SPRUJC6A December 2024 – July 2025 AM2752-Q1 , AM2754-Q1
The RNUMEVT and RNUMDMA values must be set prior to enabling the Read FIFO. If the Read 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 1008h |
| MCASP1 | 02B1 1008h |
| MCASP2 | 02B2 1008h |
| MCASP3 | 02B3 1008h |
| MCASP4 | 02B4 1008h |
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
| RESERVED129 | |||||||
| R | |||||||
| 0h | |||||||
| 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| RESERVED129 | RENA | ||||||
| R | R/W | ||||||
| 0h | 0h | ||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RNUMEVT | |||||||
| R/W | |||||||
| 10h | |||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RNUMDMA | |||||||
| R/W | |||||||
| 4h | |||||||
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 31:17 | RESERVED129 | R | 0h | |
| 16 | RENA | R/W | 0h | Read FIFO enable bit. 0 Read FIFO is disabled. The RLVL bit in the
Read FIFO status register (RFIFOSTS) is
reset to 0 and pointers are initialized,
that is, the Read FIFO is flushed.
1 Read FIFO is enabled. If Read FIFO is to be
enabled, it must be enabled prior to taking
McASP out of reset. |
| 15:8 | RNUMEVT | R/W | 10h | Read word count per DMA event [32 bit]. When the Read FIFO contains at least RNUMEVT words of data, then an AREVT [receive 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 receivers. This value must be set prior to enabling the Read FIFO. 416h = 3 to 64 words from 3h to 416h. FFh = Reserved from 41h = 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 | RNUMDMA | R/W | 4h | Read word count per transfer [32 bit words]. Upon a receive DMA event from the McASP, the Read FIFO reads RNUMDMA words from the McASP. This value must equal the number of McASP serializers used as receivers. This value must be set prior to enabling the Read FIFO. 10h = 3 to 16 words from 3h to 10h. FFh = Reserved from 11h to FFh. 0 0 words 1 1 word 2 2 words 3 3 to 16 words from 3h to 10h. 17 Reserved from 11h to FFh. |