I/O Pin Characteristics

There are two different pin types with two different speeds: Normal and High Sink⁽²⁾. The Drive Strengh bit is located in the Pin Configuration register PORT (PORT.PINCFG.DRVSTR).

The pins with I²C alternative mode available are compliant with I²C specifications. All I²C pins support Standard (Sm), Fast (Fm), Fast plus (Fm+) and High speed (Hs) modes. The available I²C pins are listed in the I/O Multiplexing section.

Table 1. I/O Pins Common Characteristics
Symbol	Parameter	Conditions	Min.	Typ.	Max.	Units
V_IL	Input low-level voltage	VDD=2.7-4.5V	-	-	0.3*VDD	V
V_IL	Input low-level voltage	VDD=4.5-5.5V	-	-	0.3*VDD
V_IH	Input high-level voltage	VDD=2.7-4.5V	0.7*VDD	-	-
V_IH	Input high-level voltage	VDD=4.5-5.5V	0.7*VDD	-	-
V_OL	Output low-level voltage	VDD>2.7V, I_OL max	-	0.1*VDD	0.2*VDD
V_OH	Output high-level voltage	VDD>2.7V, I_OH max	0.8*VDD	0.9*VDD	-
R_PULL	Pull-up - Pull-down resistance	All pins	20	40	60	kΩ
I_LEAK	Input leakage current	Pull-up resistors disabled	-1	-	1	µA

Table 2. I/O Pins Maximum Output Current
Symbol	Parameter	Conditions	Normal pins	High Sink pins	Normal pins	High Sink pins	Units
Symbol	Parameter	Conditions	DRVSTR=0		DRVSTR=1		Units
I_OL	Maximum output low-level current	VDD=2.7V-4.5V	2.5	5	5	10	mA
I_OL	Maximum output low-level current	VDD=4.5V-5.5V	5	10	10	20
I_OH	Maximum output high-level current	VDD=2.7V-4.5V	1.5	3	3	6
I_OH	Maximum output high-level current	VDD=4.5V-5.5V	3	6	6	12

Table 3. I/O Pins Dynamic Characteristics ⁽¹⁾
Symbol	Parameter	Conditions	Normal pins	High Sink pins	Normal pins	High Sink pins	Units
Symbol	Parameter	Conditions	DRVSTR=0		DRVSTR=1		Units
t_RISE	Maximum rise time	VDD = 5.0V, load = 20pF	15	12	8	7	ns
t_FALL	Maximum fall time	VDD = 5.0V, load = 20pF	14	11	7	7	ns

These values are based on simulation. These values are not covered by test limits in production or characterization.
The following pins are High Sink pins and have different properties than normal pins: PA10, PA11, PB10, PB11.