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AN2629 bảng dữ liệu(PDF) 40 Page - STMicroelectronics

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AN2629 bảng dữ liệu(HTML) 40 Page - STMicroelectronics

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Using the Backup domain in very low-power applications
AN2629
40/43
Doc ID 13922 Rev 2
8
Using the Backup domain in very low-power
applications
8.1
Introduction
This section describes how to use the STM32F10xxx backup registers and keep the benefit
of the low-power consumption of the Backup domain.
8.2
Using the Backup domain in an applicative way
8.2.1
Context
This section describes how to use the STM32F10xxx backup registers, using the same
firmware as the one used in Section 6.2 of this application note. It can be found in the Zip file
delivered with the application note, in the Run_Mode folder.
The Run_Mode folder contains all the subdirectories and files that make up the core of the
application example:
●
inc subfolder contains the example header files
●
src subfolder contains the example source files
●
project subfolder contains two projects that compile the example files:
–
EWARMv5: contains the project for the EWARM toolchain
–
RVMDK: contains the project for the RVMDK toolchain
–
RIDE: contains the project for the RIDE toolchain
8.2.2
Detailed description
The program is a basic application that sends the time from the RTC on a serial line
(USART). Every second, the time is stored into the backup registers. After a power on reset,
the contents of the backup registers are sent through the USART.
The time at which the power-off event occurred is displayed on the HyperTerminal as shown
in Figure 9.
Figure 9.
HyperTerminal display of time



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