The transmit hub address endpoint n 8-bit read/write registers (USBTXHUBADDR[n]), like USBTXHUBPORT[n], must be written only when a USB device is connected to transmit endpoint EPn via a USB 2.0 hub. This register records the address of the USB 2.0 hub through which the target associated with the endpoint is accessed.
Note: USBTXHUBADDR0 is used for both receive and transmit for endpoint 0.
The USBTXHUBADDR[n] registers are shown in Figure 22-27 and described in Table 22-29.
Figure 22-28 USB Transmit Hub Address Endpoint n Registers (USBTXHUBADDR[n])
LEGEND: R/W = Read/Write; -n = value after
reset |
Table 22-30 USB Transmit Hub Address
Endpoint n Registers(USBTXHUBADDR[n]) Field DescriptionsBit | Field | Value | Description |
---|
7 | Reserved | 0 | Reserved |
6-0 | ADDR | 0 | Device Address specifies the USB bus address for the target Device. |