Книга: Embedded Linux Primer: A Practical, Real-World Approach

3.2.10. Freescale ARM

3.2.10. Freescale ARM

The success of the ARM architecture is made more evident by the fact that leading manufacturers of competing architectures have licensed ARM technology. As a prime example, Freescale Semiconductor has licensed ARM technology for its line of i.MX application processors. These popular ARM-based integrated processors have achieved widespread industry success in multimedia consumer devices such as portable game platforms, PDAs, and cellular handsets.

The Freescale ARM product portfolio includes the i.MX21 and i.MX31 application processors. The i.MX21 features an ARM9 core, and the i.MX31 has an ARM11 core. Like their TI counterparts, these SOCs contain many integrated peripherals required by portable consumer electronics devices with multimedia requirements. The i.MX21/31 contain some of the following integrated interfaces:

• Graphics accelerator

• MPEG-4 encoder

• Keypad and LCD controllers

• Camera interface

• Audio multiplexer

• IrDA infrared I/O

• SD/MMC interface

• Numerous external I/O, such as PCMCIA, USB, DRAM controllers, and UARTs for serial port connection

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