Embedded Peripherals IP User Guide

ID 683130
Date 10/18/2021
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) Core 26. On-Chip Memory II (RAM or ROM) 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

31.5.1. Status Register

Table 292.  Status Register Bit Definition
Bit Name Description
31:10 <reserved> N/A
9 IRQ Set when interrupt condition occurs.

This bit is set by hardware and cleared by software. To clear this bit, software needs to write a 1 to this bit. This bit is set when a hardware event has a higher priority than a clear by a software event.

8 Stopped on Early Termination When the dispatcher is programmed to stop on early termination, this bit is set. Also set, when the write host is performing a packet transfer and does not receive EOP before the pre-determined amount of bytes are transferred, which is set in the descriptor length field. If you do not wish to use early termination you should set the transfer length of the descriptor to 0xFFFFFFFF ,which gives you the maximum packet based transfer possible (early termination is always enabled for packet transfers).
7 Stopped on Error When the dispatcher is programmed to stop errors and when an error beat enters the write host the bit is set.
6 Resetting Set when you write to the software reset register and the SGDMA is in the middle of a reset cycle. This reset cycle is necessary to make sure there are no incoming transfers on the fabric. When this bit de-asserts you may start using the SGDMA again.
5 Stopped Set when you either manually stop the SGDMA, or you setup the dispatcher to stop on errors or early termination and one of those conditions occurred. If you manually stop the SGDMA this bit is asserted after the host completes any read or write operations that were already in progress.
4 Response Buffer Full Set when the response buffer is full.
3 Response Buffer Empty Set when the response buffer is empty.
2 Descriptor Buffer Full Set when either the read or write command buffers are full.
1 Descriptor Buffer Empty Set when both the read and write command buffers are empty.
0 Busy Set when
  • the dispatcher still has commands buffered
  • one of the hosts is still transferring data
  • the write host is waiting for write responses to return if wait for write response is enabled in the descriptor and write responses are still returning.