44.8 IO Pin Characteristics

Three are three different pin types with three different speeds: Backup, Normal, and High Sink (3,4,5). The Drive Strength bit is located in the Pin Configuration register PORT (PORT.PINCFG.DRVSTR).

Table 44-11. I/O Pins Common Characteristics
Symbol	Parameter	Conditions	Min.	Typ.	Max.	Units
V_IL	Input low-level voltage	V_DD=1.62V-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=1.62V-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>1.6V, I_OL max	-	0.1*V_DD	0.2*V_DD
V_OH	Output high-level voltage	V_DD>1.6V, I_OH max	0.8*V_DD	0.9*V_DD	-
R_PULL	Pull-up - Pull-down resistance	All pins excepted PA24, PA25	20	40	60	kΩ
R_PULL	Pull-up - Pull-down resistance	PA24, PA25 ⁽¹⁾	50	100	150	kΩ
I_LEAK	Input leakage current	Pull-up resistors disabled	-1	+/-0.015	1	µA

Table 44-12. I/O Pins Maximum Output Current
Symbol	Parameter	Conditions	Backup pins in Backup mode.	Backup and Normal pins	High Sink pins	Backup and Normal pins	High Sink pins	Units
Symbol	Parameter	Conditions	Backup pins in Backup mode.	DRVSTR=0		DRVSTR=1		Units
I_OL	Maximum Output low-level current	V_DD=1.62V-3V	0.005	1	2	2	4	mA
I_OL	Maximum Output low-level current	V_DD=3V-3.63V	0.008	2.5	6	6	12
I_OH	Maximum Output high-level current	V_DD=1.62V-3V	0.005	0.7	1.5	1.5	3
I_OH	Maximum Output high-level current	V_DD=3V-3.63V	0.008	2	5	5	10

Table 44-13. I/O Pins Dynamic Characteristics⁽¹⁾
Symbol	Parameter	Conditions	Backup pins in Backup mode.	Backup and Normal pins	High Sink pins	Backup and Normal pins	High Sink pins	Units
Symbol	Parameter	Conditions	Backup pins in Backup mode.	DRVSTR=0		DRVSTR=1		Units
t_RISE	Maximum Rise time	Load = 20pF, V_DD = 3.3V	2000	13	6	6	4.5	ns
t_FALL	Maximum Fall time	Load = 20pF, V_DD = 3.3V	2000	12	7	7	4.5	ns

The pins with I²C alternative mode available are compliance(2) with I²C norms. All I²C pins support Standard (Sm), Fast (Fm) and Fast plus mode (Fm+). The PB30 and PB31 pins support the High speed mode (Hs, up to 3.4MHz). The available I²C pins are listed in the I/O Multiplexing section.

Note:

These values are based on simulation. These values are not covered by test limits in production or characterization
The pins PB12, PB13 are limited on output low-level current in I2C standard mode (Sm) and Fast mode (Fm). The limitation is 2.5mA instead of 3mA for a VOL = 0.4V, and 3mA instead of 6mA for a VOL = 0.6V.
The following pins are High Sink pins and have different properties than normal pins: PA12, PA13, PA22, PA23, PA27, PA31, PB30, PB31.
The following pins are Backups pins and have different properties than normal pins: PA00, PA01, PB00, PB01, PB02, PB03, PC00, PC01.
The following digital pins are only a input pins: PC08, PC09, PC10, PC11, PC18, PC19, PC20, PC21.