Manual - FuturePlus Systems

FieldEOFtypS_IDD_IDPrimtvAL_PAs20sDescriptionA 3 bit field that encodes the type and class of service for EOF primitives. It Is valid duringthe states when WrdTyp is EOF.A 24 bit field that holds the S_ID field from the frame header. This field is only definedduring the states when WrdTyp is SOF/Node_IDs.A 24 bit field that holds the D_ID field from the frame header. This field is only definedduring the states when WrdTyp is SOF/Node_IDs.This field is valid when WrdTyp is Primitive, it indicates the type of primitive on the link.16 bit field that holds 2 Arbitrated loop Physical Address fields. This field can be used toidentify primitives such as ARB that contain specific AL_PAs. It is only valid during thestates when WrdTyp is Primitive.A single bit field that is normally zero. Approximately every 20 seconds, this field is a onefor a single cycle of the unique (J) clock. It is useful for preserving time correlation bypreventing ambiguity in the logic analyzers time information (see page 38 for more detail).These labels are provided to simplify the specification of triggerevents and storage qualifiers. Note that some of the fields in alabel “overlap” each other (that is, share bits of a pod). This isbecause the information passed from the Bus Analysis probe tothe logic analyzer is context (state) dependent. In general thevalue of the WrdTyp (Word Type) label in a particular statedetermines which other labels are valid in that state. Forinstance, during a state that represents a SOF (characterized bya WrdTyp of SOF/Node_IDs,) the S_ID and D_ID fields areactive and the fields they overlap, DATA and Count are not.During a state when WrdTyp is Primitive, however, the S_ID andD_ID fields are not active and the DATA and Count fields are.As a consequence some care must be taken when specifyingtrigger conditions to ensure that terms are qualified with otherlabels so that they are only valid in the correct state. Forexample, consider specifying a term, in the trigger menu, totrigger on a frame with a particular source and destination ID.As described above the S_ID and D_ID fields are only valid witha WrdTyp of SOF/Node_IDs. Therefore the trigger term has tobe specified with both a WrdTyp of SOF/Node_IDs and thevalues for the source and destination nodes in the S_ID andD_ID fields respectively.Note also that as the D_ID field overlaps the Count field, placinga value in the D_ID field specified will also cause a value toshow in the Count field.The table below summarizes the validity of the format labelsduring the various WrdTyp states.For a full list of available labels and related symbols either lookunder the FORMAT section of the logic analyzer once theFS4300 software is loaded or see Appendix A.20