Agilent Technologies 93000 SOC Series, Руководство по обучению

Страница: 299 / 640

10-10 Vector Generation Vector and Pattern Management
Agilent 93000 SOC Series User Training Part 1, October 2004
299
The ASCII period and the delays specified in the state character defini-
tions are converted into the tester cycle length and the delays of a
timing set. In the most simple case, the values of the ASCII device cycle
are copied into the timing set. But more complex conversions are often
required.
The following figure shows the excerpts of the wavetable and timing set
for Q0, Q1 that are generated from the ASCII timing file fragment
displayed in Figure 190 on page 297:
Figure 192 Wavetable and Timing Set Generated from ASCII Timing File
Observe the following points in the figure:
• The action sequences of the 4 state character definitions are trans-
lated into 4 waveforms with the physical waveform indices 0
through 3.
• In this example, the waveforms are coded in the pure physical wave-
form format. The first column contains the physical waveform
index, the second the action sequence, and the third (which is
optional) a physical device cycle name, which can be generated in
different formats.
• The period and the delays are copied into timing set 1.
The timing translator also requires a pin configuration file to verify
that all pins of the DUT are taken into account in the ASCII timing file,
and that the state character definitions for these pins conform to their
configuration. The pin configuration file is identical with the pin setup
file, as created with the pin configuration tool of SmarTest.
Vector Translation
In the second step, the vector translator converts the ASCII vector file
into a binary vector file. This includes converting the state characters
of the ASCII vector file into physical waveform indices.