Intel® Core™ Ultra 200V Series Processors SOC I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 831520 | 09/03/2024 | 001 | Public |
Output Stream Descriptor x Control (OSD0CTL_B0) – Offset 1e0
This register provides the control of the output stream DMA.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 7:6 | 0h | RO | Reserved (Preserved) (RSVD7) SW must preserve the original value when writing. |
| 5 | 0h | RO | FIFO Limit Change (FIFOLC) Writing a 1 to this bit indicates a new update to the FIFOL register has been made. After the HW has completed sequencing into the new effective FIFO size, it will clear this bit. |
| 4 | 0h | RW | Descriptor Error Interrupt Enable (DEIE) Controls whether an interrupt is generated when the Descriptor Error Status (DESE) bit is set. |
| 3 | 0h | RW | FIFO Error Interrupt Enable (FEIE) This bit controls whether the occurrence of a FIFO error (overrun for input, under-run for output) will cause an interrupt or not. If this bit is not set, bit 3 in the Status register will be set, but the interrupt will not occur. Either way, the samples will be dropped. |
| 2 | 0h | RW | Interrupt On Completion Enable (IOCE) This bit controls whether or not an interrupt occurs when a buffer completes with the IOC bit set in its descriptor. If this bit is not set, bit 2 in the Status register will be set, but the interrupt will not occur. |
| 1 | 0h | RW/V | Stream Run (RUN) When set to 1 the DMA engine associated with this stream will be enabled to transfer data between FIFO and main memory. The SSYNC bit must also be cleared in order for the DMA engine to run. For output streams, the cadence generator is reset whenever the RUN bit is set. |
| 0 | 0h | RW/V | Stream Reset (SRST) Writing a 1 causes the corresponding stream to be reset. The Stream Descriptor registers (except the SRST bit itself) and FIFO's for the corresponding stream are reset. |