最終更新:2014-04-10 (木) 15:34:11 (3667d)
USBCMD
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USB Command Register
The Command Register indicates the command to be executed by the serial bus host controller. Writing to the register causes a command to be executed.
| Bit | サイズ | メモ |
| 31-24 | 8 | Reserved |
| 23-16 | 8 | Interrupt Threshold Control |
| 15-12 | 4 | Reserved |
| 11 | 1 | Asynchronous Schedule Park Mode Enable |
| 10 | 1 | Reserved |
| 9-8 | 2 | Asynchronous Schedule Park Mode Count |
| 7 | 1 | Light Host Controller Reset |
| 6 | 1 | Interrupt on Async Advance Doorbell |
| 5 | 1 | Asynchronous Schedule Enable |
| 4 | 1 | Periodic Schedule Enable |
| 3-2 | 2 | Frame List Size |
| 1 | 1 | Host Controller Reset (HCRESET) |
| 0 | 1 | Run/Stop(RS) |
