In bonded configurations, the receiver standard PCS requires both the parallel clock (recovered) and parallel clock from the clock divider.
In bonded configurations, the receiver 10G PCS uses only the parallel clock (recovered) for all its blocks.
Figure 67. Four Receiver Channels Configured in Bonded Duplex ConfigurationThe figure shows four channels in a transceiver bank configured in bonded configuration, using the receiver standard PCS. The receiver PCS uses both the parallel clock (recovered) and parallel clock from the clock divider. The parallel clock from the clock divider is generated by the central clock divider for the transmitter PCS. It also drives some blocks in the receiver PCS, depending on the configuration you use.
The following shows all six channels in the transceiver bank in bonded configuration, as opposed to a maximum of four, shown in the previous figure. Six channel bonding is possible because the ATX PLL is used as a transmitter PLL instead of a channel PLL in the transceiver bank. Using the ATX PLL or fractional PLL allows you to use the channel PLLs of both channels 1 and 4 as CDRs to perform receiver operations.
Note: For more information about the clocking scheme used in different configurations, refer to the Transceiver Configurations in Stratix V Devices chapter.
Figure 68. Six Channels Configured in Bonded Configuration Using ATX PLL