User manual

Serial Data Debug Solutions
168
919586 RevA
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 PCIEbus (some have long and short forms) include the following (some
annotations are not shown in the screen-shot):
PCIEbus Decode Annotations
Decode annotations unique to PCIe include the following:
TS1, TS2, SKIP, DLLP, TLP, EIOS, EIEOS, and FTS.
The following annotations have long and short forms:
 EI - Electrical Idle or Error
 ? - Unrecognized
 Comp - Compliance
 MComp - Modified Compliance
 CompD - Compliance Delayed
 MCompD - Modified Compliance Delayed
 IDL - Logical Idle
PLEASE NOTE THE FOLLOWING:
 Compliance annotations appear at 2.5 and 5GT/s.
 At 8GT/s, both Compliance and Modified Compliance appear simply as blocks of Logical Idle separated by
EIEOS, and in Modified Compliance, by SKP Ordered Sets.
 In Compliance, the repeating pattern is one EIEOS followed by 32 Data Blocks of IDL.
 In Modified Compliance, after the EIEOS, there are 256 Data Blocks of IDL, then 255 repetitions of: SKP
Ordered Set followed by 256 Data Blocks of IDL. The state can be determined from the Details annotation
for the SKP Ordered Set. There is no concept of delayed compliance at 8GT/s, instead each lane has a
unique initialization of its LFSR.
 Specifications are subject to change without notice.
PCIEbus Decode Table Column Details
The table shows details about the contents but does not show the value of every byte. If a line on the table is
touched, a zoom (typically Z1) appears showing the region of the waveform corresponding to that line of the
table. The rectangle on the zoom trace spans almost the entire width of the screen, and so all possible
annotation appears in the rectangle on the Zoom trace. The Zoom trace can be zoomed out – or in – after it is
automatically positioned, like any normal Zoom trace. The annotation on the Zoom trace updates.
Once you've setup a basic PCI Express decode by:
 Touching Analysis → Serial Decode.
 Selecting PCI Express as the Protocol for one of your Decodes on the main Serial Decode dialog.
 Set your Source 1 DATA as desired for your PCI Express Decode on the Decode Setup dialog.
 Viewing the Table by touching the View Table checkbox on the Decode Setup dialog.