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ARM 公司的 Cortex-M、R、A系之间的联系与区别是什么?
9 o7 z/ ?: F ?' O" T简单来说:
, k+ B- \! C% M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)。
) [; t7 V0 x. ^2 y4 fCortex-M系列的是mcu的意思
4 ?5 P& U+ |! U; M& f% aCortex-R系列的是RunTime的意思
! z* _" z" K1 Z: E- [Cortex-A系列的是Application的意思4 \$ U0 v% z/ v4 d; W2 r$ v# k2 o
0 R* W3 h) K! y' D' ?A系列可以说是真正的RISC,带有MMU! K6 L2 F. c/ d4 c1 |
R系列不带有MMU2 I: L( g5 F# {3 j) P( u
M系列完全就是MCU。0 @+ N* V2 X+ p H
1 z4 ^+ S8 I: M; [ G2 v 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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# t( D: g( e5 R. V. y: D5 gARM核心采用的体系架构列表 % N' H4 g% c- }5 V( J$ o
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9 J0 R2 f9 X5 UThe Cortex family of ARM processors provides a range of solutions optimized around specific market applications across the full peRFormance spectrum. . |8 O4 z+ Z# q
Cortex underlines ARM's strategy of aligning techna-ology around specific market applications and performance requirements.
+ d. \+ R% l xThe 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 markets9 T5 G( J. D. k/ Y) g( b' Z5 R
: w- Q. u" v1 N' K6 cARM Cortex-A Series,
+ h+ y( w+ L3 d: n4 t z Applications processors for complex OS and user applications.
5 r2 u2 R( c, N Supports the ARM, Thumb and Thumb-2 instruction sets.0 ?8 i' @. ]8 m- y3 e. q( W
ARM Cortex-R Series
" k5 p) h' a3 _) b8 j Embedded processors for real-time systems. $ C; M* K& Y) k. _) i& L- g0 o5 h6 C
Supports the ARM, Thumb, and Thumb-2 instruction sets
: J5 A3 p1 |& d5 oARM Cortex-M Series
2 f/ w/ Q- Z4 y9 l4 O# N Deeply embedded processors
8 ^$ n7 V% @7 m( H+ _ C" w& a optimized for cost sensitive applications.
7 t. E0 h6 h/ g' E* O! z, B Supports the Thumb-2 instruction set only |
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