发明名称 |
ELECTRONIC DEVICE EQUIPPED WITH DATA BACK UP FUNCTION |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electronic device equipped with a data back up function which can select a battery without the use of an internal logic power source voltage. <P>SOLUTION: The electronic device is equipped with; an internal logic power source 2 used as a circuit operation power source in the electronic device; a super capacitance 5 which is charged when the power source of the electronic device is turned on, and supplies power to an SRAM1 for data back up from immediately after power off; a battery 6 for back up of voltage higher than the voltage of the internal logic power source 2 and plus terminal voltage of the super capacitance 5 so that the electronic device does not consume a current when the power source is turned on and the super capacitance 5 is charged enough; a voltage monitoring IC 8 which detects a brownout of the super capacitance 5; and a battery power source on/off control circuit 14 which supplies power source to the SRAM1 from the battery 6 for back up by a brownout detection signal of the super capacitance 5 outputted from the voltage monitoring IC 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
申请公布号 |
JP2005010972(A) |
申请公布日期 |
2005.01.13 |
申请号 |
JP20030172798 |
申请日期 |
2003.06.18 |
申请人 |
YASKAWA ELECTRIC CORP |
发明人 |
KAKIMOTO HISANORI;TAKAYAMA SHIGENORI |
分类号 |
G06F1/26;G06F1/28;G06F12/16;(IPC1-7):G06F1/26 |
主分类号 |
G06F1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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