Middleware
Application
HAL drivers
Tamper detection, RTC clock calibration,
synchronization, reference clock detection
RTC
Hardware
STM32L0
Series
STemWin
TIM Other
STM32L1
Series
STM32L4
Series
STM32L4+
Series
STM32U5
Series
STM32F0
Series
STM32F2
Series
STM32F3
Series
STM32F4
Series
STM32F7
Series
STM32G0
Series
STM32G4
Series
STM32H7
Series
STM32WB
Series
STM32WL
Series
Boards for demonstrations
NUCLEO-L053R8 STM32L476G-EVAL
NUCLEO-L476RG NUCLEO-L552ZE-Q
STM32L5
Series
Features
• Calendar that keeps time and date
• Tamper detection by erasing backup registers
• Timestamp for the tampering event
• RTC usage in Stop mode
• Smooth digital calibration
• RTC clock synchronization
• Reference clock detection
• Internal tamper detection
Description
The microcontrollers in the STM32F0 Series, STM32F2 Series, STM32F3 Series,
STM32F4 Series, STM32F7 Series, STM32G0 Series, STM32G4 Series, STM32H7
Series, STM32L0 Series, STM32L1 Series, STM32L4 Series, STM32L4+ Series,
STM32L5 Series, STM32U5 Series, STM32WB Series, and STM32WL Series
feature a real-time clock (RTC) peripheral designed to allow the STM32 MCUs to
operate with minimum power requirements.
The applications in the X-CUBE-RTC Expansion Package aim to demonstrate how to
exploit fully the RTC advantages, thus extending product battery life.
For more details, refer to the Using the hardware real-time clock (RTC) and the
tamper management unit (TAMP) with STM32 microcontrollers application note
(AN4759), available on www.st.com.
Product status link
X-CUBE-RTC
RTC (real-time clock) software expansion for STM32Cube
X-CUBE-RTC
Data brief
DB2938 - Rev 4 - June 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
1General information
The X-CUBE-RTC Expansion Package runs on STM32 microcontrollers based on Arm® cores.
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
1.1 Ordering information
X-CUBE-RTC is available for free download from the www.st.com website.
1.2 What is STM32Cube?
STM32Cube is an STMicroelectronics original initiative to significantly improve designer's productivity by reducing
development effort, time, and cost. STM32Cube covers the whole STM32 portfolio.
STM32Cube includes:
• A set of user-friendly software development tools to cover project development from conception to
realization, among which are:
–STM32CubeMX, a graphical software configuration tool that allows the automatic generation of C
initialization code using graphical wizards
–STM32CubeIDE, an all-in-one development tool with peripheral configuration, code generation, code
compilation, and debug features
– STM32CubeProgrammer (STM32CubeProg), a programming tool available in graphical and command-
line versions
– STM32CubeMonitor (STM32CubeMonitor, STM32CubeMonPwr, STM32CubeMonRF,
STM32CubeMonUCPD) powerful monitoring tools to fine-tune the behavior and performance of STM32
applications in real-time
•STM32Cube MCU and MPU Packages, comprehensive embedded-software platforms specific to each
microcontroller and microprocessor series (such as STM32CubeG4 for the STM32G4 Series), which
include:
– STM32Cube hardware abstraction layer (HAL), ensuring maximized portability across the STM32
portfolio
– STM32Cube low-layer APIs, ensuring the best performance and footprints with a high degree of user
control over hardware
– A consistent set of middleware components such as FAT file system, RTOS, USB Device, and USB
Power Delivery
– All embedded software utilities with full sets of peripheral and applicative examples
•STM32Cube Expansion Packages, which contain embedded software components that complement the
functionalities of the STM32Cube MCU and MPU Packages with:
– Middleware extensions and applicative layers
– Examples running on some specific STMicroelectronics development boards
X-CUBE-RTC
General information
DB2938 - Rev 4 page 2/5
