IEEE P1500’s WPI signal
lWRCK : Wrapper Clock, dedicated clk for registers
lWRSTN : Wrapper Reset, dedicated active-low reset signal
lSelectWIR : Selects the WIR register when high. Otherwise either WBR, WBY or any other core-internal register can be chosen depending on the Instruction.
lShiftWR, UpdateWR, and CaptureWR : Explained on the next slide.