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Unformatted text preview: face of this domain. The next few years will see a flood of embedded applications, many of which will be based around ARM processor cores. Designing a 32-bit computer system is a complex undertaking. Designing one on a single chip where it must be 'right first time' is still very challenging. There is no formula for success, but there are many very powerful design tools available to assist the designer. As in most engineering endeavours, one can only get so far by studying the problem and the experiences of others. Understanding an existing design is far easier than creating a new one. Developing a new system on a chip is one of today's greatest challenges in digital electronics.
347 348 Embedded ARM Applications 13.1 The VLSI Ruby II Advanced Communication Processor
VLSI Technology, Inc., were the first ARM semiconductor partner and were instrumental, along with Acorn Computers Limited and Apple Computer, Inc., in setting up ARM Limited as a separate company. Their relationship with the ARM predates the existence of ARM Limited, since they fabricated the very first ARM processors in 1985 and licensed the technology from Acorn Computers in 1987. VLSI have manufactured many standard ARM-based chips for Acorn Computers and produced ARM610 chips for Apple Newtons. They have also produced several ARM-based designs for customer specific products and a number which they have made available as standard parts. The Ruby II chip is one such standard part which is intended for use in portable communications devices. Ruby II organization The organization of Ruby II is illustrated in Figure 13.1 on page 349. The chip is based around an ARM core and includes 2 Kbytes of fast (zero wait state) on-chip SRAM. Critical routines can be loaded into the RAM under application control to get the best performance and minimum power consumption. There is a set of peripheral modules which share a number of pins, including a PCMCIA interface, four byte-wide parallel interfaces and two UARTs. A mode select block controls which combination of these interfaces...
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This document was uploaded on 10/30/2011 for the course CSE 378 380 at SUNY Buffalo.
- Spring '09