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The XScale, a microprocessor core, is Intel's and Marvell's implementation of the ARMv5 architecture, and consists of several distinct families: IXP, IXC, IOP, PXA and CE (see more below). Intel sold the PXA family to Marvell Technology Group in June 2006.[1]

The XScale architecture is based on the ARMv5TE ISA without the floating point instructions. XScale uses a seven-stage integer and an eight-stage memory superpipelined microarchitecture. It is the successor to the Intel StrongARM line of microprocessors and microcontrollers, which Intel acquired from DEC's Digital Semiconductor division as the side effect of a lawsuit between the two companies. Intel used the StrongARM to replace their ailing line of outdated RISC processors, the i860 and i960.

All the generations of XScale are 32-bit ARMv5TE processors manufactured with a 0.18-µm or 0.13-µm (as in IXP43x parts) process and have a 32-KB data cache and a 32-KB instruction cache. First and second generation XScale cores also have a 2-KB mini-data cache. Products based on the 3rd generation XScale have up to 512-KB unified L2 cache.[2]


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