31.9 I/O Specifications

Table 31-11. I/O Pin AC/DC Electrical Specifications ⁽⁷⁾
AC/DC CHARACTERISTICS			Standard Operating Conditions: VDDIO = AVDD = VDD 1.62V to 3.63V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
DI_1	VIL	Input Low- Voltage I/O Pins	GND	—	0.25*VDD	V	1.62V ≤ VDD ≤ 2.7V
DI_1	VIL	Input Low- Voltage I/O Pins	GND	—	0.3*VDD	V	2.7V ≤ VDD ≤ 3.63V
DI_3	VIH	Input High Voltage	0.7*VDD	—	VDD	V	1.62V ≤ VDD ≤ 2.7V
DI_3	VIH	Input High Voltage	0.55*VDD	—	VDD	V	2.7V ≤ VDD ≤ 3.63V
DI_5	VOL	Output Low Voltage (Standard pins and I²C pins in GPIO mode, Low Drv Strength, DRVSTR = 0)	—	—	0.2*VDD	V	IOL (1.62V ≤ VDD <3V) = 1 mA IOL (3V ≤ VDD ≤ 3.63V) = 2.5 mA
DI_7	VOL	Output voltage low (Standard pins and I²C pins in GPIO mode, High Drv Strength, DRVSTR = 1)	—	—	0.2*VDD	V	IOL (1.62V ≤ VDD <3V) = 3 mA IOL (3V ≤ VDD ≤ 3.63V) =10 mA
DI_9	VOH	Output High Voltage (Standard pins and I²C pins in GPIO mode, Low Drv Strength, DRVSTR = 0)	0.8*VDD	—	—	V	IOH (1.62V ≤ VDD <3V) = 0.7 mA IOH (3V ≤ VDD ≤ 3.63V) = 2 mA
DI_11	VOH	Output High Voltage (Standard pins and I²C pins in GPIO mode, High Drv Strength, DRVSTR = 1)	0.8*VDD	—	—	V	IOH (1.62V ≤ VDD <3V) = 2 mA IOH (3V ≤ VDD ≤ 3.63V) = 7 mA
DI_13	IIL	Input Pin Leakage Current	-1	—	1	µA	GND ≤ VPIN ≤ 3.63V (VPIN = Voltage present on Pin)
DI_15	RPDWN	Internal Pull-Down (DIR = OUT = 0, PULLEN = 1)	20	—	60	kΩ	1.62V ≤ VDD ≤ 3.63V
DI_17	RPUP	Internal Pull-Up (DIR = 0, OUT = PULLEN = 1)	20	—	60	kΩ	1.62V ≤ VDD ≤ 3.63V
DI_19	IICL^{(1, 3, 4)}	Input Low- Injection Current	-1	—	—	mA	This parameter applies to all I/O pins.
DI_21	IICH^(2,3,4)	Input High Injection Current	—	—	1	mA	This parameter applies to all I/O pins.
DI_23	∑IICT	Total Input Injection Current (sum of all I/O and control pins) Absolute value of \| ∑IICT \|	-45	—	45	mA	Absolute instantaneous sum of all ± input injection currents from all I/O pins. ( \| IICL \| + \| IICH \| ) ≤ ∑IICT
DI_25	TRISE	I/O Pin Rise Time (Standard pins, Low Drv Strength, DRVSTR = 0)⁽⁵⁾	—	—	14	ns	VDD = 3.3V , CLOAD = 20 pF(max)⁽⁶⁾
DI_25	TRISE	I/O Pin Rise Time (Standard pins, High Drv Strength, DRVSTR = 1)⁽⁵⁾	—	—	7	ns	VDD = 3.3V , CLOAD = 20 pF(max)⁽⁶⁾
DI_27	TFALL	I/O pin Fall Time (Standard pins, Low Drv Strength, DRVSTR = 0)⁽⁵⁾	—	—	14	ns	VDD = 3.3V , CLOAD = 20 pF(max)⁽⁶⁾
DI_27	TFALL	I/O pin Fall Time (Standard pins, High Drv Strength, DRVSTR = 1)⁽⁵⁾	—	—	7	ns	VDD = 3.3V , CLOAD = 20 pF(max)⁽⁶⁾
Note: VIL source < (GND - 0.6). Characterized but not tested. 3.6V < VIH source ≤ 4.2V. If the sum of all injection currents are > \| ∑IICT \| it can affect the ADC results by approximately 4 to 6 counts (i.e., VIH Source > (VDDIO + 0.6) or VIL source < (GND -0.6)). Any number and the combination of I/O pins not excluded under IICL or IICH conditions are permitted provided the absolute instantaneous sum of the input injection currents from all pins do not exceed the specified ∑IICT limit. To limit the injection current the user must insert a resistor in series RSERIES (i.e., RS) between the input source voltage and device pin. The resistor value is calculated accordingly: For negative Input voltages less than (GND -0.6): RS ≥ absolute value of \| ((VIL source - (GND -0.6))/IICL) \| For positive input voltages greater than (VDDIO +0.6): RS ≥ ((VIH source - (VDDIO +0.6))/IICH) For Vpin voltages > VDDIO +0.6 and < GND -0.6, then RS = the larger of the values calculated above The following pins are I²C pins and have the same properties as standard pins when not used as SERCOM I²C pins: PA08, PA09, PA12, PA13, PA16, PA17, PA22, PA23, PB12, PB13, PB16, PB17, PB30, PB31. When used in SERCOM I²C mode, refer to the I2CM_5/7 and I2CS_5/7 parameters. Rising and falling measurements given between 10% and 90%. The RESET pin has the same properties as standard GPIOs.