JAJSLS2D march 2013 – april 2021 UCD3138064
PRODUCTION DATA
GPIO is referenced to DGND internally. When GPIO pins are not used connect the pins to SGND. Alternatively, they can be configured as output pins and set as low in the firmware. When GPIOs are used to drive other circuit like LED, be aware that traces can pick up noise. A local resistor close to the signal receiver (like LED) is used to terminate the coupled noise. If the big voltage swings, clamping diodes are needed for GPIO inputs, as shown in Clamping Diodes for GPIO.