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Forum Index : Microcontroller and PC projects : RTC problem with a CGColorMax1

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f1fco

Senior Member

Joined: 18/03/2012
Location: France
Posts: 155

Posted: 05:32am 13 May 2016

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I own a CGColorMax1 with firmware 4.5 (mm.ver -> 4.05)
but I cannot have the RTC
if I update date and time (DATE$="13/05/16" and TIME$="17:00:00", I lost date and time when I shutdown power supply

I not have the message under the Maximite logo saying that the clock is not set
why ???
is it a special version of firmware for the CGColorMax1 ?

please, help me

Pierre, from Nimes, south of France

73s de F1FCO

f1fco

Senior Member

Joined: 18/03/2012
Location: France
Posts: 155

Posted: 05:48am 13 May 2016

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curious, on my board the +5v is only 3.98 V !
with a scope, I have not the 32768 Hz oscillations on pins 1 and 2 of the DS1307

and of course no signals on SDA/SCL outputs

Pierre.

73s de F1FCO

Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3303

Posted: 05:52am 13 May 2016

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Do you have a backup battery installed? The RTC will not work without it, even when powered normally.

Geoff

Geoff Graham - http://geoffg.net

f1fco

Senior Member

Joined: 18/03/2012
Location: France
Posts: 155

Posted: 06:08am 13 May 2016

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the BR1225 battery is on the board
3.27V
and also 3.27V on the pin 3 of DS1307

73s de F1FCO

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