at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 417

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

USB Function Address Register
Register Name:
Access Type:
• 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. Please refer to the Universal Serial Bus Specifica-
tion, Rev. 2.0 to get 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 = Disable 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.
1790A–ATARM–11/03
31
23
15
–
–
–
7
–
30
22
14
USB_FADDR
Read/Write
–
–
–
6
29
21
13
–
–
–
5
28
20
12
–
–
–
4
FADD
27
19
11
–
–
–
3
26
18
10
–
–
–
2
AT91RM3400
25
17
–
–
9
–
1
FEN
24
16
–
–
8
0
417