Non volatile multi-bit memory unit for use in multi-bit flash memory system of e.g. mobile terminal, has cache memory with random access memory and electrically coupled with page buffer that comprises set of buffers

摘要

The memory unit (105) has a memory cell array (110) with a set of memory cells, and a page buffer (120) electrically coupled with the memory cell array. The page buffer comprises a set of buffers (125) for storing a bit from multi-bit data that is written to or read from the set of memory cells. A cache memory with a random access memory is electrically coupled with the page buffer. The cache memory stores another bit of multi-bit data, which is written to and read from the memory cells. Independent claims are also included for the following: (1) a system comprising a non volatile multi-bit memory unit (2) a method for programming a non volatile multi-bit memory unit.