the same ?
>
There are a lot of evaluation LPC2000 boards for sale out there on the
net, most of them have schematics. I suggest that you start with google
and begin looking at them.
TomW
--
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net http://cyberiansoftware.com http://openzipit.org
"Windows? No thanks, I have work to do..."
----------------
>
> Dear Sir ,
>
> I want to develop rtc circuit with battery backup in lpc2106.
>
> I have not used any external components for rtc circuit.
>
> But for battery backup , should I connect coin cell supply to the
> Vdd1.8 (
> core ) pin of LPC2106 ?
>
> Or Should I connect coin cell supply to vdd3-1 & vdd3-2 pin of LPC2106 ?
>
> Depending on that I have to decide the coin cell voltage rating and part
> no.?
>
> Or any one can suggest me , which coin cell will be better for the same ?
>
There are a lot of evaluation LPC2000 boards for sale out there on the
net, most of them have schematics. I suggest that you start with google
and begin looking at them.
TomW
--
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net http://cyberiansoftware.com http://openzipit.org
"Windows? No thanks, I have work to do..."
----------------