ARM处理器的选择

ARM offers a broad range of processors to address a wide variety of applications while delivering optimum performance, power consumption and system cost. these processors are designed to meet the needs of three system categories: Embedded real-time systems Embedded real-time systems for storage, automotive body and power-train, industrial and networking applications Application platforms Devices running open operating systems including Linux, Palm OS, Symbian OS and Windows CE in wireless, consumer entertainment and digital imaging applications Secure applications Smart cards, SIM cards and payment terminals ARM CPU processors cover a wide range of performance and features enabling system designers to create solutions that meet their precise requirements. ARM offers both synthesisable and hard macro products, together with a range of coprocessors and debug facilities . The table below provides an at-a-glance guide to ARM processors and their performance characteristics, with links to each.

ARM CPU PROCESSORS
		Cache Size (Inst/Data)	Tightly Coupled Memory	Memory Mgt	Bus Interface	Thumb	DSP	Jazelle
APPLICATION PROCESSORS
	ARM Cortex-A8	Variable	-	MMU+TrustZone	AMBA 3 AXI	Yes	Yes	Yes
	ARM Cortex-A9 MPCore	16k/64k		MMU+TrustZone	AMBA 3 AXI	Yes	Yes	Yes
	ARM Cortex-A9 Single Core Processor	16k/64k		MMU+TrustZone	AMBA 3 AXI	Yes	No	Yes
	ARM1020E	32k/32k	-	MMU	2x AHB	Yes	Yes	No
	ARM1022E	16k/16k	-	MMU	2x AHB	Yes	Yes	No
	ARM1026EJ-S	Variable	Yes	MMU or MPU	2x AHB	Yes	Yes	Yes