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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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