Patent ID: 8443331

Claim:
A method for synchronizing test access port (TAP) controllers comprising: responsive to powering up a first TAP controller while a second TAP controller is in a powered-up state, the first TAP controller entering a reset state and then the first TAP controller entering a first predetermined state, the first predetermined state being an idle state; holding the first TAP controller in the first predetermined state until, responsive to an indication from the second TAP controller that the second TAP controller is in the second predetermined state, releasing the first TAP controller from being held in the first predetermined state, thereby synchronizing the first TAP controller with the second TAP controller; and providing a module test reset signal to the first TAP controller in response to assertion of a module power-up indication, thereby causing the first TAP controller to enter the reset state, the module power-up indication indicative of the module with which the first TAP controller is associated having entered a powered-up condition.