System and method for using TAP controllers
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United States of America Patent
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Apr 28, 2009
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N/A
app pub date -
Oct 15, 2003
filing date -
Oct 15, 2003
priority date (Note) -
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Abstract
A system and method for dynamically writing to and reading from an internal register space of a chip using a TAP controller without interfering with the normal operation of the chip is provided. Data that is to be written is loaded into a data register in the TAP controller before being written in the internal register space and the write instructions are loaded into an instruction register of the TAP controller. The address of the internal register space from where data is to be read is also loaded to the data register. Data is read and/or written from the internal register space after the TAP controller gets access to the internal register space via arbitration.
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