ULINK2 User's GuideIntroduction Hardware Description Setup ULINK2 Using ULINK2 Downloading to Flash Debugging Programs Chaining Multiple Targets Configure Cortex-M Devices for Tracing µVision Windows Troubleshooting Guide Appendix
Chaining Multiple Targets
Chaining multiple targets, or target chaining, refers to the ability to attach multiple target systems to one single JTAG bus. In this configuration, ULINK2 can access one target at a time.
In order to chain targets, the devices must support the following:
Setting Up Multiple Targets
ULINK2 scans for an IDCODE, a device name, and an IR length for each target, and sets up targets automatically. The results of this scan are displayed in the JTAG Device Chain section of the ARM Target Driver Setup dialog (Project — Options for Target — Debug — Settings).
If the automatic setup fails, you may use Manual Configuration to setup the attributes of each device. To use Manual Configuration, the target device must have BYPASS register support. See JTAG Device Chain for more information about Manual Configuration.
To connect multiple targets:
The data output from one target (TDO) should be the input to the next target (TDI) in the chain.
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