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

16.2.1. Avalon® -MM Agent Interface and Registers

The EPCS/EPCQA serial flash controller core has a single Avalon® -MM agent interface that provides access to both boot-loader code and registers that control the core. As shown in below, the first segment is dedicated to the boot-loader code, and the next seven words are control and data registers. A Nios® II CPU can read the instruction words, starting from the core's base address as flat memory space, which enables the CPU to reset the core's address space.

The EPCS/EPCQA serial flash controller core includes an interrupt signal that can be used to interrupt the CPU when a transfer has completed.

Table 166.  EPCS/EPCQA Serial Flash Controller Core Register Map
Offset

(32-bit Word Address)

Register Name R/W Bit Description
31:0
0x00 .. 0xFF Boot ROM Memory R Boot Loader Code
0x100 Read Data R  
0x101 Write Data W
0x102 Status R/W
0x103 Control R/W
0x104 Reserved
0x105 Slave Enable R/W
0x106 End of Packet R/W
Note: Intel does not publish the usage of the control and data registers. To access the EPCS/EPCQA device, you must use the HAL drivers provided by Intel.