Semiconductor memory device operational processing device and storage system
View Patent ↗A thin film magnetic memory includes a size-variable Read Only Memory (ROM) region and a size-variable Random Access Memory (RAM) coupled to different ports for parallel access to the ports, respectively. A memory system allowing fast and efficient data transfer can be achieved.
1. A semiconductor integrated circuit comprising:
a memory unit including (i) a plurality of memory regions each having a plurality of memory cells each nonvolatilely storing information, each memory region storing different attribute from others, (ii) a plurality of buses arranged corresponding to said plurality of memory regions and separately from each other, and (iii) a plurality of port connection control circuits arranged corresponding to said plurality of memory regions, each for selectively coupling a corresponding memory region to said plurality of buses, each port connection control circuit including a sub-circuit for selectively inhibiting writing of information in a corresponding memory region in accordance with an attribute of the information stored in a corresponding memory region; and
a processor for transferring the information with said plurality of buses.