ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,134, issued on Aug. 4, was assigned to TEXAS INSTRUMENTS Inc. (Dallas).
"Addressable test access port" was invented by Lee D. Whetsel (Parker, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "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...