Voltage droop dynamic recovery

A system for voltage droop recovery in an integrated circuit (IC), the system comprising:

• a voltage sensing circuit for a resource in the IC;
• a microprocessor coupled to the voltage sensing circuit, wherein the microprocessor includes an instruction sequencing unit and a pipeline including a first series of instructions;
• and
• a central voltage droop detection processor for detecting a voltage droop based on the voltage sensing circuit, and, in the case that the voltage droop is detected:
• interrupting processing in the microprocessor,
• clearing the pipeline in the case that the voltage droop is detected, and
• causing issuing of a second series of instructions by the instruction sequencing unit, wherein the second series of instructions includes the first series of instructions and additional instructions including stall instructions to cause a delay in processing of the first series of instructions at the resource.

A method of voltage droop recovery in an integrated circuit (IC), the method comprising the steps of:

• providing a voltage sensing circuit for at least one resource of the IC;
• providing a microprocessor coupled to each voltage sensing circuit, wherein the microprocessor includes an instruction sequencing unit and a pipeline including a first series of instructions;
• providing a central voltage droop detection processor coupled to each voltage sensing circuit and the microprocessor;
• detecting a voltage droop using the voltage sensing circuit;
• interrupting processing of the microprocessor in the case that the voltage droop is detected, the interrupting step including clearing the pipeline;
• and
• causing issuing a second series of instructions including the first series of instructions and additional instructions, wherein the additional instructions include stall instructions to cause a delay in processing of the first series of instructions by the resource, and wherein the causing step occurs each time the instruction sequencing unit subsequently generates the first series of instructions.