Minimum memory operating voltage technique
DC CAFCFirst Claim
Patent Images
1. A method, comprising:
- providing an integrated circuit with a memory;
operating the memory with an operating voltage;
determining a value of a minimum operating voltage of the memory;
providing a non-volatile memory (NVM) location;
storing the value of the minimum operating voltage of the memory in the NVM location;
providing a functional circuit on the integrated circuit exclusive of the memory;
providing a first regulated voltage to the functional circuit;
providing a second regulated voltage, the second regulated voltage is greater than the first regulated voltage;
providing the first regulated voltage as the operating voltage of the memory when the first regulated voltage is at least the value of the minimum operating voltage; and
providing the second regulated voltage as the operating voltage of the memory when the first regulated voltage is less than the value of the minimum operating voltage, wherein while the second regulated voltage is provided as the operating voltage of the memory, the first regulated voltage is provided to the functional circuit.
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5 Petitions
Accused Products
Abstract
A method includes an integrated circuit with a memory. The memory operates with an operating voltage. A value of a minimum operating voltage of the memory is determined. The value of the minimum operating voltage is stored in a non-volatile memory location that maybe a non-volatile register. This minimum operating voltage information can then be used in determining when an alternative power supply voltage may be switched to the memory or ensuring that the minimum voltage is otherwise met. The minimum voltage can be used only internal to the integrated circuit or also provided externally to a user.
35 Citations
16 Claims
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1. A method, comprising:
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providing an integrated circuit with a memory; operating the memory with an operating voltage; determining a value of a minimum operating voltage of the memory; providing a non-volatile memory (NVM) location; storing the value of the minimum operating voltage of the memory in the NVM location; providing a functional circuit on the integrated circuit exclusive of the memory; providing a first regulated voltage to the functional circuit; providing a second regulated voltage, the second regulated voltage is greater than the first regulated voltage; providing the first regulated voltage as the operating voltage of the memory when the first regulated voltage is at least the value of the minimum operating voltage; and providing the second regulated voltage as the operating voltage of the memory when the first regulated voltage is less than the value of the minimum operating voltage, wherein while the second regulated voltage is provided as the operating voltage of the memory, the first regulated voltage is provided to the functional circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An integrated circuit, comprising:
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a memory that operates using an operating voltage, wherein the memory is characterized as having a minimum operating voltage; a memory location that stores a value representative of the minimum operating voltage; a first voltage regulator for supplying a first regulated voltage; a circuit that provides a function and uses the first regulated voltage; a second voltage regulator for supplying a second regulated voltage, wherein the second regulated voltage is greater than the first regulated voltage; and a power supply selector that supplies the first regulated voltage as the operating voltage of the memory when the first regulated voltage is at least the minimum operating voltage and supplies the second regulated voltage as the operating voltage when the first regulated voltage is below the minimum operating voltage, wherein while the second regulated voltage is supplied as the operating voltage, the circuit uses the first regulated voltage. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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providing an integrated circuit with a memory that uses an operating voltage; testing the memory to determine the operating voltage of the memory that is a minimum operating voltage; storing, in a non-volatile manner, the value of the minimum operating voltage; providing a functional circuit on the integrated circuit exclusive of the memory; providing a first regulated voltage to the functional circuit; providing a second regulated voltage, wherein the second regulated voltage is greater than the first regulated voltage; providing the first regulated voltage as the operating voltage of the memory when the first regulated voltage is at least the value of the minimum operating voltage; and providing the second regulated voltage as the operating voltage of the memory when the first regulated voltage is less than the value of the minimum operating voltage, wherein while the second regulated voltage is provided as the operating voltage of the memory, the first regulated voltage is provided to the functional circuit.
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Specification