Teledyne LeCroy FireInspector - Users Manual - Manual (Page 12)

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CATC F IRE I NSPECTOR 2.01 C HAPTER 1
User’s ManualFireInspector Overview
detection of, and triggering on, numerous events. Such events include specific user-defined
bus conditions, PHY packets, any packet header information, data patterns, and many
abnormal (error) bus conditions. When recording manually or with a specified trigger
condition, the FireInspector analyzer continuously records the bus data in a wrap-around
fashion until manually stopped or until the trigger event is detected and a specified
post-trigger amount of bus data is recorded.
Upon detection of a triggering event, the analyzer continues, as necessary, to record data
(post-trigger) up to a point specified by the user. Real-time event detectors can be
individually enabled or disabled to allow triggering on bus events, as the events happen.
This includes predefined exception or error conditions, and a user-defined set of search
conditions. The unit can also be triggered by an externally supplied signal. An external
DB-37 connector provides a path for externally supplied data or timing information to be
recorded along with bus traffic.
Real-time event detection information is available via an external DB-37 connector, making
many control, timing, and recovered signals available externally. These signals can be
probed and used by other circuitry.
The FireInspector application may be used with or without the analyzer box. When used
without the analyzer box, it functions as a Trace™ viewer. As a Trace viewer, it can be used
to view, analyze and print CATC Trace files.
1.1 IEEE 1394 Bus Version
The FireInspector IEEE analyzer supports the cable version of the IEEE 1394 bus. The IEEE
1394 designation refers to a high performance serial bus and defines both a serial backplane
physical layer and a point-to-point cable-connected virtual bus. The cable version supports
data rates of 100, 200 and 400 Mbits/s across the cable medium.
The primary application of the cable version is the integration of Input/Output (I/O)
connectivity at the back panel of personal computers using a low-cost, scalable, high-speed
serial interface. The IEEE 1394 standard also provides for real-time I/O and live
connect/disconnect capability for external devices like disk drives and printers, and
peripherals such as scanners and cameras.
The IEEE 1394 standard is a transaction-based packet technology operating on a serial bus
and is organized as if it were memory space interconnected between devices. Device
addressing is 64-bits wide, partitioned as 10 bits for network IDs, 6 bits for node IDs and 48
bits for memory addresses. The result is the capability to address 1023 networks of 63 nodes,
each with 128 terabytes of memory.