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ARM 公司的 Cortex-M、R、A系之间的联系与区别是什么? ) t& o; M: f6 Y Q
简单来说:
3 r1 g1 S" {' p9 [7 E$ k) K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)。
/ R. @& k* [' J4 x1 s$ i$ mCortex-M系列的是mcu的意思! C0 {2 I! a: f1 N) L
Cortex-R系列的是RunTime的意思# {" A; A* g4 D5 h8 d8 E: p
Cortex-A系列的是Application的意思
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A系列可以说是真正的RISC,带有MMU6 \1 M+ t4 ?7 B* w# Z- p! X$ C& X9 y
R系列不带有MMU+ `5 {% f- U! i% G- @5 b
M系列完全就是MCU。, S5 O9 I& p0 O( s
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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。6 q& o, n4 t4 E( s. i6 ]
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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. . Q7 n' p. `# l; m; r
Cortex underlines ARM's strategy of aligning techna-ology around specific market applications and performance requirements. * O( t5 }, j* H, \ V' H7 R
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 markets2 k3 i U% e9 t
3 Q" x4 ^9 ?& z! M* `ARM Cortex-A Series,
) Z( Y0 A `" l8 P! W) C) g Applications processors for complex OS and user applications.
" E4 T8 T# K7 r+ P; x, ` Supports the ARM, Thumb and Thumb-2 instruction sets.7 B# D5 Z3 N2 m- [1 A i1 k
ARM Cortex-R Series, s2 p: H8 J: ~* K5 w3 ~8 C
Embedded processors for real-time systems. ) m9 K$ ]+ `7 s/ a3 E6 @ u6 L7 C9 e
Supports the ARM, Thumb, and Thumb-2 instruction sets" G& g0 m5 G( q
ARM Cortex-M Series+ S7 |6 m9 s+ O: ~9 ?9 V2 t Q
Deeply embedded processors
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\( |# a8 ~4 L0 H2 ]( f1 o& o, L Supports the Thumb-2 instruction set only | & r6 E/ C) ?# ^/ `. v; w
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