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Technical Support On-Line Manuals ULINK2 User's Guide |
Chaining Multiple TargetsChaining 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 TargetsULINK2 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. Connecting TargetsTo connect multiple targets:
The data output from one target (TDO) should be the input to the next target (TDI) in the chain.
Note
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