Altera V-Series Avalon-MM DMA User Manual

Page 128

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Figure 9-4: Specifying the Number of Transceiver Interfaces for Arria V and Cyclone V Devices

The Transceiver Reconfiguration Controller includes an Optional interface grouping parameter.

Transceiver banks include six channels. For a ×4 variant, no special interface grouping is required because

all 4 lanes and the TX PLL fit in one bank.
Note: Although you must initially create a separate logical reconfiguration interface for each lane and TX

PLL in your design, when the Quartus II software compiles your design, it reduces the original

number of logical interfaces by merging them. Allowing the Quartus II software to merge reconfi‐

guration interfaces gives the Fitter more flexibility in placing transceiver channels.

Note: You cannot use SignalTap to observe the reconfiguration interfaces.

Transceiver Reconfiguration Controller Connectivity for Designs Using

CvP

If your design meets the following criteria:
• It enables CvP

• It includes an additional transceiver PHY that connect to the same Transceiver Reconfiguration

Controller

then you must connect the PCIe

refclk

signal to the

mgmt_clk_clk

signal of the Transceiver Reconfigu‐

ration Controller and the additional transceiver PHY. In addition, if your design includes more than one

Transceiver Reconfiguration Controller on the same side of the FPGA, they all must share the

mgmt_clk_clk

signal.

For more information about using the Transceiver Reconfiguration Controller, refer to the Transceiver

Reconfiguration Controller chapter in the Altera Transceiver PHY IP Core User Guide.

9-4

Transceiver Reconfiguration Controller Connectivity for Designs Using CvP

UG-01154

2014.12.18

Altera Corporation

Transceiver PHY IP Reconfiguration

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