Advantest V93000 tester provides the utility lines to allow users to control the external devices on a DUT board, such as relays, EEPROMs, and indicators. Users can change the utility line setting by sending the dedicated firmware commands. However, because the sequencer breaks when the utility lines act, the test execution is interrupted and the test time increases considerately. To solve this issue, V93000 tester provides a new way to control utility lines without breaking the sequencer. Users can use utility lines to operate the external devices, synchronizing with the sequencer, at the cost of four additional digital pins. This paper introduces the concept of test sequencer synchronization. It also describes the process of switching and reading the utility line synchronizing with the sequencer. Finally the result is provided that the proposed procedure works effectively and the cost of test time is reduced greatly.
展开▼
