USBADRA=INSTANTANEOUS
USB device address (device mode)
| RESERVED | Reserved |
| USBADRA | Device address advance 0 (INSTANTANEOUS): Any write to USBADR are instantaneous. 1 (DELAYED): When the user writes a one to this bit at the same time or before USBADR is written, the write to USBADR fields is staged and held in a hidden register. After an IN occurs on endpoint 0 and is acknowledged, USBADR will be loaded from the holding register. Hardware will automatically clear this bit on the following conditions: IN is ACKed to endpoint 0. USBADR is updated from the staging register. OUT/SETUP occurs on endpoint 0. USBADR is not updated. Device reset occurs. USBADR is set to 0. After the status phase of the SET_ADDRESS descriptor, the DCD has 2 ms to program the USBADR field. This mechanism will ensure this specification is met when the DCD can not write the device address within 2 ms from the SET_ADDRESS status phase. If the DCD writes the USBADR with USBADRA=1 after the SET_ADDRESS data phase (before the prime of the status phase), the USBADR will be programmed instantly at the correct time and meet the 2 ms USB requirement. |
| USBADR | USB device address |