ARM DS-5 Using the Debug Hardware Configuration Utilities

Creating debug hardware target configurationsFigure 5-7 Scan chain devices with tooltip feature displayed5.7.1 Considerations when adding devices to a scan chainBe aware of the following:• In a traditional JTAG configuration you must add devices in the correct order. The devicenearest to TDO is last on the chain.NoteIf you add the devices in the wrong order, you can later change the order.• In a CoreSight configuration, you must first add the ARMCS-DP device. You can thenadd the remaining CoreSight devices in any order.• Hierarchies are created automatically when a device is added as a CoreSight component,and enables you to manage component interactions easily.• The scan chain shows a unique association name for the device, if one exists, to help youto identify the correct device when you are creating associations.• When the cursor is placed over a device, a tooltip displays details relating to that device.NoteThe Associations item in the tooltip only appears if an association has been set up for thatdevice.5.7.2 See alsoTasks• Removing devices from the scan chain on page 5-16• Changing the order of devices on the scan chain on page 5-17• Setting the clock speed on page 5-24• Setting up a CoreSight trace association file on page 6-11.• Troubleshooting autoconfigation of a scan chain on page 10-11.ARM DUI 0498F Copyright © 2010-2012 ARM. All rights reserved. 5-14ID021112Non-Confidential