I am assuming that the GPIO ports are 3.3V High but I can’t find characteristics / specs of the GPIO.
How can I verify the TTL levels based on documentation?
Board specs V4: http://espressobin.net/wp-content/uploads/2017/02/ESPRESSObin_V4_Schematics.pdf
GPIO map: https://www.kickstarter.com/projects/874883570/marvell-espressobin-board/description
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