Datasheet

DocID024030 Rev 10 101/239
STM32F427xx STM32F429xx Electrical characteristics
198
6.3.7 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code.
The current consumption is measured as described in Figure 23: Current consumption
measurement scheme.
All the run-mode current consumption measurements given in this section are performed
with a reduced code that gives a consumption equivalent to CoreMark code.
Typical and maximum current consumption
The MCU is placed under the following conditions:
• All I/O pins are in input mode with a static value at V
DD
or V
SS
(no load).
• All peripherals are disabled except if it is explicitly mentioned.
• The Flash memory access time is adjusted both to f
HCLK
frequency and V
DD
range
(see Table 18: Limitations depending on the operating power supply range).
• Regulator ON
• The voltage scaling and over-drive mode are adjusted to f
HCLK
frequency as follows:
– Scale 3 for f
HCLK
≤ 120 MHz
– Scale 2 for 120 MHz < f
HCLK
≤ 144 MHz
– Scale 1 for 144 MHz < f
HCLK
≤ 180 MHz. The over-drive is only ON at 180 MHz.
• The system clock is HCLK, f
PCLK1
= f
HCLK
/4, and f
PCLK2
= f
HCLK
/2.
• External clock frequency is 4 MHz and PLL is ON when f
HCLK
is higher than 25 MHz.
• The maximum values are obtained for V
DD
= 3.6 V and a maximum ambient
temperature (T
A
), and the typical values for T
A
= 25 °C and V
DD
= 3.3 V unless
otherwise specified.
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