Agilent 5991-2889EN Configuring Boundary Scan Chains on Keysight x1149 Boundary Scan Analyzer - Application free download

File name 5991-2889EN Configuring Boundary Scan Chains on Keysight x1149 Boundary Scan Analyzer - Application

Keysight Technologies Configuring Boundary Scan Chains on Keysight x1149 Boundary Scan Analyzer Application Note Introduction A boundary scan chain consists of two or more boundary scan integrated circuit (IC) devices where the test data output (TDO) of the first boundary scan device in the chain is connected to the test data input (TDI) of the second boundary scan device to form a chain. The test mode select (TMS) and test clock input (TCK) signals are common for all the boundary scan devices in a chain. See Figure 1. Figure 1. A boundary scan chain The Keysight Technologies, Inc. x1149 boundary scan software analyzes the circuit board netlist and the boundary scan description language (BSDL) of the boundary scan device, to detect the chain connections. The boundary scan chain is the key in maximizing the boundary scan test coverage of the board. Engineers who use typical benchtop boundary scan tools today need knowledge of the board to define the chain. This is a time-consuming process as engineering time is needed to manually define the connection of the printed circuit board boundary scan chain before the software can detect the boundary scan chain. This application note provides the procedure for configuring the boundary scan chain of a board. 1. Input file