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ARM 公司的 Cortex-M、R、A系之间的联系与区别是什么?
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它们都是Cortex的内核,是ARMv7的版本(不同于ARM7,ARM7的内核版本是ARMv4)。% a' v6 F9 \6 p f1 K
Cortex-M系列的是mcu的意思) k7 k1 j, J2 i6 t/ Z
Cortex-R系列的是RunTime的意思
' N1 l2 I4 y7 J gCortex-A系列的是Application的意思+ H* Z2 o8 O- Q: g- q
" D* f7 _0 p0 S. k: X* mA系列可以说是真正的RISC,带有MMU
" R( b0 t# X$ X& e9 zR系列不带有MMU0 T3 N- p0 J" @9 Q, `# t# t
M系列完全就是MCU。
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) g; [- r) W6 N' g ARMv7架构定义了三大分工明确的系列:“A”系列面向尖端的基于虚拟内存的操作系统和用户应用,包括高阶版的ARM Cortex-A9处理器;“R”系列针对实时系统;“M”系列对微控制器和低成本应用提供优化。
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ARM核心采用的体系架构列表
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The Cortex family of ARM processors provides a range of solutions optimized around specific market applications across the full peRFormance spectrum.
5 U0 v5 T5 q! OCortex underlines ARM's strategy of aligning techna-ology around specific market applications and performance requirements. 4 i* J$ K, W" x
The ARM Cortex family is comprised of three series, which all implement the Thumb-2 instruction set to address the increasing performance and cost demands of various markets
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ARM Cortex-A Series, 3 o& h' y. N" \, Y9 A
Applications processors for complex OS and user applications.
+ U( b3 `3 Y! O7 w* p Supports the ARM, Thumb and Thumb-2 instruction sets.* I% Z( M7 X0 k" s8 j+ @2 u
ARM Cortex-R Series
( t$ b" h ^7 g, q/ f/ m3 w- g) b; ~ Embedded processors for real-time systems. % u- l' [9 w6 c
Supports the ARM, Thumb, and Thumb-2 instruction sets
$ _3 x* z( j# x3 c3 G) ^9 uARM Cortex-M Series
/ p9 ]2 O- ^ g, H; m) _ Deeply embedded processors
. `& Q7 o& H0 }$ X optimized for cost sensitive applications.
0 I3 q/ J# R( e2 ^( T8 ] Supports the Thumb-2 instruction set only |
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