IPR-PCIE/8 Altera, IPR-PCIE/8 Datasheet - Page 88

• Manufacturer Part Number: IPR-PCIE/8
• Description: IP CORE Renewal Of IP-PCIE/8
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IPR-PCIE/8

• Software Application: IP CORE, Interface And Protocols, PCI
• Supported Families: Arria GX, Cyclone II, HardCopy II, Stratix II
• Core Architecture: FPGA
• Core Sub-architecture: Arria, Cyclone, Stratix
• Rohs Compliant: NA
• Function: PCI Express Compiler, x8 Link Width
• License: Renewal License
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

Signals
3–50
PCI Express Compiler User Guide
0
9:1
10
11
12
21:13
tx_cred[7:0]
tx_cred[19:8]
tx_cred[27:20]
Table 3–25. tx_cred0[21:0] Bits for the x1 and x4 MegaCore Functions
Table 3–26. tx_cred[65:0] bits for x8 MegaCore Function (Part 1 of 2)
Bit
●
●
●
●
●
●
●
●
●
●
●
9 bits permit advertisement of 256 credits,
which corresponds to 4 KBytes, the
maximum payload size.
Bit
0: No credits available
1: Sufficient credit available for at least 1
transaction layer packet
0: No credits available
1-256: number of credits available
257-511: reserved
0: No credits available
1: Sufficient credit available for at least 1
transaction layer packet
0: No credits available
1: Sufficient credit available for at least 1
transaction layer packet
0: No credits available
1: Sufficient credit available for at least 1
transaction layer packet
●
●
●
●
●
●
●
0 No credits available
1 Sufficient credit available for at least 1
TLP
0: No credits available
1: Sufficient credit available for at least 1
TLP
0: No credits available
1-256: number of credits available
257-511: reserved
Value
Table 3–25
and x4 MegaCore functions.
Table 3–26
MegaCore functions.
PCI Express Compiler Version 6.1
Value
shows the bit information for tx_cred0[21:0] for the x1
shows the bit information for tx_credn[65:0] for the x8
Posted header.
Posted data: 9 bits permit advertisement of 256 credits,
which corresponds to 4KBytes, the maximum payload
size.
Non-Posted header.
Non-Posted data.
Completion header.
Completion data, posted data.
Posted header
Ignore this field if the value of Posted
Header credits,
to 1.
Posted Data: 9 bits permit advertisement
of 256 credits, which corresponds to 4KB,
the Maximum Payload Size. Ignore this
field if value of the Posted Data credits,
tx_cred[61]
Non-Posted Header
Ignore this field if value of the Non-Posted
Header credits,
Description
Description
tx_cred[60]
, set to 1.
tx_cred[62]
Altera Corporation
December 2006
, are set
, set to 1.