面向STM32F37x和STM32F38x系列微控制器的时钟配置工具

3
Conclusion . . . . . . . . . . . . . . . . . . . . .
.......................... 1
5
.
4
Revision
history . . . . . . . . . . . . . . . . . . . . . . 1
6
.....................
for
STM32F37x
microcontrollers . . . . . . . . . . . . . . . . . . . 6
2.2.3
I2S
clock
generator . . . . . . . . . . . . . . . . . . . . . . . .
. . .. . . . .. . . . .. . . . 8
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Doc
ID
023352
Rev
1
3/1
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Glossary
1
Glossary
. . . . . . . . . . . . . . . . . 11 Figure 7. System clock frequency is
exceeded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 12
0 Setting of the PCLK1, PCLK2, TIMCLK (timer clocks) and I2SCLK frequencies
0 Generation of a ready-to-use system_stm32f37x.c file with all the above settings (STM32F37x CMSIS Cortex-M4 Device Peripheral Access Layer System Source File)
2
...................
6
2.2.1
Introduction . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.2
Clock
scheme
Before using the clock tool, it is essential to read the STM32F37x microcontroller reference manual (RM0313). This application note is not a substitute for the reference manual.
9
Expert
3. mode . . . . . . . . . . . . . . . . . . . . . . . . 1
2
.......................
1
Known
limitations . . . . . . . . . . . . . . . . . . . . 1
4
......................
. . . . . . . . . . . . . . . . . 9 Figure 4. Select the clock
source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . 10 Figure 5. File generation
referred to as “STM32F37x clock configuration tool“ throughout the document.
“STM32F37x“ will refer to STM32F37xx and STM32F38x.
The
configuration
tool
is
implemented
Tutorials . . . . . . . . . . . . . . . . . . . . . . ..........................
3
...
9
Wizard
3. mode . . . . . . . . . . . . . . . . . . . . . . .
1 ........................
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AN4132 Application note
Clock
configuration
tool
for
STM32F37x/STM32F3
8x
microcontrollers
Introduction
consideration product parameters such as power supply and Flash access mode.
Note: The clock configuration tool for STM32F37xx and STM32F38xx microcontrollers will be
This application note presents the clock system configuration tool for the STM32F37x and STM32F38x microcontroller families.
The purpose of this tool is to help the user to configure the microcontroller clocks, taking into
This tool supports the following functions for the STM32F37x:
0 Configuration of the system clock, HCLK source and output frequency
0 Configuration of the Flash latency (number of wait states depending on the HCLK frequency)
clock
generator
architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 8 Figure 3. Wizard mode user
interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
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2/16 Rev 1
Doc ID 023352
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AN4132 figures
The STM32F37x_Clock_Configuration_VX.Y.Z.xls is referred to as “clock tool” throughout this document.
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This tool supports only the STM32F37x devices.
For VX.Y.Z, please refer to the tool version, example V1.0.0.
Table 1 lists the microcontrollers concerned by this application note.
Tabl e 2.
Definition of terms
Term
Description
HCLK
PCLK 1
PCLK 2
TIMC LK
F CPU
Ext.Clock
V DD
HSI
AHB clock
APB1 clock
APB2 clock
Timer clock Cortex-M4 clock External clock Power supply High-speed internal clock
Contents
Contents
AN41 32
Glossary . . . . . . . . . . . . . . . . . . . . . .
...........................
1
..
4
Getting
started . . . . . . . . . . . . . . . . . . . . . . .
“STM32F37x_Clock_Configuration_VX.Y.Z.xls”
file which is supplied with the STM32F37x Standard
Library and can be
downloaded from .
in
the
Peripherals
List of figures
List
of
Figure
1.
Clock