3.3.4. Tag Allocation
The F-Tile PCIe Hard IP supports the 10-bit tag Requester capability in the x16 Controller (Port 0) only. It supports up to 512 outstanding Non-Posted Requests (NPRs) with valid tag values ranging from 256 to 767.
By default, the x16 (Port0) controller supports 10-bit tag Requester capability. The x8 (Port 1) and x4 Controllers (Port 2/3) don’t support the 10-bit tag Requester capability, although they support the 10-bit Completer capability. Both x8 and x4 Controllers can allow up to 256 outstanding NPRs with valid tag values ranging from 0 to 255 .
- 8-bit tags : 0 - 63
- 10-bit tags : 320 - 511, 576 - 767
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