220.127.116.11. Channel PLL Used as a CMU PLL (Transmitter PLL)
The channel PLL available in the PMA can be used as a CMU PLL. The CMU PLLs in channels 1 and 4 in a transceiver block can also provide a clock to the other transceivers within the same block.
When you use the channel PLL as a CMU PLL, that particular channel cannot be used as a receiver; however, that channel can be used as a transmitter in conjunction with a different transmitter PLL. If all transmitters and receivers within the transceiver block are required, you must use an ATX PLL or a clock from another transceiver block.
For the best performance based on the data rate and input clock frequency, all settings for the CMU PLL and clock dividers are automatically chosen by the Quartus II software.
Did you find the information on this page useful?