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Arm Architecture: Devices
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ARM Ltd does not manufacture and sell CPU devices based on their own designs, but rather, licenses the processor architecture to interested parties. ARM offers a variety of licensing terms, varying in cost and deliverables. To all licensees, ARM provides an integratable hardware description of the ARM core, as well as complete software development toolset (compiler, debugger, SDK), and the right to sell manufactured silicon containing the ARM CPU. Fabless licensees, who wish to integrate an ARM core into their own chip design, are usually only interested in acquiring a ready-to-manufacture verified IP core. For these customers, ARM delivers a gate netlist description of the chosen ARM core, along with an abstracted simulation model and test programs to aid design integration and verification. More ambitious customers, including integrated device manufacturers (IDM) and foundry operators, choose to acquire the processor IP in synthesizable RTL (Verilog) form.
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These new chips are high-performance standard microcontrollers for a comprehensive range of applications, featuring ARM's industry-leading 32-bit RISC architecture based on the ARM7TDMI® core. Oki positions these series of products as the entry model for those upgrading from 8-bit and 16-bit microcontrollers to 32-bit devices. The company commenced sample shipment in June 2003.
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The ARM architecture has become a dominant force in the microcontroller industry, with devices being sold by many suppliers. Is this trend going the way of the 8051 with devices becoming a commodity, or will vendors distinguish themselves with unique device characteristics? Furthermore, how can this 32-bit architecture compete so effectively in a cost-sensitive marketplace with 8- and 16-bit microcontrollers? This panel discussion will delve into these topics, as well as answering other questions that relate to compiler technology, especially as it relates to programmers upgrading from the 8- and 16-bit world.
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Green Hills Software, Inc. offers the most advanced software products available for the complete range of ARM-architecture microprocessors. This includes the royalty-free INTEGRITY® RTOS, optimizing C/C++ compilers, MULTI® Embedded Development Environment and TimeMachine™. Green Hills ... has a range of hardware debug devices including SuperTrace™ Probe, Green Hills Probe™, and Slingshot™. These integrated solutions enable developers to produce the most reliable products at the lowest cost and fastest time-to-market.
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The ARM architecture is one of the fastest growing microcontroller architectures in embedded devices. It provides two different programmer's models—32- and 16-bit. Because ARM licenses the architecture instead of manufacturing chips, it is used by many different semiconductor companies. This paper provides an overview of the low-level workings of the basic core, focusing on the register set for both 32-bit and 16-bit instruction sets and how these operate in all modes.
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The ARM architecture defines a Harvard-style cache architecture. All of the ARM cache instructions act upon a cache "block" (... referred to as a cache "line"). The internal (also referred to as "L1") caches of ARM processors are represented in the Open Firmware device tree by the following properties contained under "cpu" nodes.
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