What is memory mapping in Cortex-M3?
The memory map is: The regions for SRAM and peripherals include optional bit-band regions. Bit-banding provides atomic operations to bit data, see Optional bit-banding. The processor reserves regions of the PPB address range for core peripheral registers, see About the Cortex-M3 peripherals. Related content.
What is the peripheral memory region in Cortex-M3 processor?
Common Cortex-M3 microcontroller designs use system bus for SRAM connection. The main SRAM block should be connected through the system bus interface, using the SRAM memory address region. This allows data access to be carried out at the same time as instruction access.
Does Cortex-M3 have FPU?
One of the most important differences between the Cortex ® -M4 MCU and Cortex ® -M3 MCU is that an optional Floating Point Unit (FPU) is added into the Cortex ® -M4 Core to enhance the floating-point data operations.
What is memory mapping in microcontroller?
The memory map shows what is included in each memory region. Aside from decoding which memory block or device is accessed, the memory map also defines the memory attributes of the access.
What are the functions of a memory protection unit in Cortex M3 processor?
The MPU divides the memory map into a number of regions, and defines the location, size, access permissions, and memory attributes of each region. It supports: independent attribute settings for each region. overlapping regions.
How is ARM memory divided?
When an ARM-based system uses MEMC, its memory map is divided into three main areas. The bottom half – 32M bytes – is called logical RAM, and is the memory that most programs ‘see’ when they are executing. The next 16M bytes is allocated to physical RAM….
| s1 | s0 | Mode |
|---|---|---|
| 1 | 0 | IRQ or interrupt |
| 1 | 1 | SVC or supervisor |
What features does the ARM Cortex-M3 core possess?
The Cortex-M3 processor is a 32-bit processor, with a 32-bit wide data path, register bank and memory interface. There are 13 general-purpose registers, two stack pointers, a link register, a program counter and a number of special registers including a program status register.