First, second TAP address control inputs for TAP TMS input
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United States of America Patent
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Sep 13, 2016
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N/A
app pub date -
Apr 28, 2015
filing date -
Mar 14, 2008
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Abstract
The disclosure describes a novel method and apparatus for making device TAPs addressable to allow device TAPs to be accessed in a parallel arrangement without the need for having a unique TMS signal for each device TAP in the arrangement. According to the disclosure, device TAPs are addressed by inputting an address on the TDI input of devices on the falling edge of TCK. An address circuit within the device is associated with the device's TAP and responds to the address input to either enable or disable access of the device's TAP.
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