Agilex® 7 FPGA F-Series Transceiver-SoC Development Kit User Guide
A.3. Clocks
| Schematic Signal Name | Default Frequency |
|---|---|
| FPGA_GPIO_REFCLKp/n0 | 156.25M |
| REFCLK_GXEp/n0 | 156.25M |
| SI53311_CLKOUT1p/n | 156.25M |
| REFCLK_GXPp/n0 | 100M |
| REFCLK_GXPp/n2 | 100M |
| PCIE_RC_REFCLKp/n | 100M |
| FPGA_GPIO_REFCLKp/n1 | 125M |
| SODIMM_REFCLKp/n | 100M |
| FPGA_OSC_CLK_1 | 125M |
| FPGA_GPIO_REFCLK | 100M |
| DDR4_COMP_REFCLKp/n | 100M |
| FPGA_SYSTEM_CLK | 100M |
| REFCLK_GXEp/n2 | 153.6M |
| REFCLK_GXEp/n3 | 184.32M |
| Cleaner_SYSTEM_P/N | 184.32M |
| referenceclk_2 | 184.32M |
| referenceclk_3 | 153.6M |
The LMK05028 device is a high-performance clock generator, jitter cleaner, and clock synchronizer with advanced reference clock selection and hitless switching to meet the stringent requirements of communications infrastructure applications. This clock device has two independent PLL cores, each can synchronize or lock to one of four reference clock inputs. It can generate up to eight output clocks with up to six different frequencies.
Two E-Tile transceiver recovery clocks (Cleaner_RECOVERY_p/n [0:1]) feed two of four reference clock inputs, single-end and differential SMA clocks feed other two inputs. LMK05028’s output clocks feed back to E-Tile transceiver bank, general I/O banks, and SMA connectors. You can set LMK05028 to power down mode through SW4.4.
Agilex™ 7 FPGA F-Series manages LMK05028 through general-purpose I/Os (Cleaner_GPIO[0:6], Cleaner_INSEL, Cleaner SCL/SDA, and Cleaner_status[0:1]). The connection between these general-purpose I/Os and FPGA can be shut down by SW10.2.