Memory access device outputting transfer request

A memory access system, comprising:

• a processor;
• a first memory storing a data;
• and
• a memory access device configured to perform data transfer between the processor and the first memory, wherein
• the memory access device comprises:
• a second memory coupled between the processor and the first memory;
• a memory controller configured to transfer the data from the first memory to the second memory based on a transfer request;
• a read controller configured to read the data from the second memory, output the data to the processor, and control a read pointer indicating an address reading the data from the second memory;
• and
• a write controller configured to output the transfer request to the memory controller,
• wherein the write controller computes an available capacity of the second memory based on the read pointer, a size of the second memory and a cumulative addition value obtained by adding cumulatively a data size which is requested from the processor, wherein the cumulative addition value is an address of data to be written into the second memory, and outputs the transfer request based on the available capacity.

A processing method of a memory access device configured to perform data transfer between a processor and a first memory, the processing method comprising:

• reading a data from a second memory which is coupled between the processor and the first memory
• outputting the data to the processor;
• controlling a read pointer indicating an address reading the data from the second memory;
• computing an available capacity of the second memory based on the read pointer, a size of the second memory and a cumulative addition value obtained by adding cumulatively a data size which is requested from the processor, wherein the cumulative addition value is an address of data to be written into the second memory;
• outputting a transfer request based on the available capacity;
• and
• transferring the data from the first memory to the second memory based on the transfer request.