45.9 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.

The RESET_N pin has the same properties as standard GPIOs.

Table 45-14. I/O Pins Common Characteristics
Symbol Parameter Conditions Min. Typ. Max. Units
VIL Input low-level voltage VDD=2.7-4.5V - - 0.3*VDD V
VDD=4.5-5.5V - - 0.3*VDD
VIH Input high-level voltage VDD=2.7-4.5V 0.7*VDD - -
VDD=4.5-5.5V 0.7*VDD - -
VOL Output low-level voltage VDD>2.7V, IOL max - 0.1*VDD 0.2*VDD
VOH Output high-level voltage VDD>2.7V, IOH max 0.8*VDD 0.9*VDD -
RPULL Pull-up - Pull-down resistance All pins 20 40 60 kΩ
ILEAK Input leakage current Pull-up resistors disabled -1 - 1 µA
Table 45-15. I/O Pins Maximum Output Current
Symbol Parameter Conditions Normal pins High Sink pins Normal pins High Sink pins Units
DRVSTR=0 DRVSTR=1
IOL Maximum output low-level current VDD=2.7V-4.5V 2.5 5 5 10 mA
VDD=4.5V-5.5V 5 10 10 20
IOH Maximum output high-level current VDD=2.7V-4.5V 1.5 3 3 6
VDD=4.5V-5.5V 3 6 6 12
Table 45-16.  I/O Pins Dynamic Characteristics (1)
Symbol Parameter Conditions Normal pins High Sink pins Normal pins High Sink pins Units
DRVSTR=0 DRVSTR=1
tRISE Maximum rise time VDD = 5.0V, load = 20pF 15 12 8 7 ns
tFALL Maximum fall time VDD = 5.0V, load = 20pF 14 11 7 7
Note:
  1. These values are based on simulation and are not covered by test limits in production or characterization.
  2. The following pins are High-Sink pins and these pins have different properties than normal pins: PA10, PA11, PB10, PB11.