Visible to Intel only — GUID: iga1406293764914
Ixiasoft
Visible to Intel only — GUID: iga1406293764914
Ixiasoft
18.2.1. Avalon® -MM Agent Interface and Registers
The EPCS/EPCQA serial flash controller core has a single Avalon® -MM agent interface that provides access to both boot-loader code and registers that control the core. As shown in below, the first segment is dedicated to the boot-loader code, and the next seven words are control and data registers. A Nios® II CPU can read the instruction words, starting from the core's base address as flat memory space, which enables the CPU to reset the core's address space.
The EPCS/EPCQA serial flash controller core includes an interrupt signal that can be used to interrupt the CPU when a transfer has completed.
Offset (32-bit Word Address) |
Register Name | R/W | Bit Description |
---|---|---|---|
31:0 | |||
0x00 .. 0xFF | Boot ROM Memory | R | Boot Loader Code |
0x100 | Read Data | R | |
0x101 | Write Data | W | |
0x102 | Status | R/W | |
0x103 | Control | R/W | |
0x104 | Reserved | — | |
0x105 | Slave Enable | R/W | |
0x106 | End of Packet | R/W |