ARM is a 32-bit RISC processor architecture, developed by ARM Limited that is the most widely used 16/32-bit embedded RISC solution in the world. The ARM instruction set architecture has evolved significantly since it was first developed, and will continue to be developed in the future!

The most used are:

ARM7 (ARM720T, ARM7EJ-S, ARM7TDMI and ARM7TDMI-S, CORTEX) with large quantity of peripherals and very aggressive prices, this is the direct competitor of all 16/8 bit Microcontrollers (This is the end of 8 and 16 bits Microcontrollers and $1 microcontroller features ARM Cortex core)

ARM9 (ARM920T,ARM922T, ARM9TDMI, SAM9, ARM9E family) the CORE of a Single Board Computer! With the MMU inside, support major operating systems like embedded Linux (Full Linux with full software like Open Office and Asterisk!!) and Windows CE

ARM11 (ARM11 MPCore, ARM1136J(F)-S, ARM1156T2(F)-S and ARM1176JZ(F)-S, i.MX31 ) Highest performance processor!

There are many popular products that are designed upon ARM chips (approximately 75% of all embedded 32-bit RISC CPUs) with rising trend!

A note for important branches in ARM based processor: StrongARM and XScale from Intel and Texas Instruments OMAP series.

This is our Book about ARM dev.emcelettronica/arm