The super clock module is an add on board with programmable clock functionality that can provide a large selection of clock frequencies for use as a reference clock for transceivers. There are currently 2 different types of super clock modules available:

1. XGI SuperClock Module
2. SuperClock-2 Module

XGI SuperClock Module

The XGI SuperClock Module connects to a ML52x and ML42x GT characterization boards using a Xilinx Generic Interface connector (XGI). The output clock frequencies are selected using a dip switch to set the M/D values. To learn more information on how to use this board, please visit the XGI SuperClock Module Users guide:

UG091 - Xilinx Generic Interface (XGI) SuperClock Module User Guide

SuperClock-2 Module

The SuperClock-2 Module connects to various GT characterization boards (including the ML628, ML623, and SP623) using a QSH host interface connector. The SuperClock-2 Module is much more flexible than the previous generation and uses a I2C interface to configure the frequency of the output clocks.

The ML628, ML623, SP623, and KC724 development boards include an IBERT reference design (a ready made bit file) that includes a VIO core that controls the I2C interface to configure the output clocks for your needs.

To use the SuperClock-2 Module, you will need the bit file that comes with the IBERT reference design for your targeted development board

1. Open ChipScope Analyzer and open the project file (.prj) that came with the IBERT reference design
2. Configure the design with the bitstream that came in the IBERT reference design
3. The VIO console should be open after configuration completes
4. Consult the table at the bottom of the page to determine the address necessary to target the frequency desired on the outputs
5. Enter in the address you determined from step 4 into the Si5368 Rom Addr field. Verify that the Si6368 ROM Freq (MHz) value changed to the frequency desired
6. Click on the pulse button next to Si5368 Start
7. Verify that the Si5368 Done LED has transitioned

As long as the board is not powered off, the SuperClock-2 module will continue to operate at the desired frequency. Configuring the part will not change the state of the outputs for the SuperClock-2 Module. This means that if it is desired to use a custom IBERT core, you can first configure with the IBERT reference design to start the clock at the desired frequency, then configure with thecustom IBERT design without losing the SuperClock-2 Module operation.

For more information on the SuperClock-2 Module, refer to the SuperClock-2 Module User Guide:

UG770 - HW-CLK-101-SCLK2 SuperClock-2 Module User Guide

SuperClock-2 address/frequency table