SAM7X128_14 Datasheet, PDF (449/662 Pages) ATMEL Corporation – ARM-based Flash MCU

34.6.3 UDP Function Address Register
Register Name:
UDP_ FADDR
Access Type:
Read-write
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
–
–
–
–
–
–
7
6
5
4
3
2
–
FADD
9
8
–
FEN
1
0
• FADD[6:0]: Function Address Value
The Function Address Value must be programmed by firmware once the device receives a set address request from the host, and
has achieved the status stage of the no-data control sequence. Refer to the Universal Serial Bus Specification, Rev. 2.0 for more
information. After power up or reset, the function address value is set to 0.
• FEN: Function Enable
Read:
0 = Function endpoint disabled.
1 = Function endpoint enabled.
Write:
0 = Disables function endpoint.
1 = Default value.
The Function Enable bit (FEN) allows the microcontroller to enable or disable the function endpoints. The microcontroller sets this
bit after receipt of a reset from the host. Once this bit is set, the USB device is able to accept and transfer data packets from and
to the host.
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
449