MEMORY CONTROLLER, SEMICONDUCTOR DEVICE, SYSTEM BOARD, AND INFORMATION PROCESSING DEVICE

摘要

PROBLEM TO BE SOLVED: To shorten the time until a processor can read and write data from and to a memory while reducing power consumption.SOLUTION: When interruption to a processor occurs, a memory controller of an embodiment supplies a signal for causing a state, where at least either reading or writing data by the processor is allowed, to a memory to which a first clock is supplied. When a second clock is being supplied to the memory and after the memory is brought into a state where at least either reading or writing is allowed, the memory controller supplies the memory with at least either a signal for reading data or a signal for writing data by the processor. The second clock is generated by an oscillation circuit, which starts operating when the interruption to the processor occurs, and has a higher frequency than that of the first clock.