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HPPCI JTAG I/O Voltage Detection
1-10 HPUSB, USB, and HPPCI Emulators User’s Guide
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If you encounter a problem launching Vi+ at a certain
frequency, delete your debug session in Vi+ and create a
new debug session. This will set TCK back to the default value of
10 MHz.
HPPCI JTAG I/O Voltage Detection
The mode of operation supported by the PCI emulator is dependent on
the connection method used for the 14-pin JTAG header on your target.
Figure 1-4 and Figure 1-5 show how the target JTAG header connects for
legacy and auto detection modes.
HPUSB/USB Legacy Mode
Legacy mode is used for older targets that do not provide a target VDDIO
input for automatic voltage detection by the emulator. In this mode, the
voltage at which the JTAG signals run is set manually through Visu-
alDSP++ via the Vi+ Configurator utility. The configurator
utility provides a voltage selection setting when configuring the target.
Table 1-1. JTAG Frequency Selection Dialog Box Fields
Item Description
Select frequency (MHz) Selects the frequency to run TCK.
Status Updates status of the tests indicated within the test group. The test
status indicator can show a “running” icon, “not running” icon, “pass”
icon, or “fail” icon, depending on the test status.
Test Tests the selected frequency by running the tests in the Status group.
NOTE: If tests fail, you may have to shut down Vi+ and
restart your session.
OK Saves the selected frequency. This should only be highlighted if all the
tests have passed.
Cancel Continues using the frequency pointed to by the blue arrow.