Browse
STMicroelectronics Community
FAQs
Sign In
Product forums
STM32 MCUs
STM32 MCUs Products
STM32 MCUs Boards and hardware tools
STM32 MCUs Software development tools
STM32 MCUs Embedded software
STM32 MCUs TouchGFX and GUI
STM32 MCUs Motor control
STM32 MCUs Security
STM32 MCUs Wireless
STM32 MPUs
STM32 MPUs Products
STM32 MPUs Boards and hardware tools
STM32 MPUs Embedded software and solutions
STM32 MPUs Software development tools
MEMS and sensors
MEMS (sensors)
Imaging (sensors)
Automotive and Transportation
Automotive MCUs
AutoDevKit Ecosystem
GNSS positioning
Edge AI
Analog and audio
Interface and connectivity ICs
Power management
ST25 NFC/RFID tags and readers
STM8 MCUs
Other: hardware
Other: software
Knowledge base
STM32 MCUs
STM32 MPUs
MEMS and sensors
Analog and audio
EMI filtering and signal conditioning
Interface and connectivity ICs
Power management
Quality & reliability
Academy
About
Community guidelines
Feedback forum
Community blog
Developer news
RWhit
Associate
since
2019-08-19
2023-06-14
User statistics
2
Posts
0
Solutions
0
Kudos given
0
Kudos received
STMicroelectronics Community
About RWhit
Options
Report User
User Activity
Posts
Replies
Can anyone document APBPrescTable ?
2019-10-17
In the standard peripheral library, the array APBPrescTable is used to configure the clock prescaler values.Can anyone explain what these 16 values mean? How do they correspond with the prescalers described in the chip manual ("AHB Prescaler" etc.)?
Re: Can anyone document APBPrescTable ?
2019-10-18
It is in stm32f4xx_rcc.c:static __I uint8_t APBAHBPrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9};
