Avago Technologies LSI53C895A - Manual (Page 26)

1-10 General Description
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Power and ground isolation of I/O pads and internal chip logic.
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TolerANT technology, which provides:
– Active negation of SCSI Data, Parity, Request, and Acknowledge
signals for improved fast SCSI transfer rates.
– Input signal filtering on SCSI receivers improves data integrity,
even in noisy cabling environments.
1.5.7 Testability
The LSI53C895A provides improved testability through:
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Access to all SCSI signals through programmed I/O.
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SCSI loopback diagnostics.
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SCSI bus signal continuity checking.
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Support for single step mode operation.
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JTAG boundary scan.