Communications system to boundary-scan logic interface
First Claim
1. A control node responsive to signals transmitted on a communications bus, said control node comprising;
- a) boundary-scan test logic for testing the operability of said node;
b) first means responsive to a first class of messages comprising said signals for controlling a predetermined function; and
c) second means responsive to a second class of messages comprising said signals for exercising said boundary-scan logic to test said node.
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Accused Products
Abstract
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.
56 Citations
20 Claims
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1. A control node responsive to signals transmitted on a communications bus, said control node comprising;
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a) boundary-scan test logic for testing the operability of said node; b) first means responsive to a first class of messages comprising said signals for controlling a predetermined function; and c) second means responsive to a second class of messages comprising said signals for exercising said boundary-scan logic to test said node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification