Octal Selection, Channel Selection, Line Rate, and REFCLK - 3.6 English

7 Series FPGAs Transceivers Wizard (PG168)

Document ID
PG168
Release Date
2022-05-19
Version
3.6 English

Page 1 of the Wizard (This Figure) allows you to select the component name and determine the line rate and reference clock frequency. In addition, this page specifies a protocol template.

1.In the Component Name field, enter a name for the Wizard instance. This example uses the name caui4_wrapper.

2.In the GT_Type field, select GTZ. The type of transceiver depends on the device chosen in Project Options.

3.Select one or both of the octals GTZE2_OCTAL0 or GTZE2_OCTAL1. The number of available octals depends on the target device and package.

Figure 4-5:      Line Rates and Transceiver Selection—GTZ Page 1

X-Ref Target - Figure 4-5

pg168_viv_line_rate_gt_selection.png

4.Select the multichannel mode if you wish to set the octal in one of the multichannel modes. Selecting a mode here will automatically select the channels appropriately also. If using one of the multichannel modes, use the Master Slave mode to enable one of the channels as the master and the other as slaves.

5.The GTZ wizard supports both identical configuration and non-identical configuration of channels within an octal. To configure identically, select the Configure all selected GTZ channels identically checkbox.

6.Select Start from scratch if you wish to manually set all parameters. Select one of the available protocols from the list to begin designing with a predefined protocol template. The CAUI4 example uses the CAUI 4 protocol template. The CAUI 4 protocol template uses four channels.

7.Use Table: Line Rate and REFCLK Settings—GTZ Transceivers to determine the line rate and reference clock settings. The line rate allowed is dependent on the speed grade of the device:

°For -2G speed grade: 9.8 Gb/s – 14.025 Gb/s and 19.6 Gb/s – 28.05 Gb/s

°For other speed grades: 9.8 Gb/s – 12.890625 Gb/s and 19.6 Gb/s – 25.78125 Gb/s

Table 4-1:      Line Rate and REFCLK Settings—GTZ Transceivers

Options

Description

Line Rate

Set to the desired target line rate in Gb/s. Should be the same for both TX and RX. The CAUI4 example uses 25.78125 Gb/s.

Reference Clock Source

Select either REFCLK0 or REFCLK1.The CAUI4 example uses REFCLK0.

REFCLK0 Source

Select from the list of the optimal reference clock frequency to be provided by the application. The CAUI4 example uses 322.266 MHz.

REFCLK1 Source

Select from the list of the optimal reference clock frequency to be provided by the application.The CAUI4 example uses 322.266 MHz.