SPRUJC6A December 2024 – July 2025 AM2752-Q1 , AM2754-Q1
The Ring Size Register contains the element count for the ring which is used to hand off pending work for the channel from the Host. A write to this register will reset the associated ring to clear the occupancies and reset the pointers.
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| Instance Name | Physical Address |
|---|---|
| DMASS0_BCDMA_0 | 4860 0048h + formula |
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
| QMODE | RESERVED | RING_ELSIZE | |||||
| R/NA | NONE | R/NA | |||||
| 1h | 0h | 1h | |||||
| 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| RESERVED | |||||||
| NONE | |||||||
| 0h | |||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| SIZE | |||||||
| R/W | |||||||
| 0h | |||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| SIZE | |||||||
| R/W | |||||||
| 0h | |||||||
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 31:29 | QMODE | R/NA | 1h | Defines the mode for this ring or queue. 1 exposed ring mode with dual queues
(forward/reverse) for SW direct access |
| 28:27 | RESERVED | NONE | 0h | Reserved |
| 26:24 | RING_ELSIZE | R/NA | 1h | Reset Source: rst_mod_g_rst_n |
| 23:16 | RESERVED | NONE | 0h | Reserved |
| 15:0 | SIZE | R/W | 0h | Tx Ring element count. This field configures the size of the ring in elements. Reset Source: rst_mod_g_rst_n |