Power supply and method for use in a computer system to confirm a save operation of the computer system and to stop a supply of power to the computer system after confirmation
First Claim
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1. A power supply system for use in a computer comprising:
- a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage;
a power output section coupled to said power supply section and includingcoupling means for supplying power from said power supply section to said computer system, andmeans, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and
a power control section havingcoupling means for connecting said power control section to said computer system through a serial transmission path,means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation,means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal,a low batter display section,means for monitoring a voltage and a current of said battery, changing a reference voltage value in accordance with a detected current value, comparing a detected voltage value with said reference voltage value and causing said low battery display section to indicate a low battery when said detected voltage value is below said reference voltage value, andmeans for dividing a level of said low battery into first through third sub-levels in accordance with said detected current value, causing said low battery display section to indicate said low battery upon detection of said first sub-level, sending said power off request signal to said computer system upon detection of said second sub-level, and outputting said power off signal to said power output section.
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Abstract
A power supply for use in a computer system according to this invention has a one-chip microcomputer having a built-in A/D converter. The microcomputer, which has a communication function, performs a power off sequence for a computer system and a power off sequence for a hard disk drive built in the computer system, while communicating with the computer system. Further, the microcomputer detects the voltage and current of a chargeable battery, discriminates a low battery state, monitors a power switch, a hard disk drive switch and a reset switch, and monitors an input/output voltage.
152 Citations
67 Claims
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1. A power supply system for use in a computer comprising:
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a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section having coupling means for connecting said power control section to said computer system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal, a low batter display section, means for monitoring a voltage and a current of said battery, changing a reference voltage value in accordance with a detected current value, comparing a detected voltage value with said reference voltage value and causing said low battery display section to indicate a low battery when said detected voltage value is below said reference voltage value, and means for dividing a level of said low battery into first through third sub-levels in accordance with said detected current value, causing said low battery display section to indicate said low battery upon detection of said first sub-level, sending said power off request signal to said computer system upon detection of said second sub-level, and outputting said power off signal to said power output section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for cutting off a supply of power by a power supply system for use in a computer, the power supply system including a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage, and a power output section coupled to said power supply section, said power output section having a coupling for supplying power from said power supply section to said computer system and being responsive to a power off signal to inhibit the supply of all power to said computer system, the method comprising the steps of:
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monitoring a voltage and a current of said battery; changing a reference voltage value in accordance with a detected current value; comparing a detected voltage value with said reference voltage value and causing a low battery display section to indicate a low battery when said detected voltage value is below said reference voltage value, the comparing step including the steps of dividing a level of said low battery into first through third sub-levels in accordance with said detected current value, causing said low battery display section to indicate said low battery upon detection of said first sub-level, sending a power off request signal to said computer system upon detection of said second sub-level, and outputting said power off signal to said power output section; receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system; receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation; and transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal.
