IP-PCIE/1 Altera, IP-PCIE/1 Datasheet - Page 322

• Manufacturer Part Number: IP-PCIE/1
• Description: IP CORE - PCI Express X1 Lane
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IP-PCIE/1

• 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, x1 Link Width
• License: Initial License
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

B–16
Table B–9. tx_cred0[21:0] Bits for the ×1 and ×4 IP cores (Part 2 of 2)
Table B–10. tx_cred[65:0] Bits for ×8 IP core
PCI Express Compiler User Guide
[11]
[12]
[21:13]
tx_cred[7:0]
tx_cred[19:8]
tx_cred[60]
tx_cred[61]
tx_cred[62]
tx_cred[63]
tx_cred[64]
tx_cred[65]
tx_cred[27:20]
tx_cred[39:28]
tx_cred[47:40]
tx_cred[59:48]
Bits
Bits
■
■
■
■
9 bits permit advertisement of 256
credits, which corresponds to 4 KBytes,
the maximum payload size.
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
Table B–10
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
0-127: Number of credits available
>127: No credits available
0-127: Number of credits available
>127: No credits available
0–127: Number of credits available
>127: No credits available
0: Posted header credits are not infinite
1: Posted header credits are infinite
0: Posted data credits are not infinite
1: Posted data credits are infinite
0: Non-Posted header credits are not infinite
1: Non-Posted header credits are infinite
0: Non-posted data credits are not infinite
1: Non-posted data credits are infinite
0: Completion credits are not infinite
1: Completion credits are infinite
0: Completion data credits are not infinite
1: Completion data credits are infinite
0-2047: Number of credits available
>2047: No credits available
0-2047: Number of credits available
>2047: No credits available
0-2047: Number of credits available
>2047: No credits available
Value
shows the bit information for tx_cred <n> [65:0] for the ×8 IP cores.
Value
Non-Posted data.
Completion header.
Completion data, posted data.
Posted header. Ignore this field if the value of
posted header credits, tx_cred[60], is set to
1.
Posted data. Ignore this field if the value of
posted data credits, tx_cred[61], is set to 1.
Non-posted header. Ignore this field if value of
non-posted header credits, tx_cred[62], is
set to 1.
Non-posted data. Ignore this field if value of
non-posted data credits, tx_cred[63], is set
to 1.
Completion header. Ignore this field if value of
CPL header credits, tx_cred[64], is set to 1.
Completion data. Ignore this field if value of
CPL data credits, tx_cred[65], is set to 1.
Posted header credits are infinite when set to
1.
Posted data credits are infinite.when set to 1.
Non-posted header credits are infinite when set
to 1.
Non-posted data credits are infinite when set to
1.
Completion header credits are infinite when set
to 1.
Completion data credits are infinite when set to
1.
Description
December 2010 Altera Corporation
Description
Descriptor/Data Interface
Chapter :