9.3.9.2 ULPI_CARKIT_CTRL_REG Bit Definitions
| Bit Number | Name | Reset Value | Function |
|---|---|---|---|
| [7:6] | Reserved | NA | Reserved |
| 5 | CarKitActiveEnd | 0 | Set by link when CarKitActive (bit 1 of this register) is cleared. This bit must be cleared by software. It signifies that the USB controller’s (synchronous) USB mode has been entered. |
| 4 | RxCmdEvent | 0 | Set by link when a RxCmd has been latched. This bit must be cleared by software. |
| 3 | CancelCarKit | 0 | Set by software to abort CarKit mode and wake up the PHY. This bit auto-clears when the PHY enters Synchronous mode. |
| 2 | AltIntEvent | 0 | Set by link when an alt_int (ULPI_RAW_DATA_REG.bit7) event occurs. This bit must be cleared by software. |
| 1 | CarKitActive | 0 | Set by link when the (asynchronous) CarKit mode is entered after DIR goes high. It is cleared on the falling edge of DIR. |
| 0 | DisableUTMI | 0 | Set and cleared by software to decouple the
reconstituted UTMI signals from the USB controller prior to entering CarKit
mode. It cannot be cleared while ULPICarKitControl CarKitActive bit (bit 1 of this register) is set. |