What is RCC in embedded system?
Table of Contents
What is RCC in embedded system?
The RCC controller integrated inside STM32 products manages system and peripheral clocks. Many peripherals have their own clock, independent of the system clock. The RCC also manages the various resets present in the device.
What is RCC clock?
A radio clock or radio-controlled clock (RCC), and often (incorrectly) referred to as an atomic clock is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
What is peripheral clock in microcontroller?
Peripheral clocks are derived from the clock that drives the CPU, which is called CCLK (or cclk). From: Fast and Effective Embedded Systems Design (Second Edition), 2017.
What is STM32 PLL?
PLL is a clock generation engine in the MCU which is used to generate the clock speed which is much higher than the internal HSI or external clock . In MCU, most of the peripheral like USB,Ethernet PHY cannot work if you clock the MCU by low speed HSI or HSE.
What is clock configuration?
The configuration of the clocks in Cortex-M microcontrollers happens through the Reset and Clock Control (RCC) registers, located at a specific address within the internal peripheral region.
What is STM32 HSE?
In STM32 wireless MCUs, based on Arm®(a) Cortex® cores, the RF clock is provided by a high frequency VCO, which takes as reference a signal created by an embedded oscillator using an external crystal. This crystal is the HSE (high-speed external) clock source of the RF synthesizer and of the microcontroller.
What is a RCC signal?
The Radio Controlled Clock (RCC) is a shortwave signal originating near Fort Collins, Colorado, and travels thousands of miles by bouncing off the ionosphere. The signal is better at night due to solar interference during the daytime. The farther you are from Colorado, the weaker the signal.
What is MSF radio signal?
The MSF radio signal is a dedicated standard-frequency and time broadcast that provides an accurate and reliable source of UK civil time. The signal operates on a frequency of 60 kHz and carries a time and date code that can be received and decoded by a wide range of readily-available radio-controlled clocks.
What is PLL feed sequence?
Feed sequence acts as a key to unlock the PLL configuration. A special PLL related register called “PLL0FEED” is used to setup the feed sequence. In order to set the feed sequence, the PLL0FEED register must be assigned with two fixed values i.e. 0XAA and 0X55.
What is peripheral clock?
The peripheral clocks play an integral and unique role in each of their respective tissues, driving the circadian expression of specific genes involved in a variety of physiological functions. The peripheral clocks include the cardiovascular, metabolic, endocrine, immune, and reproductive systems.
What is LSE clock?
The 32.768 kHz low-speed external oscillator (LSE) can be used with an external quartz or resonator, or with an external clock source in Bypass mode. The oscillator driving capability is programmable. Four modes are available, from Ultra-low-power mode with a consumption of only 250 nA, to High-driving mode.
How do you set the clock on a STM32?
STM32 Clock Setup using Registers
- open the CubeMX.
- select your controller.
- choose the external crystal (RCC)
- set the maximum value in the HCLK, and hit enter.
- keep it opened, as we will be using it.