Electrical characteristics
STM32F103xx
44/67
Figure 15.
Unused I/O pin connection
Output driving current
The GPIOs (general purpose input/outputs) can sink or source up to +/-8 mA, and sink
+20 mA (with a relaxed V
OL
).
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
●
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
●
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
).
ai14147b
1 0 k
Ω
1 0 k
Ω
UNU SED I/O PORT
STM32F103xx
VDD
UNU SED I/O PORT
STM32F103xx