Communications system to boundary-scan logic interface

Details Communications system to boundary-scan logic interface Communications system to boundary-scan logic interface

G - Physics

06

F

G06F 11/26 (2006.01) G01R 31/26 (2006.01) G01R 31/3185 (2006.01) H04L 12/26 (2006.01)

Patent

CA 2091087

A control node for controlling a predetermined function in response to messages transmitted over a communications bus and for responding to a second class of such messages to exercise boundary-scan logic to test the control node. The boundary-scan logic is implemented in accordance with ANSI/IEEE Standard 1149.1. The second class of messages include Scan Command messages which contain data for controlling the state of the Test Access Port of the boundary-scan logic, Scan Test Data messages which transmit data to be loaded into the instruction registers or the test data registers of the boundary-scan logic, and Scan Results Request messages which control the node to return the test results over the communications bus.

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