Receiver, system, and memory with memory protection during power supply transitions
First Claim
1. A receiver comprising:
- a memory;
processing circuitry coupled to the memory, the processing circuitry having an input for receiving a radio frequency (RF) signal, and an output for providing an output signal at another frequency, the processing circuitry comprising one or more independently powered components that perform write operations to the memory; and
a memory protection unit having an input terminal coupled to the first independently powered component, and an output terminal coupled to the memory, the memory protection unit to monitor a power supply voltage level corresponding to each of the one or more independently powered components and, if the power supply voltage level changes during a power supply transition of an independently powered component in which the power supply voltage remains sufficiently large to power the independently powered component, to prevent write operations from a corresponding one of the one or more independently powered components to the memory from occurring at least while the power supply voltage level of the corresponding one of the one or more independently powered components is changing.
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Accused Products
Abstract
A receiver includes a memory, processing circuitry, and a memory protection unit. The processing circuitry is coupled to the memory, and has an input for receiving a radio frequency (RF) signal, and an output for providing an output signal at another frequency. The processing circuitry includes one or more independently powered components adapted to write data to the memory. The memory protection unit is coupled to the memory, and monitors a power supply voltage level corresponding to each independently powered component and, if the power supply voltage level changes during a power supply transition of an independently powered component in which the power supply voltage remains sufficiently large to power the independently powered component, to prevent write operations received from a corresponding one of the one or more independently powered components from occurring at least while the power supply voltage level is changing.
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Citations
20 Claims
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1. A receiver comprising:
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a memory; processing circuitry coupled to the memory, the processing circuitry having an input for receiving a radio frequency (RF) signal, and an output for providing an output signal at another frequency, the processing circuitry comprising one or more independently powered components that perform write operations to the memory; and a memory protection unit having an input terminal coupled to the first independently powered component, and an output terminal coupled to the memory, the memory protection unit to monitor a power supply voltage level corresponding to each of the one or more independently powered components and, if the power supply voltage level changes during a power supply transition of an independently powered component in which the power supply voltage remains sufficiently large to power the independently powered component, to prevent write operations from a corresponding one of the one or more independently powered components to the memory from occurring at least while the power supply voltage level of the corresponding one of the one or more independently powered components is changing. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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a memory; a first independently powered component operating in response to a first power supply voltage and capable of writing data to the memory; and a first memory protection unit having an input terminal coupled to the first independently powered component, and an output terminal coupled to the memory, for monitoring the first power supply voltage and for preventing write operations from the first independently powered component to the memory from occurring in response to a power supply transition of the first power supply voltage in which the first power supply voltage remains sufficiently large to power the first independently powered component, at least while the first power supply voltage is changing. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method comprising:
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powering a processing circuit using a first power supply voltage; monitoring the first power supply voltage; allowing write operations from the processing circuit to a first write port of a memory when the first power supply voltage is not making a transition; and preventing write operations from the processing circuit to the first write port of the memory from occurring in response to a power supply transition of the first power supply voltage in which the first power supply voltage remains sufficiently large to power the processing circuit, at least while the first power supply voltage is changing. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification