Device chain pane

Shows a graphical representation of the JTAG device chain.

You can use the graphical representation to choose and activate one device while bypassing other devices in the JTAG chain. By activating only one device in the chain, you can specify the scan pattern of the active device and not have to specify the padding bits required to bypass the non-active devices in the JTAG chain.

To activate a single device, right-click a device and select Activate selected device.

To activate all devices, right-click the background in the Device chain pane and select Activate all devices.

A blue graphical image of a device indicates an active device, while a white graphical image indicates a bypassed device.

Example of a properly connected JTAG chain.

Example of a failed JTAG chain.