| 摘要 |
<p>Verification of test information transmitted across an 1149.1 backplane test bus between a circuit board (121) and a test master (14) is accomplished by having both the test master and the circuit board compute a check code for each block of information that is transmitted by, or received at, the board. During intervals other than one of the active Boundary-Scan states, the test master (14) acquires the check codes produced at the circuit board (121) and compares them to the corresponding codes generated by the tests master. Any difference between the corresponding codes generated by the test master and the circuit board signifies a transmission error.</p> |
