IPR-PCIE/8 Altera, IPR-PCIE/8 Datasheet - Page 135

• 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

External PHYs
Figure 4–1. 16-bit SDR Mode
Altera Corporation
December 2006
External connection in user logic
clk125_out
clk125_in
refclk
16-bit SDR Mode with a Source Synchronous TxClk
The implementation of the 16-bit SDR mode with a source synchronous
TxClk is shown in
<variation name>.v or <variation name>.vhd. In this mode the following
clocking scheme is used:
■
■
■
refclk is used as the clk125_in for the core
refclk clocks a single data rate register for the incoming receive
data
refclk clocks the Transmit Data Register (txdata) directly
rxdata
txdata
PCI Express Compiler Version 6.1
Mode 1
Q
Q
Q 4
Q
PLL
A
D
1
1
4
125Mhz SDR Mode without txclk
Figure 4–2
ENB
ENB
ENB
Q 1
Q 4
D
D
A
A
clk125_early
and is included in the file
A
D
ENB
tlp_clk_62p5
Q 1
Q 4
PCI Express Compiler User Guide
PCIe IP MegaCore
clk125_in
tlp_clk
refclk
clk125_out
4–3