Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP2017220025
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor device capable of storing save data when power supply is shut down.SOLUTION: A semiconductor device receiving power supply comprises: a memory unit including a plurality of memory cells capable of storing data; a power source detection circuit detecting the shutdown of power supply; and a capacitor capable of temporarily supplying working voltage instead of power supply when the power supply is shut down. The memory unit includes: a voltage generation unit generating a plurality of write voltages on the basis of the working voltage from the capacitor when the power supply is shut down; and a write circuit for performing data write of save data into the plurality of memory cells on the basis the plurality of write voltages generated by the voltage generation unit.SELECTED DRAWING: Figure 1
Inventors:
IWASE TAKASHI
MATSUBARA KEN
MITANI HIDENORI
SATO HIROSHI
MATSUBARA KEN
MITANI HIDENORI
SATO HIROSHI
Application Number:
JP2016113774A
Publication Date:
December 14, 2017
Filing Date:
June 07, 2016
Export Citation:
Assignee:
RENESAS ELECTRONICS CORP
International Classes:
G06F12/16; G06F11/14
Domestic Patent References:
| JP2006163753A | 2006-06-22 | |||
| JP2011158967A | 2011-08-18 | |||
| JPH08249244A | 1996-09-27 | |||
| JP2010003349A | 2010-01-07 | |||
| JPH1151721A | 1999-02-26 |
Attorney, Agent or Firm:
Fukami patent office