Teledyne LeCroy Serial Data Debug Solutions - Manual (Page 192)

Serial Data Debug Solutions
192 919586 RevA
USB3 Decode Trace Annotations
Like all trace annotations, USB3 Decode annotations are rectangular shadings used to highlight messages on
decoded waveforms for easy viewing.
Tip: Data packets (or messages) on properly decoded protocol signals can be viewed using Serial Decode Trace
Annotations (on page 18), the Protocol Results Table (on page 19), and/or by Searching for Messages (on
page 21) (Types and Subtypes). Using these tools together provides fast insight to your data. See Serial Decode
Trace Annotations (on page 18) for more information.
Messages shown as annotations, table columns, and search types for most protocols are classified into Frames,
Errors, Unknown, or Grouped Primitives specific to the protocol. Sub Types then further classify each main
message type into more protocol-specific messages.
Decode annotations unique to USB3 include the following (some annotations are not shown in the screen-shot):
USB3 Decode Annotations

LMP - Link Management Packet

TP - Transition Packet

DPH - Data Packet Header

ITP - Isochronous Timestamp Packet

DPP - Data Packet Payload

Link Command - An eight symbol sequence used for link-level flow control, retries, power management,
and device removal.

TS1 - Training Sequence 1, a type of ordered set.

TS2 - Training Sequence 2, a type of ordered set.

TSEQ - Training Sequence

SKIP - A K code indicating a skip.

Idle - Period of one or more symbol times when no information (packets or link commands) is being
transmitted.

E.Idle - Electrical Idle is a steady state condition where the transmitter Txp and Txn voltages are held
constant at the same value.

LFPS - Low Frequency Periodic Signaling

Protocol Error - A stored or transmitted result is compared to a CRC calculated from the data to
determine if an error has occurred.
Note: Specifications are subject to change without notice.