Boot Sequence of ARM based MCU
A boot sequence is a crucial part of any Microcontroller’s (MCU) operation. It is the process by which an MCU initializes and prepares itself for the main program’s execution. The boot sequence is essential because it sets up the system’s environment, initializes the necessary hardware and software components, and loads the main program into the MCU’s memory. In this article, we will explore the boot sequence of an MCU and understand the steps involved in its operation. Power-On Reset (POR): When an MCU receives power for the first time, a hardware-based reset called a Power-On Reset (POR) occurs. This resets all registers and memory to their default state. Check the Reset Vector: After the POR, the MCU checks the reset vector, which is a location in memory that contains the address of the first instruction to be executed. Initialize the Stack Pointer: The next step is to initialize the stack pointer, which is a register that keeps track of the program’s execution. The stack po...