STM CircleOS forum / Vref value?

erazor667 · 2012-01-15 16:43:32

Hi,

in STM32F10x advanced ARM-based 32-bit MCU reference manual there's a equation which desribes DACoutput value:

DACoutput = VREF x (DOR/4095).

My question is how can I set Vref? Is it possible? If not, what is the value of it, in documentation is written that 2.4V < Vref < Vdda (3.3V)?

And my second question:
where can I find desription of 20-pin connector, how it's numerated and on which pin I can find the DAC output signal?

atitude · 2012-01-16 05:01:23

There's a lot of information available at this site. If you look at 'Resources', e.g.
http://www.stm32circle.com/resources/stm32Eprimer.php
and check out "STM32F103VE Target Board schematics", you find VREF connected to 3.1 Volt.

Similarly, you'll find the 20 pin extension connector described there in the schematics, and some of the documentation.

erazor667 · 2012-01-17 19:22:19

Thanks for help.

# 1 2012-01-15 16:43:32 Vref value?

Vref value?

# 2 2012-01-16 05:01:23 Vref value?

Re: Vref value?

# 3 2012-01-17 19:22:19 Vref value?

Re: Vref value?

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