Patent ID: 8959396
Filing Date: 2015-02-17
Classification: G01R,G06F

Abstract:
1. An integrated circuit comprising: A. a TDI signal lead, a TDO signal lead, a TCK signal lead, and a TMS signal lead; B. a TAP state machine having an input coupled to the TCK signal lead, an input coupled to the TMS signal lead, instruction register control outputs, and data register control outputs; C. an instruction register having an input coupled to the TDI signal lead, an output coupled to the TDO signal lead, control inputs coupled to the instruction control outputs of the Tap state machine, and enable outputs; D. a commandable data register control router including: E. a data register having an input coupled to the TDI signal lead, an output coupled to the TDO signal lead, and control inputs coupled to the data register control outputs of the routing circuit.