The Sub GUI Configuration tab provides customization options for fundamental
transceiver features, and transmitter and receiver settings. Each Sub GUI configuration
corresponds to a target transceiver configuration referred to as CONFIG<0/1...> in the
Protocols panel. The target configuration could be selected by controlling the ch*_txrate[7:0] or ch*_rxrate[7:0]
ports on the wizard. Multiple line rate settings require multiple Sub GUI configurations. The
tab is shown in the following figure:
- Protocols
- Click the + button to add the new CONFIGx. Each CONFIG corresponds to a sub GUI.
- Transceiver configuration preset
- Standard protocol preset can be loaded from the list of presets.
CONFIG options additions are incremental. Every time you click + button, the next CONFIG options (for example, CONFIG 1, CONFIG 2, and so on) are added. Likewise CONFIG options deletions are decremental. Every time you click the "-" button, previous CONFIG options (for example, CONFIG N, CONFIG N-, and so on) are deleted. Random CONFIG options are not allowed. If a user changes the preset value in the sub GUI while selecting GT direction to be Simplex (say Simplex TX), the sub GUI shows both TX and RX configuration fields. User can customize TX configuration fields, but also needs to enter valid values in RX configuration fields to generate the core. However, the core generation rules are based on the GT direction entered in the main GUI (in this case, it is Simplex TX).
- Configurations
- GT transceiver and receiver settings like line rate, GT Type, and Reference clock frequency can be selected.
- Reference Clock Frequency
- It has user reference clock frequency input. The actual reference clock frequency is calculated based on the user reference clock input.
- Requested Reference Clock Source
- Six logical reference clock inputs from R0 – R5 should be given
sequentially. Based on user selection across various line rates, wizard assigns the
sorted-out reference clock ports (GTREFCLK0-5) and the frequency to be driven on these
clock ports. Summary.log in the IP Sources area provides clock port and frequency
assignment and Table Summary of CONFIG information. Sample summary.log is given in the
following figure.Figure 2. Sample Summary Log
The Sub GUI Configuration tab for GTME5 is as follows.
Figure 3. Sub GUI Configuration tab for GTME5
- Active PMA Lane Selection
- In the case of GTME5 configurations requiring user data widths of 320/512, only one PMA lane is used in a dual. This GUI selection allows users to choose the required active PMA lanes in the Quad.