Patent ID: 11867759
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A system comprising the device of claim 1, the system further comprising two other test target devices coupled to the test bus in a star configuration, wherein each device of the two other test target devices includes:
a test clock input configurable to receive the test clock signal of the test bus;
a test mode input configurable to receive the test mode signal of the test bus; and
test interface logic coupled to the respective test clock input and the respective test mode input, wherein the test interface logic of the two other test target devices is configured to:
operate in an offline state even while receiving the test clock signal and receiving the test mode signal from the test bus; and
transition to an online state in response to detecting the predetermined packet of the test mode signal in serial during multiple cycles of the test clock signal.