34.8 I/O Pin Characteristics

Normal I/O Pins

Table 34-11. Normal I/O Pin Characteristics
Symbol	Parameter	Conditions	Min.	Typ.	Max.	Units
R_PULL	Pull-up and Pull-down resistance	-	20	40	60	kΩ
V_IL	Input low-level voltage	V_DD = 2.7V-3.63V	-	-	0.3*V_DD	V
V_IH	Input high-level voltage	V_DD = 2.7V-3.63V	0.55*V_DD	-	-
V_OL	Output low-level voltage	V_DD > 2.7V, I_OLmax.	-	0.1*V_DD	0.2*V_DD
V_OH	Output high-level voltage	V_DD > 2.7V, I_OHmax.	0.8*V_DD	0.9*V_DD	-
I_OL	Output low-level current	V_DD = 2.7V-3.63V, PORT.PINCFG.DRVSTR = 0	-	-	2.5	mA
I_OL	Output low-level current	V_DD = 2.7V-3.63V, PORT.PINCFG.DRVSTR = 1	-	-	10
I_OH	Output high-level current	V_DD = 2.7V-3.63V, PORT.PINCFG.DRVSTR = 0	-	-	2
I_OH	Output high-level current	V_DD = 2.7V-3.63V, PORT.PINCFG.DRVSTR = 1	-	-	7
t_RISE	Rise time⁽¹⁾	PORT.PINCFG.DRVSTR = 0 load = 5 pF, V_DD = 3.3V	-	-	15	ns
t_RISE	Rise time⁽¹⁾	PORT.PINCFG.DRVSTR = 1 load = 20 pF, V_DD = 3.3V	-	-	15
t_FALL	Fall time⁽¹⁾	PORT.PINCFG.DRVSTR = 0 load = 5 pF, V_DD = 3.3V	-	-	15
t_FALL	Fall time⁽¹⁾	PORT.PINCFG.DRVSTR = 1 load = 20 pF, V_DD = 3.3V	-	-	15
I_LEAK	Input leakage current	Pull-up resistors disabled	-1	+/-0.015	1	μA

Note:

These values are based on simulation and not covered by test limits in production or characterization.

I²C Pins

Refer to I/O Multiplexing and Considerations to obtain the list of I²C pins.

Table 34-12. I²C Pins Characteristics in I²C configuration
Symbol	Parameter	Condition	Min.	Typ.	Max.	Units
R_PULL	Pull-up - Pull-down resistance		20	40	60	kΩ
V_IL	Input low-level voltage	V_DD = 2.7V-3.63V	-	-	0.3*V_DD	V
V_IH	Input high-level voltage	V_DD = 2.7V-3.63V	0.55*V_DD	-	-
V_HYS	Hysteresis of Schmitt trigger inputs		0.08*V_DD	-	-
V_OL	Output low-level voltage	V_DD > 2.7V I_OL = 3 mA	-	-	0.4
I_OL	Output low-level current	V_OL = 0.4V	3	-	-	mA
I_OL	Output low-level current	V_OL = 0.6V	6	-	-	mA
f_SCL	SCL clock frequency		-	-	400	kHz

I²C pins timing characteristics can be found in SERCOM in I²C Mode Timing.

XOSC Pin

The XOSC pins behave as normal pins when used as normal I/Os. For additional information, refer to the Table 32-12.

XOSC32 Pin

The XOSC32 pins behave as normal pins when used as normal I/Os. For additional information, refer to the Table 32-12.

External Reset Pin

The External Reset pin has the same electrical characteristics as normal I/O pins. For additional information, refer to the Table 32-12.

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