ARM9 Overview

atomar — Wed, 27 Jun 2012 00:41:08 GMT

Current Revision posted to Documents by atomar on 6/27/2012 12:41:08 AM

ARM9 Overview

The ARM9™ processor family enables single processor solutions for microcontroller, DSP and Java applications, offering savings in chip area and complexity, power consumption, and time-to-market. The ARM9 DSP-enhanced processors are well suited for applications requiring a mix of DSP and microcontroller performance. The ARM9 processor family includes ARM926EJ-S™, ARM946E-S™ and ARM968E-S™ processors.

Cost Effective

From a single design to perpetual ownership

Processors are available to license in a number of forms
Available as per-use, multi-year term, and perpetual use licenses
Also available as hard-macros to reduce time-to-market and design risks

Ecosystem

Broadest ecosystem of compilers, debuggers and RTOS tools in the industry
Plentiful design services partners to aid in design task
Large variety of third party IP available to integrate with processors.

ARM9 Family Technical Features

Supports both ARM and Thumb® instruction sets
Harvard architecture - Separate Instruction & Data memory interfaces
31 x 32-bit registers
32-bit ALU & barrel shifter
Enhanced 32-bit MAC block
CoreSight™ ETM9 interface for enhanced debugging and trace

Memory Controller

Memory operations are controlled by the MMU or MPU
MMU provides
MPU enables
Write buffers

DSP Enhancements

Single cycle 32x16 multiplier implementation
New 32x16 and 16x16 multiply instructions
Efficient fractional saturating arithmetic
Count leading zeros instruction

Flexible Cache Design

Harvard cache architecture
Sizes can be 4 KB to 128 KB increasing in powers of 2
I & D Caches can have independent sizes
Line length fixed at 8 words
Fixed 4 way set association
Zero wait state accesses
Critical word first cache line fill
Non blocking
Virtually addressed

Flexible TCM design

Harvard organization
Sizes can be 0 KB, or 4 KB to 1 MB increasing in powers of two
Can have independent sizes
Can be RAM or ROM
Wait states permitted
Dual banked TCM on ARM968
Physically addressed

Applications

Consumer: Smartphones, PDA, Set top box, PMP, Electronic toys, Digital still cameras, Digital video cameras etc
Networking: Wireless LAN, 802.11, Bluetooth, Firewire, SCSI, 2.5G/3G Baseband etc
Automotive: Power train, ABS, Body systems, Navigation, Infotainment etc
Embedded: USB controllers,bluetooth controllers, medical scanners etc
Storage: HDD controllers, solid state drives etc

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