SCAN IN/OUT DATA TRANSFER SYSTEM

PURPOSE:To inspect the validity of a data transfer by a scan controller side without increasing remarkably the hardware by generating and sending out an inversion signal by a data receiving and transmitting part of a scan object device. CONSTITUTION:In order to inspect the validity of a transfer of...

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1. Verfasser: FUTAKI HIROYUKI
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE:To inspect the validity of a data transfer by a scan controller side without increasing remarkably the hardware by generating and sending out an inversion signal by a data receiving and transmitting part of a scan object device. CONSTITUTION:In order to inspect the validity of a transfer of a scan-in data and a scan-out data, a scan-in data reflection line 21 and a scan-out data reflection line 22 are provided between a scan controller 1 and a scan object device 2. That is, the scan controller 1 inspects the validity of the scan-in data, based on a data from the scan-in data reflection line 21, and inspects the validity of the scan-out data from the scan object device 2 based on a data from the scan-out data reflection line 22. In such a way, a data transfer error can be detected by the scan controller side without increasing remarkably the hardware.