> 5.7 | Characteristics of the GPIOs

> Table 33: | Characteristics of the GPIOs

> Function | Signal name | IO | Signal form and level | Comment
> General Purpose Input/Output | GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 | I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O | R O ≈ 100Ω VOLmax = 0.4V at I = 2mA VOHmin = 2.50V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.0V VIHmax = 3.05V | If unused keep pins with a pull up or pull down resistor while the GPIO is set to input. Alternatively GPIO10 can be used as pulse counter.