Circuit for generating a power-up configuration pulse
AssigneeTexas Instruments India Limited
InventorsR. Madhu, U. Bharath
Life of this patent
Estimating the term…
Abstract
A circuit for ensuring stabilized configuration information upon power-up is disclosed. In one embodiment, a semiconductor device includes a configuration information stored in a number of nonvolatile storage elements (fuse bits (16)). A configuration power-on reset circuit (10) generates a signal for latching the configuration data into volatile configuration registers (18) on power-up. The configuration data signals are generated in response to a power-on reset (POR) pulse, and not latched until a predetermined delay after the POR pulse is terminated. The predetermined delay allows time for the data signals from the fuse bits (16) to “settle.” Subsequent POR pulses will not result in another latching action.
Claims8
In a semiconductor device having a first power supply voltage, a circuit for generating stabilized configuration upon power-up, comprising:
- a first data store for storing configuration information, the first data store receiving a power-on reset signal and providing the configuration information as data;
- a mock fuse bit for receiving for receiving the power-on resist signal, tracking response of the first data store, and generating a fuse configuration reset signal;
- a configuration signal generator for receiving the fuse configuration reset signal and generating a configuration reset signal in response thereto, the configuration reset signal being delayed with respect to the power-on reset signal, the configuration signal generator includes a charge device coupled between a node and a predetermined voltage for maintaining the node at the predetermined voltage as the first power supply voltage increases in magnitude during power-up;
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- a second data store for receiving the configuration reset signal from the configuration signal generator and storing the data from the first data store.
In a semiconductor device having a first power supply voltage, a circuit for generating stabilized configuration upon power-up, comprising:
- a first data store for storing configuration information, the first data store receiving a power-on reset signal and providing the configuration information as data;
- a mock fuse bit for receiving the power-on reset signal, tracking response of the first data store, and generating a fuse configuration reset signal;
- a configuration signal generator for receiving the fuse configuration signal and generating a configuration reset signal in response thereto, the configuration reset signal being delayed with respect to the power-on reset signal, the configuration signal generator includes a clamping device for preventing a node from substantially varying from a predetermined voltage as the first power supply voltage increases in magnitude during power-up;
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- a second data store for receiving the configuration reset signal from the configuration signal generator and storing the data from the first data store.
In a semiconductor device having a first power supply voltage, a circuit for generating stabilized configuration upon power-up, comprising:
- a first data store for storing configuration information, the first data store receiving a power-on reset signal and providing the configuration information as data;
- a mock fuse bit for receiving the power-on reset signal, tracking response of the first data store, and generating a fuse configuration reset signal;
- a configuration signal generator for receiving the fuse configuration reset signal and generating a configuration reset signal in response thereto, the configuration reset signal being delayed with respect to the power-on reset signal, the configuration signal generator includes a power-up device for enabling a node to approach a predetermined potential as the first power supply voltage approaches its maximum value;
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- a second data store for receiving the configuration reset signal from the configuration signal generator and storing the data from the first data store.
Dependencies are inferred from the claim text.