SPRUJC6A December 2024 – July 2025 AM2752-Q1 , AM2754-Q1
The isochronous buffering scheme allows each ping or pong buffer to contain a single block or a multiple number of blocks. For this reason, the isochronous buffer depth (BDi) must be defined in terms of an integer number (n) and block size (BS) (that is, BDi = n × (BS + 1) - 1).
Table 12-58 shows the format for an isochronous DMA descriptor table entry. For more details about the field descriptions see Table 12-56. Each isochronous channel buffer can be up to 8k-bytes deep.
| Bit Offset | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | CE | LE | PG | Reserved | ||||||||||||
| 16 | Reserved | |||||||||||||||
| 32 | RDY1 | DNE1 | ERR1 | BD1[12-0] | ||||||||||||
| 48 | RDY2 | DNE2 | ERR2 | BD2[12-0] | ||||||||||||
| 64 | BA1[15-0] | |||||||||||||||
| 80 | BA1[31-16] | |||||||||||||||
| 96 | BA2[15-0] | |||||||||||||||
| 112 | BA2[31-16] | |||||||||||||||