Embedded Peripherals IP User Guide

ID 683130
Date 8/11/2025
Public
Document Table of Contents
1. Introduction 2. Avalon® -ST Single-Clock and Dual-Clock FIFO Cores 3. Avalon® -ST Serial Peripheral Interface Core 4. SPI Core 5. SPI Agent/JTAG to Avalon® Host Bridge Cores 6. Intel eSPI Agent Core 7. eSPI to LPC Bridge Core 8. Ethernet MDIO Core 9. Intel FPGA 16550 Compatible UART Core 10. 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. Intel FPGA Avalon® Compact Flash Core 17. EPCS/EPCQA Serial Flash Controller Core 18. Intel FPGA Serial Flash Controller Core 19. Intel FPGA Serial Flash Controller II Core 20. Intel FPGA Generic QUAD SPI Controller Core 21. Intel FPGA Generic QUAD SPI Controller II Core 22. Interval Timer Core 23. Intel FPGA Avalon FIFO Memory Core 24. On-Chip Memory (RAM and ROM) Intel FPGA IP 25. On-Chip Memory II (RAM or ROM) Intel FPGA IP 26. Optrex 16207 LCD Controller Core 27. PIO Core 28. PLL Cores 29. DMA Controller Core 30. Modular Scatter-Gather DMA Core 31. Scatter-Gather DMA Controller Core 32. SDRAM Controller Core 33. Tri-State SDRAM Core 34. Video Sync Generator and Pixel Converter Cores 35. Intel FPGA Interrupt Latency Counter Core 36. Performance Counter Unit Core 37. Vectored Interrupt Controller Core 38. Avalon® -ST Data Pattern Generator and Checker Cores 39. Avalon® -ST Test Pattern Generator and Checker Cores 40. System ID Peripheral Core 41. Avalon® Packets to Transactions Converter Core 42. Avalon® -ST Multiplexer and Demultiplexer Cores 43. Avalon® -ST Bytes to Packets and Packets to Bytes Converter IP 44. Avalon® -ST Delay Core 45. Avalon® -ST Round Robin Scheduler Core 46. Avalon® -ST Splitter Core 47. Avalon® -MM DDR Memory Half Rate Bridge Core 48. Intel FPGA GMII to RGMII Converter Core 49. HPS GMII to RGMII Adapter Intel® FPGA IP 50. Intel FPGA MII to RMII Converter Core 51. HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core Intel® FPGA IP 52. Intel FPGA HPS EMAC to Multi-rate PHY GMII Adapter Core 53. Intel FPGA MSI to GIC Generator Core 54. Cache Coherency Translator Intel® FPGA IP 55. Altera ACE5-Lite Cache Coherency Translator 56. Lightweight UART Core

23.2.4. Avalon® -ST Sink to Avalon® -MM Read Agent

In this configuration seen in the figure below, the input is an Avalon® -ST sink and the output is an Avalon® -MM read agent with a width of 32 bits. The Avalon® -ST input (sink) data width must also be 32 bits. You can configure input interface parameters, including: bits per symbol, symbols per beat, and the width of the channel and error signals. The FIFO core performs the endian conversion to conform to the output interface protocol.

An Avalon® -MM host reads the data from the FIFO core. The signals are mapped into bits in the Avalon® address space. If Allow backpressure is turned on, the input (sink) interface uses the ready and valid signals to indicate when space is available in the FIFO core and when valid data is available. For the output interface, waitrequest is asserted for read operations when there is no data to be read from the FIFO core. It is deasserted when the FIFO core has data to send. The memory map for this configuration is exactly the same as for the Avalon® -MM to Avalon® -ST FIFO core. See the for Memory Map table for more information.

Figure 75. FIFO with Avalon® -ST Input and Avalon® -MM Output

If Enable packet data is turned off, read data repeatedly at address offset 0 to pop the data from the FIFO core.

If Enable packet data is turned on, the Avalon® -MM read host starts reading from address offset 0. If the read is valid, that is, the FIFO core is not empty, both data and packet status information are popped from the FIFO core. The packet status information is obtained by reading at address offset 1. Reading from address offset 1 does not pop data from the FIFO core. The ERROR, CHANNEL, SOP, EOP and EMPTY fields are available at address offset 1 to determine the status of the packet data read from address offset 0.

The EMPTY field indicates the number of empty symbols in the data field. For example, if the Avalon® -ST interface has symbols-per-beat of 4, and the last packet data only has 1 symbol, the empty field is 3 to indicate that 3 symbols (the 3 least significant symbols in the memory map) are empty.