Datasheet

Electrical characteristics STM32F101xF, STM32F101xG
82/108 Doc ID 17143 Rev 2
Figure 41. 5 V tolerant I/O input characteristics - CMOS port
Figure 42. 5 V tolerant I/O input characteristics - TTL port
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
).
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 5.2:
● 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 Ta ble 8).
● 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 Ta bl e 8 ).
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