ScanWorks® JTAG Interface Pods
An interface pod is sometimes installed between the ScanWorks JTAG controller and the UUT to extend the range of voltages supported by the controller to 1.8V-5.0V and to lengthen the distance between the boundary scan controller card and the UUT.
Single Port Boundary Scan/JTAG Pod
The Single Port Boundary Scan Interface Pod can be used with the PCI-100 or PXI-100 controller cards. The Single Port Boundary Scan Interface Pod extend the range of voltages supported by the controllers to 1.8V-5.0V and lengthen the allowable distance between the PC and the UUT.
The Single Port Boundary-Scan Interface Pod provides an interface for a configuration where the ScanWorks JTAG tester is not in close proximity to the board being tested. With the Single Port Interface Pod, the board under test can be up to 20 feet away from the host PC and the maximum test clock frequency still can be maintained. If a reference voltage is provided by the board being tested, the Single Port Boundary Scan Interface Pod supports automatic voltage selection. The Single Port Boundary Scan Interface Pod comes in a sturdy enclosure for ruggedness.
Four Port Boundary Scan/JTAG Interface Pod
The Four Port Boundary Scan Interface Pod can be up to 50 feet from the controller card and still support the maximum TCK frequency of 50 MHz. The Four Port Boundary Scan Pod has four JTAG test ports, each of which supports the IEEE 1149.1 (JTAG) TAP signals and four discrete IO signals for special applications. This pod supports a JTAG TCK frequency up to 50 MHz. The interface to a board being tested can be easily optimized with software-configurable impedance matching circuits. ScanWorks software remembers the settings for each board type and automatically configures the Four-Port Boundary-Scan Interface Pod when the ScanWorks project for that board is loaded.
Four TAP/Buffer Pod
The Four TAP/Buffer Pod combines the features of the Single Port Boundary Scan Interface Pod and the Multitap Buffer Board. It must be used with either a PCI-100 or the PXI-100 JTAG controller card. The differential signals from the controller card to the pod extend the distance to the UUT up to 20 feet. It supports the same scan path control features as the MultiTAP Buffer Board. The four JTAG TAPs are enabled by switches on the Four TAP/Buffer Pod for static applications, or by discrete IO signals from the PCI-100 or PXI-100 Boundary Scan Controllers for dynamic scan path control. If more than one secondary JTAG TAP is active simultaneously, the active TAPs are connected serially to form one scan chain. The Four TAP/Buffer Pod supports a range of voltages from 1.5 to 5.3V, in 16 steps. The voltage is selected by on-board switches or by discrete IO signals from the PCI-100 or PXI-100 JTAG controllers. TAP signal termination is configured by on-board jumpers. The Four TAP/Buffer Pod is powered by the controller card and, therefore, does not require an external power supply. It comes in a sturdy enclosure for ruggedness.