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ARM 公司的 Cortex-M、R、A系之间的联系与区别是什么?
5 ?9 X( j8 [( I6 \简单来说:
6 d' \) Z% Z% Y6 x- L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)。
& `: }7 O+ p. r1 k; R1 g& HCortex-M系列的是mcu的意思7 ]5 m" L, P# k* @, }1 t
Cortex-R系列的是RunTime的意思7 V& n4 j5 V S
Cortex-A系列的是Application的意思
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: Q4 f, `- f* G+ P' k: N7 [A系列可以说是真正的RISC,带有MMU
S/ G' h. e# `" AR系列不带有MMU4 p9 K7 O, q" j( c- d$ H
M系列完全就是MCU。
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0 U$ Y8 @) }8 B9 q2 ^6 b7 m# j 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。; G$ @7 w6 |! ^' ^( q3 d
' C# u# }' ^+ @6 e; S4 V: vARM核心采用的体系架构列表 / @! j. ]; T) \8 @. p8 Z
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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. - k. J9 K" }' j5 |9 a- B! w: M
Cortex underlines ARM's strategy of aligning techna-ology around specific market applications and performance requirements. + ]3 D+ }5 M7 r' w# U
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,
& a% Y1 v8 o# Y: B0 j0 G# | Applications processors for complex OS and user applications.
/ B, M' G1 V1 o3 t/ ? Supports the ARM, Thumb and Thumb-2 instruction sets.& o) P7 G S. m% K7 p
ARM Cortex-R Series! w* C6 A/ J2 }' m8 B: F
Embedded processors for real-time systems.
+ [% Q' ?, J- @4 S. E/ ] Supports the ARM, Thumb, and Thumb-2 instruction sets$ L5 u0 t/ O" \4 v' m" S/ G1 e( [
ARM Cortex-M Series2 x( }, {. a( n( L- v
Deeply embedded processors 1 d& j. m3 @- i. o. @
optimized for cost sensitive applications.
" U: B) U5 W n4 @( v( F Supports the Thumb-2 instruction set only | 5 V* O9 ^6 ?3 j- H
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