Datasheet

DS6329 Rev 16 107/184
STM32F20xxx Electrical characteristics
183
Figure 38. FT I/O input characteristics
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 V
OL
/V
OH
) except PC13, PC14 and PC15 which can
sink or source up to ±3mA. When using the PC13 to PC15 GPIOs in output mode, the speed
must not exceed 2 MHz with a maximum load of 30 pF.
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 V
DD,
plus the maximum Run
consumption of the MCU sourced on V
DD,
cannot exceed the absolute maximum rating
I
VDD
(see Table 12).
• The sum of the currents sunk by all the I/Os on V
SS
plus the maximum Run
consumption of the MCU sunk on V
SS
cannot exceed the absolute maximum rating
I
VSS
(see Table 12).
Output voltage levels
Unless otherwise specified, the parameters given in Table 47 are derived from tests
performed under ambient temperature and V
DD
supply voltage conditions summarized in
Table 14. All I/Os are CMOS and TTL compliant.
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