Datasheet

Electrical characteristics STM32F091xB STM32F091xC
62/128 DocID026284 Rev 4
I/O system current consumption
The current consumption of the I/O system has two components: static and dynamic.
I/O static current consumption
All the I/Os used as inputs with pull-up generate current consumption when the pin is
externally held low. The value of this current consumption can be simply computed by using
the pull-up/pull-down resistors values given in
Table 53: I/O static characteristics.
For the output pins, any external pull-down or external load must also be considered to
estimate the current consumption.
Additional I/O current consumption is due to I/Os configured as inputs if an intermediate
voltage level is externally applied. This current consumption is caused by the input Schmitt
Table 33. Typical current consumption, code executing from Flash memory,
running from HSE 8 MHz crystal
Symbol Parameter f
HCLK
Typical consumption in
Run mode
Typical consumption in
Sleep mode
Unit
Peripherals
enabled
Peripherals
disabled
Peripherals
enabled
Peripherals
disabled
I
DD
Current
consumption
from V
DD
supply
48 MHz 26.7 15.1 16.4 3.8
mA
36 MHz 20.4 11.8 12.7 3.3
32 MHz 18.5 11.0 11.4 3.0
24 MHz 14.6 8.7 9.0 2.3
16 MHz 10.2 6.1 6.4 1.8
8 MHz 5.1 3.3 3.2 1.2
4 MHz 3.3 2.2 2.3 1.1
2 MHz 2.2 1.7 1.7 1.1
1 MHz 1.6 1.4 1.4 1.1
500 kHz 1.4 1.2 1.2 1.0
I
DDA
Current
consumption
from V
DDA
supply
48 MHz 172
A
36 MHz 131
32 MHz 119
24 MHz 93
16 MHz 67
8 MHz 2.7
4 MHz 2.7
2 MHz 2.7
1 MHz 2.7
500 kHz 2.7
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