I/O Pin Characteristics

The following are two I/O pin types with three different speeds: Normal and High Sink.

The Drive Strength bit is located in the Pin Configuration register of the PORT (PORT.PINCFG.DRVSTR).

Table 1. I/O Pins Common Characteristics
Symbol	Parameter	Conditions	Min.	Typ.	Max.	Units
V_IL	Input low-level voltage	V_DD=1.8V-2.7V	-	-	0.25*V_DD	V
V_IL	Input low-level voltage	V_DD=2.7V-3.63V	-	-	0.3*V_DD
V_IH	Input high-level voltage	V_DD=1.8V-2.7V	0.7*V_DD	-	-
V_IH	Input high-level voltage	V_DD=2.7V-3.63V	0.55*V_DD	-	-
V_OL	Output low-level voltage	V_DD>1.8V, I_OL max.	-	0.1*V_DD	0.2*V_DD
V_OH	Output high-level voltage	V_DD>1.8V, I_OH max.	0.7*V_DD	0.8*V_DD	-
R_PULL	Pull-up - Pull-down resistance		20	40	63	kΩ
I_LEAK	Input leakage current	Pull-up resistors disabled	-1	±0.015	1	µA

Table 2. I/O Pins Maximum Output Current
Symbol	Parameter	Conditions	Normal Pins	High Sink Pins⁽¹⁾	Normal Pins	High Sink Pins⁽¹⁾	Units
Symbol	Parameter	Conditions	DRVSTR=0		DRVSTR=1		Units
I_OL	Maximum Output low-level current	V_DD=1.8V-3V	1	2	2	4	mA
I_OL	Maximum Output low-level current	V_DD=3V-3.63V	2.5	6	6	12
I_OH	Maximum Output high-level current	V_DD=1.8V-3V	0.7	1.5	1.5	3
I_OH	Maximum Output high-level current	V_DD=3V-3.63V	2	5	5	10

Note:

1.The following pins are High Sink pins and have different properties than the normal pins: PA16, PA17, PA22, PA23, and PA31.