46.8 I/O Pin Characteristics

There are three different pin types with three different speeds: Backup, Normal, and High Sink(3,4).

The Drive Strength bit is located in the Pin Configuration register of the PORT (PORT.PINCFG.DRVSTR).

Table 46-10. I/O Pins Common Characteristics
SymbolParameterConditionsMin.Typ.Max.Units
VILInput low-level voltageVDD=1.62V-2.7V--0.25*VDDV
VDD=2.7V-3.63V--0.3*VDD
VIHInput high-level voltageVDD=1.62V-2.7V0.7*VDD--
VDD=2.7V-3.63V0.55*VDD--
VOLOutput low-level voltageVDD>1.6V, IOL max-0.1*VDD0.2*VDD
VOHOutput high-level voltageVDD>1.6V, IOH max0.8*VDD0.9*VDD-
RPULLPull-up - Pull-down resistanceAll pins except PA24, PA25204060kΩ
PA24, PA25(1)50100150
ILEAKInput leakage currentPull-up resistors disabled-1+/-0.0151µA
Table 46-11. I/O Pins Maximum Output Current
SymbolParameterConditionsBackup Pins in Backup Mode(4)Backup and Normal Pins(4)High Sink Pins(3)Backup and Normal Pins(4)High Sink Pins(3)Units
DRVSTR=0DRVSTR=1
IOLMaximum Output low-level currentVDD=1.62V-3V0.0051224mA
VDD=3V-3.63V0.0082.56612
IOHMaximum Output high-level currentVDD=1.62V-3V0.0050.71.51.53
VDD=3V-3.63V0.00825510
Table 46-12. I/O Pins Dynamic Characteristics(1)
SymbolParameterConditionsBackup Pins in Backup Mode(4)Backup and Normal Pins(4)High Sink Pins(3)Backup and Normal Pins(4)High Sink Pins(3)Units
DRVSTR=0DRVSTR=1
tRISEMaximum Rise timeVDD=3.3V, load=20pF200013664.5ns
tFALLMaximum Fall timeVDD=3.3V, load=20pF200012774.5

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 3.4MHz). 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 pins PA12, PA13, PB12, PB13, PB16, PB17, PB30, PB31 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 VOL=0.4V, and 3mA instead of 6mA for VOL=0.6V.
  3. The following pins are High Sink pins and have different properties than normal pins:

    PA08, PA09, PA16, PA17, PA22, PA23, PA27, PA31.

  4. The following pins are Backup pins and have different properties than normal pins:

    PA00, PA01, PB00, PB01, PB02, PB03.