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SEMICONDUCTOR DEVICE

  • US 20140226400A1
  • Filed: 06/25/2013
  • Published: 08/14/2014
  • Est. Priority Date: 02/12/2013
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising:

  • a nonvolatile memory;

    a volatile memory comprising a first area and a second area;

    a first controller configured to control the nonvolatile memory and the volatile memory;

    a power supply unit configured to be supplied with power from a host apparatus and to supply power to the nonvolatile memory, the volatile memory, and the first controller; and

    a second controller configured to be supplied with power from the host apparatus and to control the power supply unit,wherein when a request for transitioning from a first mode to a second mode in which power consumption is smaller than that in the first mode is received, the first controller transitions the first area of the volatile memory to a self-refresh mode and transmits a request to the volatile memory to not perform refreshing of the second area, and after that, transmits a signal to the second controller,the second controller receives the signal from the first controller and transmits a request to the power supply unit to disconnect the power supplied to the nonvolatile memory and the first controller.

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