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

5.2. Functional Description

Figure 13. System with an SPI Agent to Avalon® Host Bridge Core
Figure 14. System with a JTAG to Avalon® Host Bridge Core
Note: System clock must be at least 2X faster than the JTAG clock.

The SPI Agent to Avalon® Host Bridge and the JTAG to Avalon® Host Bridge cores accept encoded streams of bytes with transaction data on their respective physical interfaces and initiate Avalon® memory-mapped interface transactions on their Avalon® memory-mapped interfaces. Each bridge consists of the following cores, which are available as standalone components in Platform Designer (except the JTAG to Avalon® Streaming Interface Block):

  • Avalon® Streaming Interface Serial Peripheral Interface—Accepts incoming data in bits and packs them into bytes.
  • JTAG to Avalon® Streaming Interface Block—Custom block that accepts incoming data in bits and packs them into bytes.
  • Avalon® Streaming Interface Bytes to Packets Converter—Transforms packets into encoded stream of bytes, and a likewise encoded stream of bytes into packets.
  • Avalon® Streaming Interface Packets to Transactions Converter—Transforms packets with data encoded according to a specific protocol into Avalon® memory-mapped interface transactions, and encodes the responses into packets using the same protocol.
  • Avalon® Streaming Interface Single Clock FIFO—Buffers data from the Avalon® Streaming Interface JTAG Interface core. The FIFO is only used in the JTAG to Avalon® Host Bridge.

    For the bridges to successfully transform the incoming streams of bytes to Avalon® memory-mapped interface transactions, the streams of bytes must be constructed according to the protocols used by the cores.

Note: When you connect the JTAG Avalon® Host Bridge component to an agent that back-pressures the host interface on this component, then using the System Console master_write_from_file command may result in data loss at the host interface or hung command in System Console.
Figure 15. Bits to Avalon® memory-mapped interface Transaction (Write)The following example shows how a bytestream changes as it is transferred through the different layers in the bridges for write transaction.
Figure 16. Write ResponseAfter sending a write transaction packet through MOSI bus, the host has to initiate 8 bytes of IDLE transaction on the MOSI bus in order to get the write response from the MISO bus. The following figure shows the write response transaction that constructed by the bridge in the MISO bus. The most significant bit of the command is inversed.
Figure 17. Bits to Avalon® memory-mapped interface Transaction (Read)The following figure shows how a bytestream changes as it is transferred through the different layers in the bridges for a read transaction.
Figure 18. Read ResponseAfter sending a read transaction through MOSI bus, the host has to initiate IDLE transaction on the MOSI bus to get the read response from the MISO bus. There is a possibility that the Avalon agent device is yet to return the read data, therefore the bridge returns 0x4A until read data is received. When read data is received by the bridge, it sends channel byte as the first byte followed by the SOP and data byte. The following figure shows the read response transaction that constructed by the bridge in the MISO bus.