TI E2E Community
Stellaris® ARM® Microcontrollers
Stellaris® ARM® LM3S Microcontrollers Forum
how about MMU?
I have a problem in my reserching, it is function of MMU-Memory Management Unit in microcontroller lm3s8962. And without MMU, what capacity will a microcontroller loose?
thanks in advance,
what function is MMU in a microcontroller?
Would you please explain your question further? There is not an MMU (Memory Management Unit) inside the lm3s8962. There is a MPU (Memory Protection Unit), but it is not an MMU and it is not intended to support virtual memory.
If you only need to protect your system resources and tasks from unwanted access, then you can use the MPU, but if you need to support virtual memory, then the MPU cannot support this.
Please refer to section 3.1.4 Memory Protection Unit (MPU) in the lm3s8962 device datasheet.
I know that there is MPU in lm3s8962, but when I surfed web, i saw many definition of MMU, including protection memory, but i have not understood MMU yet, such as the action of MMU, the important of virtual address, if a microcontroller have no MMU or MPU, what will happen?
Hi Robb ,
please you can find more detials on MPU in ARM intro to cortexm3 paper here : http://www.arm.com/pdfs/IntroToCortex-M3.pdf
about mmu , a nice start can be wikipedia : http://en.wikipedia.org/wiki/Memory_management_unit
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.