Patent ID: 7788515
Filing Date: 2010-08-31
Classification: G06F

Abstract:
1. An apparatus including an integrated circuit having internal circuitry for providing, via a single output electrode, a status signal having time multiplexed states indicative of a power on reset condition for external circuitry following enablement of operations of portions of said internal circuitry, and further indicative of subsequent operation statuses of said internal circuitry portions, comprising: shorter delay circuitry responsive to a plurality of ready signals having states indicative of stabilized and non-stabilized states of operations of corresponding portions of said internal circuitry by providing, in accordance with a plurality of shorter time delays, a plurality of corresponding delayed ready signals; longer delay circuitry responsive to said plurality of ready signals and a plurality of enable signals having states indicative of enabled and non-enabled states of operations of said corresponding portions of said internal circuitry by providing a plurality of corresponding logic signals indicative of said states of respective pairs of one of said plurality of enable signals and one of said plurality of ready signals, and, in accordance with a plurality of longer time delays, a plurality of corresponding delayed logic signals and a plurality of corresponding inverse delayed logic signals; and encoding circuitry coupled to said shorter delay circuitry and said longer delay circuitry, and responsive to said plurality of enable signals, said plurality of ready signals, said plurality of logic signals, said plurality of delayed logic signals, and said plurality of inverse delayed logic signals by providing a status signal having time multiplexed states which are indicative of a power on reset condition for external circuitry following one or more of said enabled states of operations of said corresponding portions of said internal circuitry, and are further indicative of one or more of said stabilized states of operations of said corresponding portions of said internal circuitry, wherein