2.5. Interface Signals
Signal Name | Direction | Width (Bits) | Description |
---|---|---|---|
clk_50 | Input | 1 | 50 MHz input clock. |
hssi_refclk | Input | 1 | CDR reference clock for HMC and HMCC IP core. |
hmc_lxrx | Input | Channel Count (16 or 8) | FPGA transceiver receive pins. |
hmc_lxtx | Output | Channel Count (16 or 8) | FPGA transceiver transmit pins. |
hmc_ctrl_lxrxps | Input | 1 | FPGA transceiver power save control. |
hmc_ctrl_lxtxps | Output | 1 | HMC transceiver power save control. |
hmc_ctrl_ferr_n | Input | 1 | HMC FERR_N output. |
hmc_ctrl_p_rst_n | Output | 1 | HMC P_RST_N input. |
hmc_ctrl_scl | Bi-Directional | 1 | HMC I2C configuration clock. |
hmc_ctrl_sda | Bi-Directional | 1 | HMC I2C configuration data. |
fmc0_scl | Output | 1 | Unused. Driven low to protect the FPGA I/O pins from the 3.3 V pullup on the daughter card. |
fmc0_sda | Output | 1 | Unused. Driven low to protect the FPGA I/O pins from the 3.3 V pullup on the daughter card. |
push_button | Input | 1 | Push button input used for reset. |
heart_beat_n | Output | 1 | Heartbeat LED output. |
link_init_complete_n | Output | 1 | Link initialization complete LED output. |
test_passed_n | Output | 1 | Test passed LED output. |
test_failed_n | Output | 1 | Test failed LED output. |