KIC8462852 EPIC204278916

Power-on strap autodetect, Was: STM32F0xx findings

Discussion created by KIC8462852 EPIC204278916 on Feb 25, 2017
Latest reply on Feb 25, 2017 by KIC8462852 EPIC204278916
Branched from an earlier discussion

The autodetect method seems to me a bit challenging.

On graphics cards they put external pull-ups/pull-downs that are sensed after reset prior to be used as output.

Another way is to use an analog pin and with a resistor divider various predefined configurations can be selected (no autodetect here)

 

I wonder if the LED grounds, replaced by 1 or more GPIO as push pull output could make a different autodetect scheme (the number of GPIO depends on the max current of the LEDs). Then the ground can be disconnected or moved high/low for another way to run an autodetection without ADC?

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