• PFs Max Payload Size: This field indicates the maximum payload size that the device or
function can support for TLPs. This is the value advertised to the system in the Device
Capabilities Register.
• Extended Tag Field: This field indicates the maximum supported size of the Tag field. The
options are:
• When selected, 8-bit Tag field support (256 tags)
• When deselected, 5-bit Tag field support (32 tags)
• 10-bit Tag Requester Support: This field indicates the maximum supported size of the Tag
field as a Requester. The options are:
• When selected, 10-bit Requester Tag field support (768 tags)
• When deselected, 8-/5-bit Tag supported, depending on Extended Tag Field selection
• Enable Slot Clock Configuration: Enables the Slot Clock Configuration bit in the Link Status
register.
• When this option is selected, the link is synchronously clocked.
• When this option is deselected, asynchronous clock in SRNS mode is supported. SRNS
refers to a separate reference clock with No SSC (an asynchronous clock without SRIS
support).
PF IDs Tab
The following figure shows the Identity Settings parameters.
Chapter 5: Design Flow Steps
PG346 (v3.3) November 16, 2022
CPM Mode for PCI Express
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