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US 6,661,264 B2Granted
Releasing functional blocks in response to a determination of a supply voltage predetermined level and a logic predetermined initial state
AssigneeIntel Corporation
InventorsNathan Y. Moyal, James R. Feddeler, Michael Kent, Raha K. Prasun
Life of this patent
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Abstract
An integrated circuit may be initialized by determining that the supply voltage is ramping up and resetting logic in the integrated circuit to a predetermined initial state using a reset signal. After the logic is determined to be in its initial state and the supply voltage is established, the reset signal may be latched off.
Claims24
A method comprising:
- determining whether logic in a functional block is in a predetermined, initial state;
- releasing the logic to begin operation after a supply voltage reaches a predetermined level and the logic is in its predetermined, initial state;
- generating a pulse until the supply voltage reaches the predetermined level, wherein the pulse steps from a low level to another level while undergoing a transition to a high level;
- and
- preventing a latch from thereafter changing state until the power supply voltage cycles again.
2 more elements
An integrated circuit comprising:
- a functional block including logic to generate a plurality of signals;
- decision logic coupled to receive said signals to determine whether the functional block is in a predetermined, initial state and to generate an output signal indicative of whether the functional block is in the predetermined, initial state;
- a latch coupled to the output signal to generate a reset signal to reset the functional block to the predetermined, initial state, wherein said latch latches said reset signal in a deactivated state in response to the output signal indicating that the functional block is in the predetermined, initial state, and the reset signal in an activated state does not reset said functional block again until the power supply cycles again;
- and
- a pulse generator coupled to the latch to generate an output pulse until a supply voltage reaches a predetermined level, wherein the output pulse steps from a low level to another level while undergoing a transition to a high level.
2 more elements
An integrated circuit comprising:
- a power on reset pulse generator to generate an output pulse until the supply voltage reaches a predetermined level, wherein the output pulse steps from a low level to another level while undergoing a transition to a high level;
- a latch coupled to said generator to output a signal to reset the functional block to a predetermined, initial state;
- a functional block including the logic to generate a plurality of signals;
- decision logic coupled to receive said signals to determine whether the functional block is in the predetermined, initial state and to generate an output signal indicative of whether the functional block is in the predetermined, initial state;
- and
- wherein said latch responsive to the output signal, latches a reset signal wherein the reset signal does not reset said functional block until the power supply cycles again.
3 more elements
Dependencies are inferred from the claim text.