SPRUJC6A December 2024 – July 2025 AM2752-Q1 , AM2754-Q1
Structural Parameters 2 Register For register definitions, refer to the xHCI specification.
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| Instance Name | Physical Address |
|---|---|
| USB0 | 3100 0008h |
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
| MAXSCRATCHPADBUFS | SPR | MAXSCRATCHPADBUFS_HI | |||||
| R | R | R | |||||
| 2h | 1h | 0h | |||||
| 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| MAXSCRATCHPADBUFS_HI | RESERVED_20_8 | ||||||
| R | R | ||||||
| 0h | 0h | ||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RESERVED_20_8 | |||||||
| R | |||||||
| 0h | |||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| ERSTMAX | IST | ||||||
| R | R | ||||||
| Fh | 1h | ||||||
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 31:27 | MAXSCRATCHPADBUFS | R | 2h | Max Scratchpad Bufs Lo The value is calculated based on chosen configuration parameter values. Possible values are 1-4. Reset Source: rst_mod_g_rst_n |
| 26 | SPR | R | 1h | Scratchpad Restore [SPR] Reset Source: rst_mod_g_rst_n |
| 25:21 | MAXSCRATCHPADBUFS_HI | R | 0h | Max Scratchpad Bufs HI The controller automatically updates this field. Reset Source: rst_mod_g_rst_n |
| 20:8 | RESERVED_20_8 | R | 0h | Reserved |
| 7:4 | ERSTMAX | R | Fh | Event Ring Segment Table Max [ERST Max] Reset Source: rst_mod_g_rst_n |
| 3:0 | IST | R | 1h | Isochronous Scheduling Threshold [IST] Reset Source: rst_mod_g_rst_n |