From cortex-m.com This presentation is number 1 in a series of 10 presenting on developing embedded applications for the ARM Cortex-M. The Microcontroller board used in this series is Tiva C TM4C123x LaunchPad, however, what is thought here applies to all Cortex-M boards from other vendors such STM32, LPC, etc.

1. Introduction to ARM
Cortex- M

2. ARM Cortex – M :
• A group of 32-bits processor cores
• Licensed by ARM company
• The company does not manufacture
processors.

3. 32-bits ?
• Internal registers in the
register bank are 32-bits
• Data paths are 32-bits
• Bus Interfaces are 32-bits

4. 32-bit can handle
232
= 4294967296 bytes
=4.2GB
Bit size
Bit size allows the CPU to address memory
for an individual process.
X- bit can handle 2
x
bytes of memory
16-bit can handle
216
= 65536 bytes
8-bit can handle
28
= 256 bytesThe higher the bit size
the higher
performance.

5. Cortex – M family
Cortex- M0 Cortex – M0+ Cortex-M1 Cortex – M3 Cortex – M4 Cortex-M7
• Cheapest
• Low area 90µm
• Lowest energy consumption
• 15 years
• Performance
efficiency
• Digital Signal Control
• Floating point
• Max. DSC performance
• Flexible memory system
• High precision FP
• FPGA Application

6. Why Cortex – M ?
• High code density
• Energy efficient
• Interrupts

7. Microprocessor vs Microcontroller
Basically, a microprocessor has only a
CPU i.e. processing power.
Microcontroller has CPU, ROM, RAM
and other peripherals.

8. CPU
INTERRUPTS
INTERFACES / PORTS
MICROPROCESSOR
CPU
INTERRUPTS
INTERFACES / PORTS
MICROPROCESSOR
RAM ROM
INPUT PORTS
OUTPUT PORTS
INTERNAL
PERIPHERALS
MICROCONTROLLER
In simple terms…

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10. The End