Datasheet

DS10198 Rev 8 151/270
STM32L476xx Electrical characteristics
238
The consumption for the peripherals when using SMPS can be found using STM32CubeMX
PCC tool.
6.3.6 Wakeup time from low-power modes and voltage scaling
transition times
The wakeup times given in Table 52 are the latency between the event and the execution of
the first user instruction.
The device goes in low-power mode after the WFE (Wait For Event) instruction.
1. The BusMatrix is automatically active when at least one master is ON (CPU, DMA).
2. The GPIOx (x= A…H) dynamic current consumption is approximately divided by a factor two versus this table values when
the GPIO port is locked thanks to LCKK and LCKy bits in the GPIOx_LCKR register. In order to save the full GPIOx current
consumption, the GPIOx clock should be disabled in the RCC when all port I/Os are used in alternate function or analog
mode (clock is only required to read or write into GPIO registers, and is not used in AF or analog modes).
3. The AHB to APB1 Bridge is automatically active when at least one peripheral is ON on the APB1.
4. The AHB to APB2 Bridge is automatically active when at least one peripheral is ON on the APB2.
Table 52. Low-power mode wakeup timings
(1)
Symbol Parameter Conditions Typ Max Unit
t
WUSLEEP
Wakeup time from Sleep
mode to Run mode
-66
Nb of
CPU
cycles
t
WULPSLEEP
Wakeup time from Low-
power sleep mode to Low-
power run mode
Wakeup in Flash with Flash in power-down during
low-power sleep mode (SLEEP_PD=1 in
FLASH_ACR) and with clock MSI = 2 MHz
69.3
t
WUSTOP0
Wake up time from Stop 0
mode to Run mode in Flash
Range 1
Wakeup clock MSI = 48 MHz 5.6 10.9
µs
Wakeup clock HSI16 = 16 MHz 4.7 10.4
Range 2
Wakeup clock MSI = 24 MHz 5.7 11.1
Wakeup clock HSI16 = 16 MHz 4.5 10.5
Wakeup clock MSI = 4 MHz 6.6 14.2
Wake up time from Stop 0
mode to Run mode in
SRAM1
Range 1
Wakeup clock MSI = 48 MHz 0.7 2.05
Wakeup clock HSI16 = 16 MHz 1.7 2.8
Range 2
Wakeup clock MSI = 24 MHz 0.8 2.72
Wakeup clock HSI16 = 16 MHz 1.7 2.8
Wakeup clock MSI = 4 MHz 2.4 11.32
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