Semiconductor memory system with a data copying function and a data copy method for the same

Abstract

A semiconductor memory system comprises a nonvolatile memory and a controller configured to control the nonvolatile memory. The controller causes management data for page data to be inputted to a redundant area of the nonvolatile memory before the execution of a program and, when moving the page data in the nonvolatile memory to one other page, controls the reading of the page data to check the page data for errors during a program period for the one other page.

1 - 20 . (canceled)  
   
   
       21 . A semiconductor memory system comprising: 
 a nonvolatile memory; and    a first controller which is configured to control the nonvolatile memory and controls the reading of the page data to check the page data for errors when page data in the nonvolatile memory is moved to another page.    
   
   
       22 . The semiconductor memory system according to  claim 21 , wherein corrected data is written into the page data to correct an erroneous part of the data when errors are found.  
   
   
       23 . The semiconductor memory system according to  claim 21 , further comprising a buffer memory configured to hold the page data and to input corrected data when errors are found.  
   
   
       24 . The semiconductor memory system according to  claim 23 , further comprising a second controller configured to write the page data in the buffer memory into another page after an erroneous part of the data is corrected.  
   
   
       25 . The semiconductor memory system according to  claim 21 , wherein the nonvolatile memory is a NAND flash memory.  
   
   
       26 . A semiconductor memory system comprising: 
 a nonvolatile memory; and    a first controller which is configured to control the nonvolatile memory and controls the reading of the page data to check the page data for errors during a program operation period of the nonvolatile memory when page data in the nonvolatile memory is moved to another page.    
   
   
       27 . The semiconductor memory system according to  claim 26 , wherein corrected data is written into the page data to correct an erroneous part of the data when errors are found.  
   
   
       28 . The semiconductor memory system according to  claim 26 , further comprising a buffer memory configured to hold the page data and to input corrected data when errors are found.  
   
   
       29 . The semiconductor memory system according to  claim 28 , further comprising a second controller configured to write the page data in the buffer memory into another page after the erroneous part of the data is corrected.  
   
   
       30 . The semiconductor memory system according to  claim 26 , wherein the nonvolatile memory is a NAND flash memory.  
   
   
       31 . A semiconductor memory system data copying method comprising: 
 inputting management data for page data to a redundant area of a nonvolatile memory;    executing a program; and    reading the page data during a program operation period of the nonvolatile memory and checking the page data for errors, when the page data in the nonvolatile memory is moved to another page.