Arria® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683213
Date 10/18/2023
Public
Document Table of Contents

6.2.3.2. Guideline: Using DPA-Disabled Differential Channels

If you use DPA-disabled channels, adhere to the following guidelines.

DPA-Disabled Channel Driving Distance

Each PLL can drive all the DPA-disabled channels located in the entire bank .

Using Corner and Center PLLs

You can use a corner PLL to drive all transmitter channels and a center PLL to drive all DPA-disabled receiver channels in the same I/O bank. You can drive a transmitter channel and a receiver channel in the same LAB row by two different PLLs. A corner PLL and a center PLL can drive duplex channels in the same I/O bank if the channels that are driven by each PLL are not interleaved. You do not require separation between the group of channels that are driven by the corner and center, left and right PLLs. Refer to the following figures.

Figure 137. Corner and Center PLLs Driving DPA-Disabled Differential I/Os in the Same Bank
Figure 138. Invalid Placement of DPA-disabled Differential I/Os Due to Interleaving of Channels Driven by the Corner and Center PLLs

Using Both Center PLLs

You can use both center PLLs simultaneously to drive DPA-disabled channels on left and right I/O banks. Unlike DPA-enabled channels, the center PLLs can drive DPA-disabled channels cross-banks in the Arria® V GX, GT, SX, and ST devices. For example, the left center PLL can drive the right I/O bank at the same time the right center PLL is driving the left I/O bank, and vice versa, as shown in the following figure.

Note: In the Arria® V GZ devices, the center PLLs cannot drive DPA-disabled channels cross-banks.
Figure 139. Both Center PLLs Driving Cross-Bank DPA-Disabled Channels Simultaneously in Arria V GX, GT, SX, and ST Devices

Using Both Corner PLLs

You can use both corner PLLs to drive DPA-disabled channels simultaneously. You can use a corner PLL to drive all the transmitter channels and the other corner PLL to drive all the DPA-disabled receiver channels in the same I/O bank. Both corner PLLs can drive duplex channels in the same I/O bank if the channels that are driven by each PLL are not interleaved. You do not require separation between the groups of channels that are driven by both corner PLLs.

Figure 140. Right Corner PLLs Driving LVDS Differential I/Os in the Same Bank