Avago Technologies LSI53C825AE - Manual (Page 22)

1-8 Introduction
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TolerANT technology 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
•
JTAG Boundary scan support (LSI53C825AJ only)
1.4.7 Testability
The LSI53C825A contains these testability features:
•
All SCSI signals accessible through programmed I/O
•
SCSI loopback diagnostics
•
SCSI bus signal continuity checking
•
Support for single-step mode operation
•
Test mode (AND tree) to check pin continuity to the board (most
package options)
•
JTAG Boundary scan support (LSI53C825AJ only)
A system diagram showing the connections of the LSI53C825A with an
external ROM or Flash memory is pictured in
Figure 1.1 . A block diagram
of the LSI53C825A is pictured in Figure 1.2 .