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

8.2.2. Interface

The Soft UART will have the following signal interface, exposed using _hw.tcl through Platform Designer software.

Table 47.  Clock and Reset Signal Interface
Pin Name Direction Description
clk Input

Avalon® clock sink

rst_n Input

Avalon® reset sink

Asynchronous assert, Synchronous deassert active low reset.

Interconnect fabric expected to perform synchronization – UART and interconnect is expected to be placed in the same reset domain to simplify system design

Table 48.   Avalon® -MM Agent
Pin Name Width Direction Description
addr 9 Input

Avalon® -MM Address bus

Highest addressable byte address is 0x118 so a 9-bit width is required

read   Input Avalon® -MM Read indication
readdata 32 Output Avalon® -MM Read Data Response from the agent
write   Input Avalon® -MM Write indication
writedata 32 Input Avalon® -MM Write Data
Table 49.  Interrupt Interface
Pin Name Direction Description
intr Output Interrupt signal
Table 50.  Flow Control
Pin Name Direction Description
sin Input Serial Input from external link.
sout Output Serial Output to external link.
sout_oe Output Output enable for Serial Output to external link.

sout_oe signal will be high when the UART is transmitting and low when the UART is IDLE.

Table 51.  Modem Control and Status
Pin Name Direction Description
cts_n Input Clear to Send
rts_n Output Request to Send
dsr_n Input Data Set Ready
dcd_n Input Data Carrier Detect
ri_n Input Ring Indicator
dtr_n Output Data Terminal Ready
out1_n Output User Designated Output1
out2_n Output User Designated Output2
Table 52.  DMA Sideband Signals
Pin Name Direction Description
dma_tx_ack_n Input TX DMA acknowledge
dma_rx_ack_n Input RX DMA acknowledge
dma_tx_req_n Output TX DMA request
dma_rx_req_n Output RX DMA request
dma_tx_single_n Output TX DMA single request
dma_rx_single_n Output RX DMA single request