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12. A power supply system for use in a computer having a main memory, registers and a battery backed-up random access memory (RAM), comprising:
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a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section having coupling means for connecting said power control system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, the computer system saving at least contents of the main memory and the registers into the battery backed-up RAM in response to the system power off request signal, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, and means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A power supply system for use in a computer having a disk drive, comprising:
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a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section having coupling means for connecting said power control section to said computer system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal, and means for performing a disk drive power off sequence if said receiving means receives no acknowledgment signal during a predetermined period of time. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A power supply system for use in a computer comprising:
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a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including means including a microcomputer for charging the battery and for detecting completion of a charge operation when any of the following conditions is satisfied; when the battery voltage drops from a peak value by a given value; when a charged capacitance of the battery becomes 150%, provided that a nominal capacitance of the battery is 100%; and when a charging time of the battery exceeds 10 hours. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A power supply system for use in a computer comprising:
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a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including controller means for automatically detecting a presence or absence of the AC adapter and the battery from a first reference voltage representing a driving voltage of the controller means, a second reference voltage representing a maximum voltage of the battery, and an analog input voltage input to the power control section such that the presence of both the AC adapter and the battery are detected when the analog input voltage is less than the second reference voltage, the absence of the AC adapter and the presence of the battery are detected when the analog input voltage is between the first reference voltage and the second reference voltage, and the presence of the AC adapter and the absence of the battery are detected when the analog input voltage is greater than or equal to the second reference voltage. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A portable computer system comprising:
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a data processor assembly including, a central processing unit, program storage means for storing a program for controlling said central processing unit and a data processing result, a backup memory, and a disk drive; a serial transmission path coupled to said data processor assembly; a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section having coupling means for connecting said power control section to said computer system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal, a low batter display section, means for monitoring a voltage and a current of said battery, changing a reference voltage value in accordance with a detected current value, comparing a detected voltage value with said reference voltage value and causing said low battery display section to indicate a low battery when said detected voltage value is below said reference voltage value, and means for dividing a level of said low battery into first through third sub-levels in accordance with said detected current value, causing said low battery display section to indicate said low battery upon detection of said first sub-level, sending said power off request signal to said computer system upon detection of said second sub-level, and outputting said power off signal to said power output section. - View Dependent Claims (54, 55)
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56. A portable computer system comprising:
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a data processor assembly including, a central processing unit, program storage means for storing a program for controlling said central processing unit and a data processing result, a backup memory, and a disk drive; a serial transmission path coupled to said data processor assembly; a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including coupling means for connecting said power control section to said computer system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, the computer system saving at least contents of the program storage means into the backup memory in response to said system power off request signal, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, and means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal, - View Dependent Claims (57, 58)
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59. A portable computer system comprising:
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a data processor assembly including, a central processing unit, program storage means for storing a program for controlling said central processing unit and a data processing result, a backup memory, and a disk drive; a serial transmission path coupled to said data processor assembly; a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including coupling means for connecting said power control section to said computer system through a serial transmission path, means including a microcomputer for detecting a degradation of said power supply section output voltage indicative of impending power failure, for receiving an externally-supplied power off request signal and subsequently transmitting a system power off request signal through said serial transmission path to command a save operation to be performed by said computer system, and for receiving an acknowledgment signal through said serial transmission path to confirm the completion of said save operation, and means for transmitting said power off signal to said power output section to inhibit the supply of power through said power output section after receipt of said acknowledgment signal; and means for performing a disk drive power off sequence if said receiving means receives no acknowledgment signal during a predetermined period of time. - View Dependent Claims (60, 61)
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62. A portable computer system comprising:
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a data processor assembly including, a central processing unit, program storage means for storing a program for controlling said central processing unit and a data processing result, a backup memory, and a disk drive; a serial transmission path coupled to said data processor assembly; a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including means including a microcomputer for charging the battery and for detecting completion of a charge operation when any of the following conditions is satisfied; when the battery voltage drops from a peak value by a given value; when a charged capacitance of the battery becomes 150%, provided that a nominal capacitance of the battery is 100%; and when a charging time of the battery exceeds 10 hours. - View Dependent Claims (63, 64)
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65. A portable computer system comprising:
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a data processor assembly including, a central processing unit, program storage means for storing a program for controlling said central processing unit and a data processing result, a backup memory, and a disk drive; a serial transmission path coupled to said data processor assembly; a power supply section comprising any of a battery and an AC adapter, said power supply section having an output voltage; a power output section coupled to said power supply section and including coupling means for supplying power from said power supply section to said computer system, and means, responsive to a power off signal, for inhibiting the supply of all power to said computer system; and a power control section including controller means for automatically detecting a presence or absence of the AC adapter and the battery from a first reference voltage representing a driving voltage of the controller means, a second reference voltage representing a maximum voltage of the battery, and an analog input voltage input to the power control section such that the presence of both the AC adapter and the battery are detected when the analog input voltage is less than the second reference voltage, the absence of the AC adapter and the presence of the battery are detected when the analog input voltage is between the first reference voltage and the second reference voltage, and the presence of the AC adapter and the absence of the battery are detected when the analog input voltage is greater than or equal to the second reference voltage. - View Dependent Claims (66, 67)
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Specification