DAP local, group, and global control of TAP TCK

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United States of America Patent

PATENT NO 9810740
SERIAL NO

15235912

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
TEXAS INSTRUMENTS INCORPORATEDDALLAS TX

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Whetsel, Lee D Parker, US 868 5694

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