Patent ID: 7057866
Filing Date: 2006-06-06
Classification: G11C

Abstract:
1. An integrated circuit system having a plurality of macros, said integrated circuit system comprising: an external voltage supply input configured for supplying an external voltage to the integrated circuit; and a plurality of internal voltage supply generators, each connected to a respective macro of the plurality of macros and configured for receiving the external voltage, generating an internal voltage supply, and using said generated internal voltage supply for operating its respective macro, wherein each of the plurality of internal voltage supply generators includes a reference supply unit for generating at least one of a voltage level and a current level, a voltage limiter coupled to the reference supply unit for controlling a voltage output level outputted from the voltage limiter, an oscillator coupled to the voltage limiter for receiving the voltage output level and generating an oscillating voltage level, a charge pump for receiving the oscillating voltage level for generating the internal voltage supply, a reference voltage generator for generating and providing a reference voltage for driving at least one voltage generator, wherein the reference voltage generator and the at least one voltage generator provide voltage to a substrate bias level voltage generator, a negative word line level voltage generator, and a boosted wordline high level voltage generator, and an enable register coupled to the voltage limiter, the oscillator and the charge pump, wherein the enable register is configured for storing one of an enable and disable signal, for isolating each of the plurality of macros from the external voltage supply, and for enabling or disabling at least the voltage limiter, the oscillator and the charge pump according to the stored signal.