Memory controller and a method for controlling access to a memory module

Abstract

The application discloses a memory controller coupled between a memory module and a host controller to control access of the host controller to the memory module, comprising a central buffer coupled between the host controller and the memory module. The central buffer is configured to receive a command/address signal from the host controller via a command/address channel and selectively provide the command/address signal to the memory module. The command/address signal has an identity authentication message for identifying a source. The central buffer comprises: a verification module coupled to the command/address channel to receive the command/address signal and the identity authentication message, and configured to determine whether the command/address signal conforms to an authority management rule based on the identity authentication message; and an access control module coupled to the command/address channel to receive the command/address signal and coupled to the verification module to receive the determination result, and configured to process the command/address signal based on the determination result to selectively provide the command/address signal to the memory module.