at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 430

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

USB FIFO Data Register
Register Name:
Access Type:
• FIFO_DATA[7:0]: FIFO Data Value
The microcontroller can push or pop values in the FIFO through this register.
RXBYTECNT in the corresponding USB_CSRx register is the number of bytes to be read from the FIFO (sent by the host).
The maximum number of bytes to write is fixed by the Max Packet Size in the Standard Endpoint Descriptor. It can not be
more than the physical memory size associated to the endpoint. Please refer to the Universal Serial Bus Specification, Rev.
2.0 to get more information.
430
31
23
15
–
–
–
7
AT91RM3400
30
22
14
USB_FDRx [x = 0. 7]
Read/Write
–
–
–
6
29
21
13
–
–
–
5
28
20
12
–
–
–
4
FIFO_DATA
27
19
11
–
–
–
3
26
18
10
–
–
–
2
25
17
–
–
9
–
1
1790A–ATARM–11/03
24
16
–
–
8
–
0