Visible to Intel only — GUID: qxb1679330706236
Ixiasoft
Visible to Intel only — GUID: qxb1679330706236
Ixiasoft
5.6.5.3. Application interface Unit
The application interface unit (AIU) generates DMA requests based on programmable FIFO buffer thresholds. The AIU generates interrupts to the GIC for both host and device modes. A DMA scheduler is included in the AIU to arbitrate and control the data transfer between packets in system memory and their respective USB endpoints. The application layer (APP) is common for USB 2.0 and USB 3.1 operation. This has the bus interface, buffer management block, list processor for scheduling, and control and status register (CSR) functions.