December 2013 Altera Corporation Cyclone V Hard IP for PCI Express
User Guide
A. Transaction Layer Packet (TLP) Header
Formats
Table A–1 through Table A–9 show the header format for TLPs without a data
payload.
TLP Packet Format without Data Payload
\
Table A–1. Memory Read Request, 32-Bit Addressing
+0 +1 +2 +3
76543210765432107 6 5 4 321076543210
Byte 0 000000000
TC
0000
TD EP Attr AT Length
Byte 4
Requester ID Tag Last BE First BE
Byte 8
Address[31:2]
00
Byte 12 Reserved
Table A–2. Memory Read Request, Locked 32-Bit Addressing
+0 +1 +2 +3
76543210765432107 6 54321076543210
Byte 0 000000010TC 0000TD EP Attr
AT
Length
Byte 4
Requester ID Tag Last BE First BE
Byte 8
Address[31:2]
00
Byte 12
Reserved
Table A–3. Memory Read Request, 64-Bit Addressing
+0 +1 +2 +3
76543210765432107 6 54321076543210
Byte 0 001000000
TC
0000
TD EP
Att
r
AT Length
Byte 4
Requester ID Tag Last BE First BE
Byte 8
Address[63:32]
Byte 12
Address[31:2]
00
Table A–4. Memory Read Request, Locked 64-Bit Addressing
+0 +1 +2 +3
76543210765432107 6 54321076543210
Byte 0 001000010
TC
0000
TEP
Att
r
AT Length
Byte 4
Requester ID Tag Last BE First BE
Byte 8
Address[63:32]
Byte 12
Address[31:2]
00
December 2013
UG-01110-1.5
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