Programmable power supervisor
First Claim
Patent Images
1. A system, comprising:
- at least one power supervisor coupled between two supply voltage terminals and includinga comparator circuit configured to assert at least one output signal in response to a voltage between the terminals varying from at least one trip voltage, anda memory coupled to a programming interface for storing values that establish the at least one trip voltage; and
circuitry coupled between the terminals that receives the at least one output signal, and configured to hold at least a portion of the circuitry in one mode of operation in response to the assertion of at the least one output signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A system can include at least one power supervisor coupled between two supply voltage terminals and including a comparator circuit configured to assert at least one output signal in response to a voltage between the terminals varying from at least one trip voltage, and a memory coupled to a programming interface for storing values that establish the at least one trip voltage; and circuitry coupled between the terminals that receives the at least one output signal, and configured to hold at least a portion of the circuitry in one mode of operation in response to the assertion of at least one output signal.
156 Citations
18 Claims
-
1. A system, comprising:
-
at least one power supervisor coupled between two supply voltage terminals and including a comparator circuit configured to assert at least one output signal in response to a voltage between the terminals varying from at least one trip voltage, and a memory coupled to a programming interface for storing values that establish the at least one trip voltage; and circuitry coupled between the terminals that receives the at least one output signal, and configured to hold at least a portion of the circuitry in one mode of operation in response to the assertion of at the least one output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method, comprising:
-
writing threshold values to a memory; asserting at least one output signal in response to a power supply voltage varying from at least one trip voltage established by the threshold values; and holding at least a portion of circuitry in one mode of operation in response to the at least one output signal being asserted;
whereinthe circuitry is coupled to receive power from power supply terminals. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A method, comprising:
-
storing programmable values in a memory; receiving a power supply voltage; and asserting at least one output signal based on the power supply voltage and at least one condition that varies according to the programmable values;
whereinthe at least one condition includes at least one of a threshold voltage that varies according to the programmable values and asserting the at least one output signal includes asserting one output signal in response to the power supply voltage falling below the threshold voltage, and a delay that varies according to the programmable values and asserting at the least one output signal includes asserting one output signal in response to the power supply voltage falling below a threshold voltage for longer than the delay. - View Dependent Claims (16, 17, 18)
-
Specification