Datasheet

Electrical characteristics STM32F405xx, STM32F407xx
84/202 DocID022152 Rev 8
5.3.6 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 22: Current consumption
measurement scheme.
All Run mode current consumption measurements given in this section are performed using
a CoreMark-compliant code.
Typical and maximum current consumption
The MCU is placed under the following conditions:
• At startup, all I/O pins are configured as analog inputs by firmware.
• All peripherals are disabled except if it is explicitly mentioned.
• The Flash memory access time is adjusted to f
HCLK
frequency (0 wait state from 0 to
30 MHz, 1 wait state from 30 to 60 MHz, 2 wait states from 60 to 90 MHz, 3 wait states
from 90 to 120 MHz, 4 wait states from 120 to 150 MHz, and 5 wait states from 150 to
168 MHz).
• When the peripherals are enabled HCLK is the system clock, f
PCLK1
= f
HCLK
/4, and
f
PCLK2
= f
HCLK
/2, except is explicitly mentioned.
• The maximum values are obtained for V
DD
= 3.6 V and maximum ambient temperature
(T
A
), and the typical values for T
A
= 25 °C and V
DD
= 3.3 V unless otherwise specified.
V
BOR2
Brownout level 2
threshold
Falling edge 2.44 2.50 2.56 V
Rising edge 2.53 2.59 2.63 V
V
BOR3
Brownout level 3
threshold
Falling edge 2.75 2.83 2.88 V
Rising edge 2.85 2.92 2.97 V
V
BORhyst
(1)
BOR hysteresis - - 100 - mV
T
RSTTEMPO
(1)(2)
Reset temporization - 0.5 1.5 3.0 ms
I
RUSH
(1)
InRush current on
voltage regulator
power-on (POR or
wakeup from Standby)
- - 160 200 mA
E
RUSH
(1)
InRush energy on
voltage regulator
power-on (POR or
wakeup from Standby)
V
DD
= 1.8 V, T
A
= 105 °C,
I
RUSH
= 171 mA for 31 µs
--5.4µC
1. Guaranteed by design.
2. The reset temporization is measured from the power-on (POR reset or wakeup from V
BAT
) to the instant
when first instruction is read by the user application code.
Table 19. Embedded reset and power control block characteristics (continued)
Symbol Parameter Conditions Min Typ Max Unit
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