IEEE 1149. 1 JTAG EXTENDING DEVICE AND IEEE 1149. 1 JTAG STANDARD INTERFACE USING METHOD CAPABLE OF FACILITATING COMMUNICATION BETWEEN CIRCUIT ELEMENTS USING JTAG(JOINT TEST ACTION GROUP) STANDARD

摘要

PURPOSE: An IEEE 1149. 1 JTAG extending device and an IEEE 1149. 1 JTAG standard interface using method are provided to offer an asynchronous protocol for function circuit and interactive communication, and to detour a test circuit.;CONSTITUTION: An IEEE 1149. 1 JTAG extending device comprises an integrated circuit(12) and a digital logic(18). The integrated circuit includes a function register and a JTAG standard test data register. The digital logic controls data direct transfer between the JTAG standard test data register and the function register.;COPYRIGHT KIPO 2010