JAJSGX4 February 2019 TUSB8044A
ADVANCE INFORMATION for pre-production products; subject to change without notice.
Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Reset State | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
Bit | Field | Type | Description |
---|---|---|---|
7:4 | RSVD | RO | Reserved. Read only. |
3:0 | used[3:0] | RO/RW | Used. The bits in this field indicate whether a port is enabled.
0 = The port is not used or disabled 1 = The port is used or enabled Each bit corresponds directly to a downstream port, i.e. used0 corresponds to downstream port 1, used1 corresponds to downstream port 2, etc. This field is read only unless the customRmbl bit is set to 1. When the corresponding USB2_ONLY bit is set, the USB2 port will be used and enabled regardless of the bit programmed into this field. |