The data memory has a plurality of banks, each with a multiplicity of memory cells that form a matrix of rows and columns with respectively assigned matrix row lines and column lines. The banks are arranged spatially one on top of the other as stacks, with the stack edges that are parallel to the matrix...http://www.google.de/patents/US6741513?utm_source=gb-gplus-sharePatent US6741513 - Data memory with a plurality of memory banks