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Otto Winter 2019-01-18 15:02:58 +01:00
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@ -91,6 +91,35 @@ Special Pins
used as analog input pin
=================== =============================================
This means effectively only the following pins can be used as general purpose GPIO:
.. table::
:class: no-center
========== ==============================
**Pin** **Restrictions**
---------- ------------------------------
``GPIO0`` If HIGH on boot
---------- ------------------------------
``GPIO2`` If HIGH on boot
---------- ------------------------------
``GPIO4``
---------- ------------------------------
``GPIO5``
---------- ------------------------------
``GPIO6``
---------- ------------------------------
``GPIO12``
---------- ------------------------------
``GPIO13``
---------- ------------------------------
``GPIO14``
---------- ------------------------------
``GPIO15`` If LOW on boot
---------- ------------------------------
``GPIO16`` Does not have internal pullup
========== ==============================
Boot Modes
----------