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Bug #1432
closedsimtrace: bootloader switch without function
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Description
The problem is that there is an internal pull-up of ~ 15k and we use an external 10k pull-down, resulting in something like 1.5Volts at the pin, which is interpreted as 'high' even without any button press.
The internal pull-up could be disabled by software, but since we're doing a hardware re-design anyway, I suggest the following alternative:- remove R15 (pull-down) completely
- attach SW2 to GND instead of 3V3
this way we have a low-active button with internal pull-up in the SAM7
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