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I2C clock chip: PCF8583P

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kcn

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In Nigel's tutorials, he has an I2C clock board:



which uses the PCF8583P ("a real time, battery backed, CMOS I2C
clock chip in an 8 pin package").

Does anybody know of a Microchip part that does the same thing?

Is there a part (from Microchip or any other manufacturer) that is
similar, but requires even less external components?

Thank you.

kcn
 
kcn said:
In Nigel's tutorials, he has an I2C clock board:



which uses the PCF8583P ("a real time, battery backed, CMOS I2C
clock chip in an 8 pin package").

Does anybody know of a Microchip part that does the same thing?

Is there a part (from Microchip or any other manufacturer) that is
similar, but requires even less external components?

Various manufacturers make RTC's (Real Time Clocks), Dallas Semiconductor make some popular ones - have a look at DS1302 and DS1307.

But I wouldn't expect them to use much less in the way of external components, the PCF8583P already uses hardly any?.
 
Dose not work

I must be reading the data sheet wrong but I can't get the clock to start, not sure what I am doing wrong.
I am using a pre-built clock board and have the LCD hooked up and working, I tested the battery and the wire hook-ups and all that happens is it displays 00:00:00 for the time and 00/00/2000 for the date. I am using a 16F628a chip, have the watch dog turned off. thought maybe I needed to but a small delay in befor the display loop, didn't work. Just sits there. Don't know what I should be testing for.
any help would be apreciated
gogo
 
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