Embedded Peripherals IP User Guide

ID 683130
Date 2/09/2023
Public

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Document Table of Contents
1. Introduction 2. Avalon® -ST Multi-Channel Shared Memory FIFO Core 3. Avalon® -ST Single-Clock and Dual-Clock FIFO Cores 4. Avalon® -ST Serial Peripheral Interface Core 5. SPI Core 6. SPI Agent/JTAG to Avalon® Host Bridge Cores 7. Intel eSPI Agent Core 8. eSPI to LPC Bridge Core 9. Ethernet MDIO Core 10. Intel FPGA 16550 Compatible UART Core 11. UART Core 12. JTAG UART Core 13. Intel FPGA Avalon® Mailbox Core 14. Intel FPGA Avalon® Mutex Core 15. Intel FPGA Avalon® I2C (Host) Core 16. Intel FPGA I2C Agent to Avalon® -MM Host Bridge Core 17. Intel FPGA Avalon® Compact Flash Core 18. EPCS/EPCQA Serial Flash Controller Core 19. Intel FPGA Serial Flash Controller Core 20. Intel FPGA Serial Flash Controller II Core 21. Intel FPGA Generic QUAD SPI Controller Core 22. Intel FPGA Generic QUAD SPI Controller II Core 23. Interval Timer Core 24. Intel FPGA Avalon FIFO Memory Core 25. On-Chip Memory (RAM and ROM) Intel FPGA IP 26. On-Chip Memory II (RAM or ROM) Intel FPGA IP 27. Optrex 16207 LCD Controller Core 28. PIO Core 29. PLL Cores 30. DMA Controller Core 31. Modular Scatter-Gather DMA Core 32. Scatter-Gather DMA Controller Core 33. SDRAM Controller Core 34. Tri-State SDRAM Core 35. Video Sync Generator and Pixel Converter Cores 36. Intel FPGA Interrupt Latency Counter Core 37. Performance Counter Unit Core 38. Vectored Interrupt Controller Core 39. Avalon® -ST Data Pattern Generator and Checker Cores 40. Avalon® -ST Test Pattern Generator and Checker Cores 41. System ID Peripheral Core 42. Avalon® Packets to Transactions Converter Core 43. Avalon® -ST Multiplexer and Demultiplexer Cores 44. Avalon® -ST Bytes to Packets and Packets to Bytes Converter Cores 45. Avalon® -ST Delay Core 46. Avalon® -ST Round Robin Scheduler Core 47. Avalon® -ST Splitter Core 48. Avalon® -MM DDR Memory Half Rate Bridge Core 49. Intel FPGA GMII to RGMII Converter Core 50. Intel FPGA MII to RMII Converter Core 51. Intel FPGA HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core 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. Lightweight UART Core

11.4.3. Register Map

Programmers using the HAL API never access the UART core directly via its registers. In general, the register map is only useful to programmers writing a device driver for the core.

The Intel-provided HAL device driver accesses the device registers directly. If you are writing a device driver and the HAL driver is active for the same device, your driver will conflict and fail to operate.

The UART Core Register map table below shows the register map for the UART core. Device drivers control and communicate with the core through the memory-mapped registers.

Table 96.  UART Core Register Map
Offset Register Name R/W Description/Register Bits
15:13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 rxdata RO Reserved 16 16 Receive Data
1 txdata WO Reserved 16 16 Transmit Data
2 status 15 RW Reserved eop cts dcts   e rrdy trdy tmt toe roe brk fe pe
3 control RW Reserved ieop rts idcts trbk ie irrdy itrdy itmt itoe iroe ibrk ife ipe
4 divisor 17 RW Baud Rate Divisor
5 endof-packet 17 RW Reserved 16 16 End-of-Packet Value

Some registers and bits are optional. These registers and bits exists in hardware only if it was enabled at system generation time. Optional registers and bits are noted in the following sections.

15 Writing zero to the status register clears the dcts, e, toe, roe, brk, fe, and pe bits.
16 These bits may or may not exist, depending on the Data Width hardware option. If they do not exist, they read zero, and writing has no effect.
17 This register may or may not exist, depending on hardware configuration options. If it does not exist, reading returns an undefined value and writing has no effect.