Patent US5519643A successfully refreshed from Google Patents.
US5519643A
Expired / Lapsed
US
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Method of operating a microprocessor
Assignee: Robert Bosch GmbH
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Filing: 1992-06-17
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Granted: 1996-05-21
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Expires: 2012-06-17
Abstract
Abstract A method for operating a microprocessor (10) which can be switched by an activation signal (23) at an interrupt input (15) from an inactive operating state to an active operating state, with the activation signal (23) being supplied to the interrupt input (15) after a predeterminable time after each entrance into the inactive state.
Inventors
- 👤 Thomas Kentrat
- 👤 Helmut Walter
- 👤 Klaus Voehringer
- 👤 Holger Pruessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:05
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315; G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A method of operating a microprocessor comprising an interrupt terminal, and an input/output unit having an input terminal and a separate output terminal, the microprocessor being programmable to switch from an active operating state to an inactive operating state, said method comprising the steps of: (A) providing a timer having a charging resistor connected to the output terminal, a discharging resistor connected to the input terminal, and a capacitor connected to the charging resistor and the discharging resistor; (B) emitting a charging current through the output terminal and through the charging resistor for charging the capacitor during the active operating state of the microprocessor; (C) discharging a discharge current from the capacitor through the discharging resistor and through the input terminal, beginning immediately upon the microprocessor entering the inactive operating state; (D) generating an activation signal in dependence on a discharged state of the capacitor; and (E) receiving the activation signal at the interrupt terminal for switching the microprocessor from the inactive operating state to the active operating state.
Claim 2
Independent Claim
169 words
A method of operating a microprocessor comprising an interrupt terminal, and an input/output unit having an input terminal and a separate output terminal, the microprocessor being programmable to switch from an active operating state to an inactive operating state, said method comprising the steps of: (A) providing a timer having a charging resistor connected to the output terminal, a discharging resistor connected to the input terminal, and a capacitor connected to the charging resistor and the discharging resistor; (B) emitting a charging current through the output terminal and through the charging resistor for charging the capacitor during the active operating state of the microprocessor; (C) discharging a discharge current from the capacitor through the discharging resistor and through the input terminal, beginning immediately upon the microprocessor entering the inactive operating state; (D) generating an activation signal in dependence on a discharged state of the capacitor; and (E) receiving the activation signal at the interrupt terminal for switching the microprocessor from the inactive operating state to the active operating state.
Claim 3
Dependent Claim
34 words
The method as defined in claim 1, wherein the capacitor is discharged during step (C) in a period of time that is greater than a time required for charging the capacitor during step (B).
Claim 4
Dependent Claim
53 words
The method as defined in claim 1, wherein the charging and discharging resistors are respective ohmic resistors each located between the respective terminals of the microprocessor and the capacitor, with a value of a charging resistance of the charging resistor being less than a value of a discharging resistance of the discharging resistor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-21 | 1999-11-20 | 2000-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-21 | 2003-11-20 | 2004-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-21 | 2007-11-20 | 2008-05-21 | $7700.00 | Window Closed / Lapsed |