6.6.1. Onboard Oscillators
Figure 36. Arria® 10 GX FPGA Development Board Clock Inputs and Default Frequencies
| Source | Schematic Signal Name | Frequency (MHz) | I/O Standard | Arria® 10 FPGA Pin Number | Application |
|---|---|---|---|---|---|
| U14 | REFCLK_SMA_P | 302.083333 | 1.8 V LVDS | N37 | Transceiver reference clocks Bank-1H |
| REFCLK_SMA_N | 1.8 V LVDS | N38 | |||
| REFCLK_FMCB_P | 625 | 1.8 V LVDS | AA8 | FMC B reference clocks | |
| REFCLK_FMCB_N | 1.8 V LVDS | AA7 | |||
| REFCLK_FMCA_P | 625 | 1.8 V LVDS | AN8 | FMC A reference clocks | |
| REFCLK_FMCA_N | 1.8 V LVDS | AN7 | |||
| PCIE_OB_REFCLK_P | 100 | 1.8 V LVDS | AN37 | PCIe® reference clocks | |
| PCIE_OB_REFCLK_N | 1.8 V LVDS | AN38 | |||
| U26 | CLK_EMI_P | 133.33 | 1.8 V LVDS | F34 | EMI reference clocks |
| CLK_EMI_N | 1.8 V LVDS | F35 | |||
| REFCLK_QSFP_P | 644.53125 | 1.8 V LVDS | R37 | QSFP reference clocks | |
| REFCLK_QSFP_N | 1.8 V LVDS | R38 | |||
| REFCLK_SFP_P | 644.53125 | 1.8 V LVDS | AA37 | SFP reference clocks | |
| REFCLK_SFP_N | 1.8 V LVDS | AA38 | |||
| REFCLK_DP_P | 270 | 1.8 V LVDS | AC37 | DisplayPort (DP) reference clocks | |
| REFCLK_DP_N | 1.8 V LVDS | AC38 | |||
| X1 | REFCLK_SDI_P | 148.35 | 1.8 V LVDS | L37 | SDI reference clocks |
| REFCLK_SDI_N | 1.8 V LVDS | L38 | |||
| X2 | CLK_125_P | 125 | 1.8 V LVDS | BD24 | 125 MHz reference clocks for Arria® 10 FPGA |
| CLK_125_N | 1.8 V LVDS | BC24 | |||
| X3 | 100M_OSC_P | 100 | LVDS | AR36, F23, AG37, AC8 | Programmable oscillator, default 100 MHz |
| 100M_OSC_N | LVDS | AR37, G23, AG38, AC7 | |||
| U53 | MV_CLK_50 | 50 | 1.8 V | — | MAX® V System Controller clock |
| CLK_50 | 1.8 V | AU33 | Arria® 10 FPGA reference clock |