Method and apparatus for dma-generated memory write-back

Abstract

A method for memory write-back provides a memory access controller and then generates a write-back pattern in the memory access controller. The write-back pattern is then written back into a memory starting at a predetermined address location and continuing for a predetermined length of the addressing space of the memory.

1 . A memory access controller comprising:
 circuitry for generating a write-back pattern configured to generate all of the write-back pattern; and   circuitry for writing-back the write-back pattern into a memory starting at a predetermined address location and continuing for a predetermined length of the addressing space of the memory.   
   
   
       2 . The memory access controller of  claim 1 , wherein the write-back pattern is a clearing pattern. 
   
   
       3 . The memory access controller of  claim 1 , wherein the write-back pattern is a repeating write-back data pattern. 
   
   
       4 . The memory access controller of  claim 1 , wherein the write-back pattern is a repeating write-back data pattern that is a standard pattern that is programmed into the memory access controller. 
   
   
       5 . The memory access controller of  claim 1 , wherein the circuitry for writing back coupled to a printer memory. 
   
   
       6 . The memory access controller of  claim 1 , wherein the circuitry for writing-back the write-back pattern is configured to perform the memory write-back in a memory clearing mode or a memory filling mode. 
   
   
       7 . The memory access controller of  claim 1 , wherein the circuitry for writing back coupled to a memory of a portable computing device.