Embedded Peripherals IP User Guide

ID 683130
Date 10/24/2025
Public
Document Table of Contents
1. Introduction 2. Avalon® -ST Serial Peripheral Interface Core 3. SPI Core 4. SPI Agent/JTAG to Avalon® Host Bridge Cores 5. Intel eSPI Agent Core 6. eSPI to LPC Bridge Core 7. Ethernet MDIO Core 8. Intel FPGA 16550 Compatible UART Core 9. UART Core 10. Lightweight UART Core 11. JTAG UART Core 12. Intel FPGA Avalon® Mailbox Core 13. Intel FPGA Avalon® Mutex Core 14. Intel FPGA Avalon® I2C (Host) Core 15. Intel FPGA I2C Agent to Avalon® -MM Host Bridge Core 16. EPCS/EPCQA Serial Flash Controller Core 17. Intel FPGA Serial Flash Controller Core 18. Intel FPGA Serial Flash Controller II Core 19. Intel FPGA Generic QUAD SPI Controller Core 20. Intel FPGA Generic QUAD SPI Controller II Core 21. Interval Timer Core 22. Intel FPGA Avalon FIFO Memory Core 23. On-Chip Memory (RAM and ROM) Intel FPGA IP 24. On-Chip Memory II (RAM or ROM) Intel FPGA IP 25. PIO Core 26. PLL Cores 27. DMA Controller Core 28. Modular Scatter-Gather DMA Core 29. Scatter-Gather DMA Controller Core 30. Video Sync Generator and Pixel Converter Cores 31. Intel FPGA Interrupt Latency Counter Core 32. Performance Counter Unit Core 33. Vectored Interrupt Controller Core 34. System ID Peripheral Core 35. Intel FPGA GMII to RGMII Converter Core 36. HPS GMII to RGMII Adapter IP 37. Intel FPGA MII to RMII Converter Core 38. HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core IP 39. Intel FPGA HPS EMAC to Multi-rate PHY GMII Adapter Core 40. Intel FPGA MSI to GIC Generator Core 41. Cache Coherency Translator IP 42. Altera ACE5-Lite Cache Coherency Translator

37.2. Interface Signals

Figure 158. Interface Signals
Signal Name Type Width (bit) Description
Clock and Reset
RefClk Input 1 A fixed frequency interface clock of 50 MHz. It is driven by PHY.
Rstn Input 1 Active low reset signal. EMAC provides this signal and it is connected to the MII to RMII Converter core and the PHY.
RMII: Core to RMII PHY Transmit Interface
rmii_tx_d[1:0] Output 2 Transmit data.
rmii_tx_en Output 1 Transmit enable.
RMII: PHY to RMII Receive Interface
rmii_crs_dv Input 1 Multiplexed Carrier Sense or Data Valid Signal (RMII 1.2).
rmii_rx_d[1:0] Input 2 Receive data.
rmii_rx_err Input 1 Receive error.
MII: RMII Core to MAC Transmit Interface
tx_clk Output 1
Transmit clock:
  • 25 MHz in 100 Mbps speed mode
  • 2.5 MHz in 10 Mbps speed mode
m_tx_en Input 1 Transmit data valid synchronized signal to transmit clock.
m_tx_d[3:0] Input 4 Transmit data.
m_tx_err Input 1 Transmit error.
MII: MAC to RMII Core Receive Interface
rx_clk Output 1 Receive clock.
m_rx_en Output 1 Receive data valid (extracted from CRS_DV).
m_rx_err Output 1 Receive error.
m_rx_crs Output 1 Ethernet carrier sense signal.
m_rx_col Output 1 Ethernet collision signal.
m_rx_d[3:0] Output 4 Receive data.
Core Speed Selection
ena_10 Input 1 Indication that the MAC is configured to 10 Mbps throughput.