Datasheet

Table Of Contents
DocID022152 Rev 8 93/202
STM32F405xx, STM32F407xx Electrical characteristics
Additional current consumption
The MCU is placed under the following conditions:
All I/O pins are configured in analog mode.
The Flash memory access time is adjusted to f
HCLK
frequency.
The voltage scaling is adjusted to f
HCLK
frequency as follows:
Scale 2 for f
HCLK
144 MHz
Scale 1 for 144 MHz < f
HCLK
168 MHz.
The system clock is HCLK, f
PCLK1
= f
HCLK
/4, and f
PCLK2
= f
HCLK
/2.
The HSE crystal clock frequency is 25 MHz.
T
A
= 25 °C.
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 48: 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
trigger circuits used to discriminate the input value. Unless this specific configuration is
required by the application, this supply current consumption can be avoided by configuring
these I/Os in analog mode. This is notably the case of ADC input pins which should be
configured as analog inputs.
Caution: Any floating input pin can also settle to an intermediate voltage level or switch inadvertently,
as a result of external electromagnetic noise. To avoid current consumption related to
Table 26. Typical current consumption in Run mode, code with data processing
running from Flash memory, regulator ON (ART accelerator enabled
except prefetch), V
DD
= 1.8 V
(1)
1. When peripherals are enabled, the power consumption corresponding to the analog part of the peripherals
(such as ADC or DAC) is not included.
Symbol Parameter Conditions f
HCLK
(MHz)
Typ. at T
A
=
25 °C
Unit
IDD
Supply current in
Run mode
All peripheral
disabled
160 36.2
mA
144 29.3
120 24.7
90 19.3
60 13.4
30 7.7
25 6.0