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

28.14.7.1.1. Status Register (Offset 0x0)

Table 435.  Status Register Bit Definition
Bit Name SW Access HW Access Default Value Description
31:10 <reserved> R N/A 0 Reserved.
9 IRQ R/W1C R/W 0

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.

Note: This bit is cleared when Reset Dispatcher is set by software.
8 Stopped on Early Termination R R/W 0

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).

Note: This bit is cleared when Reset Dispatcher is set by software.
7 Stopped on Error R R/W 0

When the dispatcher is programmed to stop on errors and when an error beat enters the write host the bit is set.

Note: This bit is cleared when Reset Dispatcher is set by software.
6 Resetting R R/W 0

Set when you write to the software reset register and the mSGDMA 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 mSGDMA again.

5 Stopped R R/W 0

Set when you either manually stop the mSGDMA, or you setup the dispatcher to stop on errors or early termination and one of those conditions occurred. If you manually stop the mSGDMA, this bit is asserted after the host completes any read or write operations that were already in progress.

4 ResponseBuffer Full R R/W 0 Set when the response buffer is full.
Note: Applicable only when Response Port parameter is enabled and configured to either Memory-Mapped or Streaming interface.
3 ResponseBuffer Empty R R/W 1 Set when the response buffer is empty.
Note: Applicable only when Response Port parameter is enabled and configured to either Memory-Mapped or Streaming interface.
2 Descriptor Buffer Full R R/W 0 Set when either the read or write command buffers are full.
1 DescriptorBuffer Empty R R/W 1 Set when both the read and write command buffers are empty.
0 Busy R R/W 0
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.