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

37.5.6.9. Default Settings for RRS and RIL

The default assignment of RRS and RIL values for each interrupt assumes interrupt port 0 on the VIC instance attached to your processor is the highest priority interrupt, with successively lower priorities as the interrupt port number increases. Interrupt ports on other VIC instances connected through the first VIC's daisy chain interface are assigned successively lower priorities.

To make effective use of the VIC interrupt setting defaults, assign your highest priority interrupts to low interrupt port numbers on the VIC closest to the processor. Assign lower priority interrupts and interrupts that do not need exclusive access to a shadow register set, to higher interrupt port numbers, or to another daisy-chained VIC.

The following steps describe the algorithm for default RIL assignment:

  1. The formula 2RIL width -1 is used to calculate the maximum RIL value.
  2. interrupt port 0 on the VIC connected to the processor is assigned the highest possible RIL.
  3. The RIL value is decremented and assigned to each subsequent interrupt port in succession until the RIL value is 1.
  4. The RILs for all remaining interrupt ports on all remaining VICs in the chain are assigned 1.

    The following steps describe the algorithm for default RRS assignment:

  5. The highest register set number is assigned to the interrupt with the highest priority.
  6. Each subsequent interrupt is assigned using the same method as the default RIL assignment.

    For example, consider a system with two VICs, VIC0 and VIC1. Each VIC has an RIL width of 3, and each has 4 interrupt ports. VIC0 is connected to the processor and VIC1 to the daisy chain interface on VIC0. The processor has 3 shadow register sets.

    Table 400.  Default RRS and RIL Assignment Example
    VIC IRQ RRS RIL
    0 0 3 7
    0 1 2 6
    0 2 1 5
    0 3 1 4
    1 0 1 3
    1 1 1 2
    1 2 1 1
    1 3 1 1