STM CircleOS forum / Clocks vs battery

pinstripe · 2010-11-19 16:20:13

I have a problem where everything works fine while running from USB power (either connector) but not after restarting from battery.

At first I just got white screen but this could be fixed by setting flash waitstate to 1 or 2. However the measured UART rate indicates that the processor is running on 60MHz instead of desired 20MHz. And only when running off battery.

I have tested on different Primer2s and the problem seems to exists on some but not others.

yrt · 2010-11-19 16:46:54

Hi,

This problem is known.
Take a look at this page : http://www.stm32circle.com/resources/known.php#startup

Hope this helps.
Yves

# 1 2010-11-19 16:20:13 Clocks vs battery

Clocks vs battery

# 2 2010-11-19 16:46:54 Clocks vs battery

Re: Clocks vs battery

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