Process execution control based on the internal states of flash memories and power supply circuit information

摘要

Disclosed is a nonvolatile storage system including: a memory block having a plurality of flash memories; a flash memory power supply circuit outside of the memory block; and a flash memory controller. The flash memory power supply circuit has a plurality of types of power supply circuits for process execution, the power supply circuits for process execution generating and supplying power at a plurality of voltage levels needed to execute processes in the flash memories. The flash memory controller monitors changes of the internal states of the flash memories by communicating with the flash memories, thereby controlling the power supply circuits for process execution and the flash memories.

主权项

1. A nonvolatile storage system, including:
a memory block having a plurality of flash memories; a flash memory power supply circuit provided outside of the memory block; and a flash memory controller for controlling the flash memory power supply circuit and the flash memories, wherein the flash memory power supply circuit includes a plurality of types of power supply circuits for process execution for generating a plurality of different voltage levels necessary to enable to execute a plurality of different processes in the flash memories to feed the flash memories with power, the flash memories each has an internal state notifying terminal for outputting a signal notifying a change in the internal state of the flash memories and notify the change in the internal state of the flash memories of the flash memory controller through an exclusive bus connected between the internal state notifying terminal and the flash memory controller for an internal state notification, the flash memory controller communicates with each of the flash memories to monitor a variation of an internal state of the flash memory to control the operations of the power supply circuits for process execution of the flash memory power supply circuit and processes of the flash memory based on the internal state of the flash memory notified from the flash memories, the plurality of types of power supply circuits for process execution are configured to change output electric energies thereof, the flash memories each notifies the flash memory controller of a load power information indicating a load power needed in each of the power supply circuits for process execution specific to the flash memories, and the flash memory controller includes a power supply control circuit for controlling based on the received load power information the output electric energy of the power supply circuit for process execution corresponding to the received load power information.