STM8L052C6 datasheet(13/103 Pages) STMICROELECTRONICS

13 / 103 page

DocID023331 Rev 2

13/103

STM8L052C6

Functional overview

3.1

Low-power modes

The medium-density value line STM8L052C6 supports five low power modes to achieve the

best compromise between low power consumption, short startup time and available wakeup

sources:



Wait mode: The CPU clock is stopped, but selected peripherals keep running. An

internal or external interrupt, event or a Reset can be used to exit the microcontroller

from Wait mode (WFE or WFI mode).



Low power run mode: The CPU and the selected peripherals are running. Execution

is done from RAM with a low speed oscillator (LSI or LSE). Flash memory and data

EEPROM are stopped and the voltage regulator is configured in ultra-low-power mode.

The microcontroller enters Low power run mode by software and can exit from this

mode by software or by a reset.



All interrupts must be masked. They cannot be used to exit the microcontroller from this

mode.



Low power wait mode: This mode is entered when executing a Wait for event in Low

power run mode. It is similar to Low power run mode except that the CPU clock is

stopped. The wakeup from this mode is triggered by a Reset or by an internal or

external event (peripheral event generated by the timers, serial interfaces, DMA

controller (DMA1) and I/O ports). When the wakeup is triggered by an event, the

system goes back to Low power run mode.



All interrupts must be masked. They cannot be used to exit the microcontroller from this

mode.



Active-halt mode: CPU and peripheral clocks are stopped, except RTC. The wakeup

can be triggered by RTC interrupts, external interrupts or reset.



Halt mode: CPU and peripheral clocks are stopped, the device remains powered on.

The RAM content is preserved. The wakeup is triggered by an external interrupt or

reset. A few peripherals have also a wakeup from Halt capability. Switching off the

internal reference voltage reduces power consumption. Through software configuration

it is also possible to wake up the device without waiting for the internal reference

voltage wakeup time to have a fast wakeup time of 5 µs.

STM8L052C6 bảng dữ liệu(PDF) 13 Page - STMicroelectronics

STM8L052C6 bảng dữ liệu(HTML) 13 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL