XEM7350
Clock Oscillators
Note: The clocks described here are separate and not synchronous to the clock provided by the USB host interface.
200 MHz Oscillator (Fabric)
A fixed-frequency, 200 MHz, low-jitter oscillator is included on-board and outputs LVDS to the FPGA on bank 34. The Kintex-7 FPGA can produce a wide range of clock frequencies using the on-chip DCM and PLL capabilities. An external termination resistor is provided for this clock so internal termination is not necessary.
| 200 MHZ PIN | FPGA PIN |
|---|---|
| LVDS + | AC4 |
| LVDS – | AC3 |
Details of the oscillator are shown below. Please note that this specific model number is subject to change and an approximate substitute may be used depending on availability.
| MANUFACTURER | AVX |
|---|---|
| MANUFACTURER P/N | KC7050Y200.000L30EZU |
| OSCILLATOR TYPE | SAW Clock Oscillator |
| DETERMINISTIC JITTER | 0.2 ps typical |
| 1 SIGMA JITTER | 2 ps typical |
| PEAK TO PEAK JITTER | 20 ps typical |
100 MHz Oscillator (Transceivers)
A second 100 MHz oscillator is available to the transceiver portions of the FPGA as a reference.
| 100 MHZ PIN | FPGA PIN |
|---|---|
| LVDS + | K6 |
| LVDS – | K5 |