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

15.2.2. N-byte Addressing

This IP supports up to a 4 bytes addressing mode. You can select which byte addressing mode you want to use in Platform Designer.

The Avalon® Address width present at the Avalon® host interface is fixed at 32 bits. If you select other than a 4 bytes addressing mode, zeros are added to the most significant bit(s) (MSB) of the Avalon® Address width. For example in 2 bytes addressing mode, only the lower 16 bits of the address width are used while the upper 16 bits are zero.

  • When byte addressing mode = 1, address width in use = 8 + address stealing bit

  • When byte addressing mode = 2, address width in use = 16 + address stealing bit

  • When byte addressing mode = 3, address width in use = 24 + address stealing bit

  • When byte addressing mode = 4, address width in use = 32

There is an address counter inside the I2C to Avalon® host interface translator block. The counter rolls over at the maximum upper address bound according to the byte addressing mode plus one address stealing bit. It does not continue incrementing up the full address range of the Avalon® address size. For example, the address counter rolls over at 128 K memory size in 2 bytes addressing mode plus one address stealing bit.