Patent ID: 6173382
Filing Date: 2001-01-09
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 said 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 wherein said first logic operates to control PD data transfer to the system controller from said volatile and non-volatile memories based on which memory stores up-to-date PD data.