Visible to Intel only — GUID: zzb1495003040344
Ixiasoft
1.3.1.1.2. Nios® II Subsystem in Platform Designer
The Nios® II subsystem Platform Designer project, nios_subsystem.qsys, instantiates the following peripherals:
- Nios® II processor
- On-chip memory (altera_avalon_onchip_memory2)—provides both instruction and data memory space
- Timer—provides a general timer function for the software
- JTAG UART—serves as the main communications portal between the user and the Nios® II processor via the terminal console in Nios® II SBT for Eclipse tool
- Avalon® -MM bridges—two Avalon® -MM bridge modules; one to interface to the JESD204B subsystem and the other interface to the Platform Designer components (core PLL reconfiguration controller and SPI master module)
- PIO—provides general input/output (I/O) access from the Nios® II processor to the HDL components in the FPGA via two sets of 32-bit registers:
- io_status—status registers input from the HDL components to the Nios® II processor
- io_control—control registers output from the Nios® II processor to the HDL components
Bit | Signal |
---|---|
0 | Core PLL locked |
1 | TX transceiver ready (Link 0/Instance 0) |
2 | RX transceiver ready (Link 0/Instance 0) |
3 | Test pattern checker data error (Link 0/Instance 0) |
4–31 | TX transceiver ready, RX transceiver ready, and test pattern checker data error signals for subsequent JESD204B IP cores (Link 1-9/ Instance 1-9), if present. |
Bit | Signal |
---|---|
0 | RX serial loopback enable for two JESD204B IP cores in this design |
1 | Reserved |
2 | Reserved |
3 | Reserved |
4–30 | Reserved |
31 | Sysref |
You can access the address map of the submodules in the Nios® II subsystem by clicking on the Address Map tab in the Platform Designer window.