Patent ID: 6381685
Filing Date: 2002-04-30
Classification: G06F,G11C

Abstract:
A memory module comprising: a plurality of memory chips on the module; first logic for configuring the memory module to operate in a selectable mode; second logic for storing initial presence detect (PD) data; and third logic for storing modified PD data that corresponds to a requested mode of operation of the memory module received from a system controller and wherein said second logic comprises a non-volatile memory and said third logic comprises a volatile memory; and further wherein a system controller operates to read the initial PD data and to write modified PD data to said volatile memory; said modified PD data corresponding to a requested operating mode of the memory module by the system controller; said first logic operating to accept said modified PD data when the requested operating mode is available in the memory module and write other modified PD data to said volatile memory when said request mode is not available.