RE: [bascom] DS1307 Real Time Clock and I2C with Bascom
Hi,
I found out that in avr some times the pull up is even not needed because of
the internal pull ups. It depends on the power supply too. And on the used
chip.
Best regards,
Mark
> -----Original Message-----
> From: owner-bascom@grote.net [mailto:owner-bascom@grote.net]On Behalf Of
> Lars Wictorsson
> Sent: zaterdag 16 juni 2001 10:42
> To: bascom@grote.net
> Subject: SV: [bascom] DS1307 Real Time Clock and I2C with Bascom
>
>
> Hi,
>
> Just a quick one...
>
> >>From what I have found out there are a few hardware catches with the
> DS1307.
> >I have got the Vbat connected to ground so it cannot float, and
> 4.7K pullup
> >resistors on the SCL and SDA lines. The 32Khz crystal is
> connected to pins
> 1
> >and 2, Still no go.
>
>
> I tested the DS1307 a while back (not in bascom though), but 4.7K
> could be to much for SDA/SCL. Try using 1K instead, since I also
> used about 5K originally and never got it to work, then I used 1K
> and it worked.
>
> /Lars
>
>
>