Controller circuit and method used in controller circuit for performing remapping index setting without interrupting cpu

A controller circuit, coupled to a central processing unit, a system memory, and a remapping index configuration register, the remapping index configuration register being used to store a remapping index configuration value which is used for remapping a virtual address into multiple physical addresses, and the controller circuit comprises:

• a register circuit, configured to store a setting signal sent from the central processing unit, the setting signal including multiple setting data, the multiple setting data respectively corresponding to multiple consecutive direct memory access operations;
• and
• a processing circuit, coupled to the register circuit, configured to refer to the multiple setting data to perform the multiple consecutive direct memory access operations to access the system memory;
• wherein the processing circuit is used to refer to at least one specific setting data in the multiple setting data to perform at least one specific direct memory access operation to access the system memory, to update the remapping index configuration value stored in the remapping index configuration register to perform a remapping index setting operation.