Output driving current

The GPIOs (general purpose input/outputs) can sink or source up to +/-8 mA, and sink or

source up to +/- 20 mA (with a relaxed VOL/VOH).

In the user application, the number of I/O pins which can drive current must be limited to

respect the absolute maximum rating specified in Section 6.2:

•

The sum of the currents sourced by all the I/Os on VDDIOx, plus the maximum

consumption of the MCU sourced on VDD, cannot exceed the absolute maximum rating

ΣIVDD (see Table 21: Voltage characteristics).

•

The sum of the currents sunk by all the I/Os on VSS, plus the maximum consumption of

the MCU sunk on VSS, cannot exceed the absolute maximum rating ΣIVSS (see

Table 21: Voltage characteristics).

Output voltage levels

Unless otherwise specified, the parameters given in the table below are derived from tests

performed under the ambient temperature and supply voltage conditions summarized in

Table 24: General operating conditions. All I/Os are CMOS- and TTL-compliant (FT, TTa or

TC unless otherwise specified).