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

5.1.3.1. Peripheral Channel

The peripheral channel allows you to communicate between the eSPI host and the eSPI endpoints located at the agent side (example: PORT80). To reset the channel, use the platform reset (PLTRST_n VW).

You can enable the peripheral I/O access and configure the port width and direction using the Platform Designer. The eSPI agent core allocates address range from 00h to A0h to access the peripheral I/O. See Table: Peripheral I/O Port Configuration for more details. By default, the pc_port80 has an 8-bit data width. Each address location can be configured as 8-bit wide, 16-bit wide or 32-bit wide.

Setting an I/O port to 8-bit wide requires that you access the port using PUT_IORD_SHORT 1 byte/PUT_IOWR_SHORT 1 byte command. Setting an I/O port to 16-bit wide requires that you access the port using PUT_IORD_SHORT 2 byte/PUT_IOWR_SHORT 2 byte command. Setting an I/O port to 32-bit wide requires that you access the port using PUT_IORD_SHORT 4 byte/PUT_IOWR_SHORT 4 byte command.

PUT_PC or PUT_NP loads packets into the FIFO while GET_PC or GET_NP flushes out packets from the FIFO. Decoder decodes address bytes from the header and sends data out to the corresponding output port.
Table 13.  Peripheral I/O Port Configuration
Address Data Width Port Name Port Direction Enable
00h 8/16/32 pc_port00 Input/Output Yes/No
10h 8/16/32 pc_port10 Input/Output Yes/No
20h 8/16/32 pc_port20 Input/Output Yes/No
30h 8/16/32 pc_port30 Input/Output Yes/No
40h 8/16/32 pc_port40 Input/Output Yes/No
50h 8/16/32 pc_port50 Input/Output Yes/No
60h 8/16/32 pc_port60 Input/Output Yes/No
70h 8/16/32 pc_port70 Input/Output Yes/No
80h 8/16/32 pc_port80 Input/Output Yes/No
90h 8/16/32 pc_port90 Input/Output Yes/No
A0h 8/16/32 pc_portA0 Input/Output Yes/No