46.9 I/O Pin Characteristics

There are two different 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 46-11. I/O Pins Common Characteristics
Symbol Parameter Conditions Min. Typ. Max. Units
VIL Input low-level voltage VDD=1.62V-2.7V - - 0.25*VDD V
VDD=2.7V-3.63V - - 0.3*VDD
VIH Input high-level voltage VDD=1.62V-2.7V 0.7*VDD - -
VDD=2.7V-3.63V 0.55*VDD - -
VOL Output low-level voltage VDD>1.62V, IOL max - 0.1*VDD 0.2*VDD
VOH Output high-level voltage VDD>1.62V, IOH max 0.75*VDD 0.85*VDD -
RPULL Pull-up - Pull-down resistance 20 40 63 kΩ
ILEAK Input leakage current Pull-up resistors disabled -1 ±0.015 1 µA
Table 46-12. I/O Pins Maximum Output Current
Symbol Parameter Conditions Normal Pins High Sink Pins(2) Normal Pins High Sink Pins(2) Units
DRVSTR=0 DRVSTR=1
IOL Maximum Output low-level current VDD=1.62V-3V 1 2 2 4 mA
VDD=3V-3.63V 2.5 6 6 12
IOH Maximum Output high-level current VDD=1.62V-3V 0.7 1.5 1.5 3
VDD=3V-3.63V 2 5 5 10
Table 46-13. I/O Pins Dynamic Characteristics(1)
Symbol Parameter Conditions Normal Pins High Sink Pins(2) Normal Pins High Sink Pins(2) Units
DRVSTR=0 DRVSTR=1
tRISE Maximum Rise time VDD=3.3V, load=20 pF, 10%/90% 13 6 6 4.5 ns
tFALL Maximum Fall time VDD=3.3V, load=20 pF, 10%/90% 12 7 7 4.5

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

Note:
  1. These values are based on simulation. They are not covered by production test limits or characterization.
  2. The following pins are High Sink pins and have different properties than normal pins: PA16, PA17, PA22,PA23, and PA31.