Visible to Intel only — GUID: nik1409872142174
Ixiasoft
Visible to Intel only — GUID: nik1409872142174
Ixiasoft
1.1.4.3.2. CMU PLL
In Arria V devices, if you do not use the channel PLL as a CDR, you can independently configure every channel PLL as a CMU PLL for clocking the transceivers.
The CMU PLL operates only in lock-to-reference (LTR) mode and supports the full range of data rates.
Using the input reference clock, the CMU PLL synthesizes the serial clock with a frequency that is half of the data rate. The CMU PLL output serial clock feeds the clock divider that resides in the transmitter of the same transceiver channel. Depending on the channel location in a transceiver bank, the CMU PLL of channels 1 and 4 feeds the output clock to the x1 clock lines.