Nonvolatile memory with a programmable configuration cell and a configuration logic for temporarily reconfiguring the memory without altering the programmed state of the configuration cell
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United States of America Patent
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Nov 5, 1996
Issued Date -
N/A
app pub date -
Aug 22, 1995
filing date -
May 27, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A nonvolatile memory includes a memory array, control circuitry coupled to the memory array for controlling memory operations with respect to the memory array, and a configuration cell coupled to the control circuitry for generating a configuration signal to configure the nonvolatile memory with respect to the memory operations. The configuration cell can be programmed in a first state and a second state. A configuration logic is coupled to the configuration cell and the control circuitry for altering the configuration signal from the configuration cell to the control circuitry without causing the configuration cell to be reprogrammed. The configuration logic includes an exclusive or gate that temporarily alters the configuration signal without affecting a programmed state of the configuration cell. The configuration logic can also disable the configuration signal to the control circuitry and configure the nonvolatile memory with a temporary configuration information stored in a configuration register of the configuration logic.
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