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AN3422 데이터시트(PDF) 36 Page - STMicroelectronics

부품명 AN3422
상세설명  Migration of microcontroller applications from STM32F1 to STM32L1 series
PDF  52 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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Peripheral migration
AN3422
36/52
Doc ID 018976 Rev 2
Low-power
modes
Sleep mode
Stop mode
Standby mode (1.8V domain powered-
off)
RUN Low Power
Sleep mode + peripherals automatic clock gating
Sleep Low Power mode + peripherals automatic clock
gating
Stop mode
Standby mode (VCORE domain powered off)
Note: To further reduce power consumption in Sleep
mode the peripheral clocks can be disabled prior to
executing the WFI or WFE instructions.
Wake-up
sources
Sleep mode
– Any peripheral interrupt/wakeup event
Stop mode
– Any EXTI line event/interrupt
Standby mode
– WKUP pin rising edge
–RTC alarm
– External reset in NRST pin
– IWDG reset
Sleep mode
– Any peripheral interrupt/wakeup event
Stop mode
– Any EXTI line event/interrupt
Standby mode
– WKUP pin rising edge
– RTC alarm A, RTC alarm B, RTC Wakeup, Tamper
event, TimeStamp event
– External reset in NRST pin
– IWDG reset
Configuration
NA
In L1 some additional bits were added:
– PWR_CR[ULP] used to switch off the VREFINT in
STOP and STANDBY modes.
– PWR_CR[FWU] used to ignore the VREFINT startup
time when exiting from low power modes.
– PWR_CR[VOS] used to select the product voltage
range.
– PWR_CR[LPRUN] used to select the RUN low power
mode.
– PWR_CSR[VREFINTRDY]: VREFTINT ready status
– PWR_CSR[VOSF]: Internal Regulator change status
– PWR_CSR[REGLP]: MCU is in Low power run mode
– PWR_CSR[EWUP2] and PWR_CSR[EWUP3]:
Wakeup Pin 2 and Wakeup Pin 3 Enable/Disable bits.
Table 14.
PWR differences between STM32F1 series and STM32L1 series (continued)
PWR
STM32F1 series
STM32L1 series
Color key:
= New feature or new architecture
= Same feature, but specification change or enhancement



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