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JPH04101207A - Power controlling system for extension unit - Google Patents

Power controlling system for extension unit

Info

Publication number
JPH04101207A
JPH04101207A JP2218605A JP21860590A JPH04101207A JP H04101207 A JPH04101207 A JP H04101207A JP 2218605 A JP2218605 A JP 2218605A JP 21860590 A JP21860590 A JP 21860590A JP H04101207 A JPH04101207 A JP H04101207A
Authority
JP
JAPAN
Prior art keywords
power
unit
circuit
operating
receives
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2218605A
Other versions
JP3194939B2 (en
Inventor
Nobutaka Nishigaki
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP21860590A priority Critical patent/JP3194939B2/en
Priority claimed from EP19900117214 external-priority patent/EP0429780B1/en
Publication of JPH04101207A publication Critical patent/JPH04101207A/en
Application granted granted Critical
Publication of JP3194939B2 publication Critical patent/JP3194939B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Abstract

PURPOSE: To turn on power supply always in normal power turning on order without imposing an operating burden on a user by constituting an extension unit so as to have a power supply sequence control function to supply operating power to a circuit in its own unit after confirming that a personal computer receives the operating power and is in an operatable state.
CONSTITUTION: The extension unit 2 is connected to a personal computer PC main body 1. Then, when a voltage detection circuit 51 in the unit 2 receives +5V power supply from a PC side power circuit 20 as the operation acknowledge signal SD of the computer main body 1, it supplies a power enable signal P-EN to a unit side power circuit 52. When the unit side power circuit 52 receives the enable signal P-EN, it outputs stabilized internal operating power. Thus, the unit 2 outputs the operating power of its own unit to each circuit in the inside of its own unit for the first time after it receives the operation acknowledge signal SD. The power can be turned on always in the normal power turning-on order without imposing any operating burden on the user through such power turning-on sequence.
COPYRIGHT: (C)1992,JPO&Japio
JP21860590A 1990-08-20 1990-08-20 Extension unit and power supply control method Expired - Fee Related JP3194939B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21860590A JP3194939B2 (en) 1990-08-20 1990-08-20 Extension unit and power supply control method

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP21860590A JP3194939B2 (en) 1990-08-20 1990-08-20 Extension unit and power supply control method
EP19900117214 EP0429780B1 (en) 1989-11-29 1990-09-06 Computer system capable of connecting an expansion unit
DE1990631705 DE69031705T2 (en) 1989-11-29 1990-09-06 For connecting an expansion unit suitable computer system
DE69031705A DE69031705D1 (en) 1989-11-29 1990-09-06 For connecting an expansion unit suitable computer system
US08/086,462 US5440748A (en) 1989-11-29 1993-07-06 Computer system capable of connecting expansion unit
US08/181,447 US5428798A (en) 1989-11-29 1994-01-14 Computer system capable of connecting expansion unit
US08/407,651 US5680625A (en) 1989-11-29 1995-03-21 Computer system for avoiding coincidence of port address on a bus during expansion

Publications (2)

Publication Number Publication Date
JPH04101207A true JPH04101207A (en) 1992-04-02
JP3194939B2 JP3194939B2 (en) 2001-08-06

Family

ID=16722578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21860590A Expired - Fee Related JP3194939B2 (en) 1990-08-20 1990-08-20 Extension unit and power supply control method

Country Status (1)

Country Link
JP (1) JP3194939B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411503B1 (en) 1996-10-11 2002-06-25 Fujitsu Limited Portable type information apparatus
US6560100B1 (en) 1996-10-24 2003-05-06 Fujitsu Limited Portable computer equipped with add-on battery
US7068503B2 (en) 1997-04-23 2006-06-27 Hitachi, Ltd. Information processing unit and information processing related units
JP2009151573A (en) * 2007-12-20 2009-07-09 Fujitsu Microelectronics Ltd Semiconductor integrated circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101675959B1 (en) * 2016-03-25 2016-11-14 꼬마대장 주식회사 Grass cutting blade cover for mowing machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411503B1 (en) 1996-10-11 2002-06-25 Fujitsu Limited Portable type information apparatus
US6724615B2 (en) 1996-10-11 2004-04-20 Fujitsu Limited Portable-type information apparatus
US6560100B1 (en) 1996-10-24 2003-05-06 Fujitsu Limited Portable computer equipped with add-on battery
US6563702B1 (en) 1996-10-24 2003-05-13 Fujitsu Limited Portable computer equipped with add-on battery
US6674637B2 (en) 1996-10-24 2004-01-06 Fujitsu Limited Portable computer equipped with add-on battery
US6956734B2 (en) 1996-10-24 2005-10-18 Fujitsu Limited Portable computer equipped with add-on battery
US7068503B2 (en) 1997-04-23 2006-06-27 Hitachi, Ltd. Information processing unit and information processing related units
US7274565B2 (en) 1997-04-23 2007-09-25 Hitachi, Ltd. Information processing unit and information processing related units
JP2009151573A (en) * 2007-12-20 2009-07-09 Fujitsu Microelectronics Ltd Semiconductor integrated circuit

Also Published As

Publication number Publication date
JP3194939B2 (en) 2001-08-06

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Legal Events

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