Titanium Interfaces User Guide
Signal Direction Description
<instance>_CAPTURE Input Capture pin.
<instance>_SHIFT Input Shift pin.
<instance>_UPDATE Input Update pin.
<instance>_TDO Output JTAG test data out pin.
Design Check: JTAG User Tap Errors and
Warnings
When you check your design, the Interface Designer applies design rules to your JTAG User
Tap settings. The following tables show some of the error and warnng messages you may
encounter and explains how to fix them.
jtag_rule_clock (warning)
Message Clock pin name is empty
To fix Enter a valid clock pin name.
jtag_rule_resource (error)
Message Resource name is empty
Resource is not a valid JTAG device instance
To fix Specify a valid JTAG resource.
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