Commandable data register control router connected to TCK and TDI

Patent metadata

Field	Value
Publication number	US-8959396-B2
Application number	US-201314031243-A
Country	US
Kind code	B2
Filing date	Sep 19, 2013
Priority date	Mar 25, 2009
Publication date	Feb 17, 2015
Grant date	Feb 17, 2015

Abstract

The disclosure describes a novel method and apparatus for improving the operation of a TAP architecture in a device through the use of Command signal inputs to the TAP architecture. In response to a Command signal input, the TAP architecture can perform streamlined and uninterrupted Update, Capture and Shift operation cycles to a target circuit in the device or streamlined and uninterrupted capture and shift operation cycles to a target circuit in the device. The Command signals can be input to the TAP architecture via the devices dedicated TMS or TDI inputs or via a separate CMD input to the device.

First claim

What is claimed is:

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 instructi…

Assignees

• Texas Instruments Inc

Inventors

• Whetsel Lee D

Classifications

• G01R31/3177 Primary

  Physics · mapped topic

• G06F9/30098

  Physics · mapped topic

• G01R31/318533 Primary

  Physics · mapped topic

• G06F11/348

  Physics · mapped topic

• G01R31/318552

  Physics · mapped topic