2015年11月23日 (一) 14:15的最后版本

[编辑] 1 Overview

• Small, low power 32-bit RISC controller core, Xtensa ISA
• Cache-less processor with memory protection unit
• 5-stage pipeline
• Dhrystone 2.1: 1.22 DMIPS/MHz
• 24/16-bit ISA with modeless switching
• Iterative 32x32 multiplier
• Separate instruction and data memory interfaces
• Integrated interrupt controller with 15 interrupts at 2 priority levels
• 32-bit ALU
• 16 GPRs

[编辑] 2 Xtensa ISA

The Xtensa instruction set is designed to meet the diverse requirements of dataplane processing.

This 32-bit architecture features a compact 16- and 24-bit instruction set with modeless switching for maximum power efficiency and performance.

The base instruction set has 80 RISC instructions and includes a 32-bit ALU, up to 64 general-purpose 32-bit registers, and six special-purpose registers.

Using this instruction set, you can expect significant code size reductions that result in higher code density and better power dissipation.

• Xtensa GPR and ABI
• Xtensa Instruction Set
• Xtensa Exception
• Xtensa Memory

[编辑] 3 See also

• Xtensa Instruction Set Architecture: http://0x04.net/~mwk/doc/xtensa.pdf
• Diamond Standard 106Micro Controller: http://ip.cadence.com/uploads/pdf/106Micro.pdf