STM32F318C8 datasheet(14/125 Pages) STMICROELECTRONICS

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Functional overview

STM32F318C8 STM32F318K8

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DocID026294 Rev 5

3.5.3

Low-power modes

The STM32F318x8 supports three low-power modes to achieve the best compromise

between low power consumption, short startup time and available wakeup sources:



Sleep mode

In Sleep mode, only the CPU is stopped. All peripherals continue to operate and can

wake up the CPU when an interrupt/event occurs.



Stop mode

Stop mode achieves the lowest power consumption while retaining the content of

SRAM and registers. All clocks in the 1.8 V domain are stopped, the PLL, the HSI RC

and the HSE crystal oscillators are disabled.

The device can be woken up from Stop mode by any of the EXTI line. The EXTI line

source can be one of the 16 external lines, the PVD output, the RTC alarm, COMPx,

I2C or USARTx.

Note:

The RTC, the IWDG, and the corresponding clock sources are not stopped by entering Stop.

3.6

Interconnect matrix

Several peripherals have direct connections between them. This allows autonomous

communication between peripherals, saving CPU resources thus power supply

consumption. In addition, these hardware connections allow fast and predictable latency.

Table 3. STM32F318x8 peripheral interconnect matrix

Interconnect source

Interconnect

destination

Interconnect action

TIMx

Timers synchronization or chaining

ADC1

DAC1

Conversion triggers

DMA

Memory to memory transfer trigger

Compx

Comparator output blanking

COMPx

TIMx

Timer input: OCREF_CLR input, input capture

ADC1

TIM1

Timer triggered by analog watchdog

GPIO

RTCCLK

HSE/32

MC0

TIM16

Clock source used as input channel for HSI and

LSI calibration

CSS

CPU (hard fault)

COMPx

PVD

GPIO

TIM1

TIM15, 16, 17

Timer break

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