User guide

Each transmitter channel has a local clock generation block (CGB). For non-bonded channel configura‐
tions, the serial clock generated by the transmit PLL drives the local CGB of each channel. The local CGB
generates the parallel clock used by the serializer and the PCS.
There are two standalone master CGBs within each transceiver bank. The master CGB provides the same
functionality as the local CGB within each transceiver channel. The output of the master CGB can be
routed to other channels within a transceiver bank using the x6 clock lines. The output of the master CGB
can also be routed to channels in other transceiver banks using the xN clock lines. Each transmitter
channel has a multiplexer to select its clock source from either the local CGB or the master CGB.
UG-01143
2015.05.11
Clock Generation Block
3-37
PLLs and Clock Networks
Altera Corporation
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