DB25 (USB_XHCI) Register Description
| Register Name | DB25 |
|---|
| Relative Address | 0x0000000544 |
|---|
| Absolute Address |
0x00FE200544 (USB2_XHCI)
|
|---|
| Width | 32 |
|---|
| Type | mixedMixed types. See bit-field details. |
|---|
| Reset Value | 0x00000000 |
|---|
| Description | Doorbell Target and Stream ID |
|---|
Note: Programming this field with random data will cause side effect i.e. Register Access will fail (Timeout) if the pipe clock is not running or reset is asserted. Note: Bit Bash register testing is not recommended. For a description of this standard USB register, see the eXtensible Host Controller Interface for Universal Serial Bus (USB) Specification
DB25 (USB_XHCI) Register Bit-Field Summary
| Field Name | Bits | Type | Reset Value | Description |
|---|
| DB_STREAM_ID | 31:16 | rwNormal read/write | 0 | Doorbell stream ID |
| Reserved | 15:8 | roRead-only | 0x0 | Reserved |
| DB_TARGET | 7:0 | rwNormal read/write | 0 | Doorbell Target |