A method and apparatus determines and sets operating voltage on a JTAG interface by incrementally increasing a test voltage applied thereto. The contents of a register is monitored to detect when the contents switch (change) from a first value to a second value. The voltage occurring at the switch is...http://www.google.fr/patents/US7712003?utm_source=gb-gplus-shareBrevet US7712003 - Methodology and system to set JTAG interface
