Datasheet

Electrical characteristics STM32F051x4 STM32F051x6 STM32F051x8
54/121 DocID022265 Rev 6
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 gen
erate 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 Ta ble 48: I/O static characteristics.
For the output pins, any external pull-down or ext
ernal load must also be considered to
estimate the current consumption.
Additional I/O current consumption is due to I/Os co
nfigured as inputs if an intermediate
voltage level is externally applied. This current consumption is caused by the input Schmitt
Table 29. 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 23.2 13.3 13.2 3.1
mA
36 MHz 17.6 10.3 10.1 2.6
32 MHz 15.6 9.3 9.0 2.4
24 MHz 12.1 7.4 7.0 2.0
16 MHz 8.4 5.1 5.0 1.6
8 MHz 4.5 3.0 2.8 1.1
4 MHz 2.8 2.0 2.0 1.1
2 MHz 1.9 1.5 1.5 1.0
1 MHz 1.5 1.3 1.3 1.0
500 kHz 1.2 1.2 1.1 1.0
I
DDA
Current
consumption
from V
DDA
supply
48 MHz 151
μA
36 MHz 113
32 MHz 101
24 MHz 79
16 MHz 57
8 MHz 2.2
4 MHz 2.2
2 MHz 2.2
1 MHz 2.2
500 kHz 2.2
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