Method and apparatus for supply voltage glitch detection in a monolithic integrated circuit device
First Claim
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1. A method for detecting a glitch in supply voltage provided to a monolithic integrated circuit device having various modes of operation, comprising:
- operating the device in one of a read, erase or program mode of operation;
monitoring a mode of operation of the integrated circuit, to determine whether the integrated circuit is currently active in the read, erase or program mode of operation;
selecting a configurable glitch detection parameter responsively to the currently active mode of operation;
monitoring a supply voltage of the integrated circuit by a glitch detector of the integrated circuit; and
providing by the glitch detector an alarm signal when the monitored supply voltage violates a glitch detection threshold in accordance with the selected glitch detection parameter.
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Abstract
A monolithic integrated circuit device may include a supply voltage glitch detector for detecting improper supply voltage conditions. Advantageously, the detection threshold of the supply voltage glitch detector is adaptively set based on the mode of operation of the device or a particular part of the device, which is internally known to the device based on certain inputs received by the device, such as commands, interrupts, control signals, and so forth.
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Citations
19 Claims
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1. A method for detecting a glitch in supply voltage provided to a monolithic integrated circuit device having various modes of operation, comprising:
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operating the device in one of a read, erase or program mode of operation; monitoring a mode of operation of the integrated circuit, to determine whether the integrated circuit is currently active in the read, erase or program mode of operation; selecting a configurable glitch detection parameter responsively to the currently active mode of operation; monitoring a supply voltage of the integrated circuit by a glitch detector of the integrated circuit; and providing by the glitch detector an alarm signal when the monitored supply voltage violates a glitch detection threshold in accordance with the selected glitch detection parameter. - View Dependent Claims (2, 3, 4, 17)
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5. A method for detecting a glitch in supply voltage provided to a monolithic integrated circuit device having various modes of operation, comprising:
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operating the device in one of a read, erase or program mode of operation; monitoring a mode of operation of the integrated circuit, to determine whether the integrated circuit is currently active in the read, erase or program mode of operation; selecting a configurable low detection threshold as either a first low detection threshold associated with the read mode of operation, or as a second low detection threshold associated with the erase and program modes of operation, responsively to the currently active mode of operation; selecting a configurable high detection threshold as either a first high detection threshold associated with the read mode of operation, or as a second high detection threshold associated with the erase and program modes of operation, responsively to the currently active mode of operation; and monitoring the supply voltage of the integrated circuit by a glitch detector of the integrated circuit and providing by the glitch detector an alarm signal when the monitored supply voltage violates either the selected configurable low detection threshold, or the selected configurable high detection threshold. - View Dependent Claims (6, 18, 19)
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7. A monolithic integrated circuit device having various modes of operation, comprising:
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a plurality of functional circuits configured to operate respectively at the various modes of operation that include read mode, erase mode, and program mode; control logic configured to provide a control signal indicative of whether the integrated circuit is currently active in anyone of the read, erase or program mode of operation; and a supply voltage threshold detection circuit coupled to the control logic and configurable in response to the control signal to select a configurable glitch detection parameter, to monitor a supply voltage of the integrated circuit and to provide an alarm on an output thereof when the supply voltage violates a glitch detection threshold in accordance with the selected glitch detection parameter. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification