420 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
26 CXPI Triggering and Serial Decode
• Frame ID — triggers on a user-defined Frame ID at the end of the PID byte.
The Frame ID value is user-defined, 7 bits, and has bitwise don't-cares. You
can specify whether to trigger on PTYPE present or no PTYPE present.
• Frame ID, Info and Data — triggers on CXPI frames at the end of the last data
byte defined in the trigger. In addition to the PID value, you can specify the
contents of the Frame Info byte with bitwise don't-cares. You can specify up
to 12 data bytes on which to trigger with bitwise don't-cares.
• Frame ID, Info and Data (Long Frame) — triggers on CXPI frames at the end of the
last data byte defined in the trigger. The standard DLC field will be locked to
1111b. You can specify up to 12 bytes of data on which to trigger and specify
the start byte number as an offset. The offset can be up to 123 bytes when
PTYPE is present or 124 bytes when PTYPE is not present.
• CRC Field Error — triggers when the calculated CRC does not match the
transmitted CRC. You can optionally filter by Frame ID and PTYPE as in the
Frame ID trigger.
• Parity Error — triggers when the parity bit in the PID or PTYPE field is not
correct.
• Inter-Byte Space Error — triggers when there are more than 9 bits between
consecutive bytes in a frame. You can optionally filter by Frame ID and
PTYPE as in the Frame ID trigger.
• Inter-Frame Space Error — triggers when there are fewer than 10 idle bits
before a new frame begins.
• Framing Error — triggers when the stop bit of a byte is not logical 1. You can
optionally filter by Frame ID and PTYPE as in the Frame ID trigger.
• Data Length Error — triggers when there are more data bytes in a frame than is
indicated by the DLC or Extended DLC field. You can optionally filter by
Frame ID and PTYPE as in the Frame ID trigger.
• Sample Error — triggers when 10 consecutive logical 0s are detected.
• All Errors — triggers on all CRC, Parity, IBS, Stop Bit, Data Length, and
Sample errors.
• Sleep Frame — triggers when a normal frame is transmitted matching the
definition of a sleep frame in the CXPI specification.
• Wakeup Pulse — triggers when a wakeup pulse is detected.
4 For the trigger types that let you trigger on data, press the Bits softkey. In the
CXPI Bits Menu, you can specify ID, Frame Info, and Data values to trigger on:
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