Video controller IC with built-in test circuit and method of testing
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Jun 17, 1993
filing date -
Jun 17, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A video controller integrated circuit is provided with an on-chip test data generator within the integrated circuit for emulating an external memory for testing purposes. When activated, the test data generator generates a pseudo-random data stream which is fed to the data input of a video memory controller within the integrated circuit. A signature generator, also within the integrated circuit generates a characteristic signature from the data stream which is compared to a characteristic signature from a known good integrated circuit.
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