Teledyne LeCroy Serial Data Debug Solutions - Manual (Page 80)

Serial Data Debug Solutions
80 919586 RevA
FlexRaybus Trigger Setup Detail
The following topic provides specific control settings for a FlexRaybus Trigger.
All Trigger Setups use Source Setup, FlexRay Setup, and Trigger Type fields.
Other fields vary based on the Trigger Type Selections as follows:

TSS (Start) and FrameTriggers have Setup Format fields.

Frame Trigger has Setup Format , Frame ID Setup , Cycle Count , and Frame Qualifier fields.

Symbol Trigger has Trigger On and System Parameters fields.

Errors Trigger has Protocol and CRC Errors fields.
Previously numbered FlexRaybus trigger sections correspond with the following explanations.
1. S OURCES S ETUP

DATA - The pop-up dialog is used to select the appropriate channel or EXT input for each. Set this field up
with caution or your trigger may not function correctly.

Threshold (Trigger)High, Low, and Find - Adjust the vertical level thresholds for the trigger. FlexRay is a
tri-level signal and requires 2 voltage threshold settings which enable the oscilloscope to distinguish
between 1 and 0.
Like an Edge trigger, the level must be specified to process the incoming signals and determine if the
desired serial data pattern meets the set trigger condition.
If desired, use the automated Find Threshold button to detect and set appropriate thresholds.
2. F LEX R AY S ETUP

Bitrate - The FlexRay trigger can be configured to trigger on FlexRay signals at 2.5 Mb/s, 5 Mb/s and 10
Mb/s as defined in the FlexRay specification.
3. T RIGGER T YPE
The FlexRay trigger can be configured to trigger on simple TSS (Start), FlexRay Frame (ID, Cycle Count,
Frame Qualifiers), FlexRay Symbols (CID, CAS/MTS and Wakeup Pattern), and Error Frame triggering is
supported for FSS, BSS and FES, Header CRC and Payload CRC errors.
Select the Trigger Type desired. The trigger dialog dynamically changes based on the selection made in
the following manner:

TSS (Start) - When selected, the Setup Format fields are shown and enabled. However, the Frame ID
Setup, Cycle Count, and Frame Qualifiers fields, while shown, are disabled.