SPRUJC6A December 2024 – July 2025 AM2752-Q1 , AM2754-Q1
The WNUMEVT and WNUMDMA values must be set prior to enabling the Write FIFO. If the Write FIFO is to be enabled, it must be enabled prior to taking the McASP out of reset
Return to Summary Table
| Instance Name | Physical Address |
|---|---|
| MCASP0 | 02B0 1000h |
| MCASP1 | 02B1 1000h |
| MCASP2 | 02B2 1000h |
| MCASP3 | 02B3 1000h |
| MCASP4 | 02B4 1000h |
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
| RESERVED127 | |||||||
| R | |||||||
| 0h | |||||||
| 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| RESERVED127 | WENA | ||||||
| R | R/W | ||||||
| 0h | 0h | ||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| WNUMEVT | |||||||
| R/W | |||||||
| 10h | |||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| WNUMDMA | |||||||
| R/W | |||||||
| 4h | |||||||
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 31:17 | RESERVED127 | R | 0h | |
| 16 | WENA | R/W | 0h | Write FIFO enable bit. 0 Write FIFO is disabled. The WLVL bit in the
Write FIFO status register (WFIFOSTS) is
reset to 0 and pointers are initialized,
that is, the Write FIFO is flushed.
1 Write FIFO is enabled. If Write FIFO is to
be enabled, it must be enabled prior to
taking McASP out of reset. |
| 15:8 | WNUMEVT | R/W | 10h | Write word count per DMA event [32 bit]. When the Write FIFO has space for at least WNUMEVT words of data, then an AXEVT [transmit DMA event] is generated to the host/DMA controller. This value should be set to a non-zero integer multiple of the number of serializers enabled as transmitters. This value must be set prior to enabling the Write FIFO. 416h = 3 to 64 words from 3h to 416h. FFh = Reserved from 41h to FFh. 0 0 words 1 1 word 2 2 words 3 3 to 64 words from 3h to 40h. 65 Reserved from 41h to FFh. |
| 7:0 | WNUMDMA | R/W | 4h | Write word count per transfer [32 bit words]. Upon a transmit DMA event from the McASP, WNUMDMA words are transferred from the Write FIFO to the McASP. This value must equal the number of McASP serializers used as transmitters. This value must be set prior to enabling the Write FIFO. FFh = Reserved from 11h to FFh. 0 0 words 1 1 word 2 2 words 3 3-16 words from 3h to 10h. 17 Reserved from 11h to FFh. |