Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK 数据表

42023E–SAM–07/2013

UPINRQn, n in [0..7]

Read/Write

0x0650 + (n * 0x04)

0x00000001

Writing a zero to this bit will perform a pre-defined number of IN requests. This number is the INRQ field.

Writing a one to this bit will allow the USBC to perform infinite IN requests when the pipe is not frozen.

This field contains the number of IN transactions before the USBC freezes the pipe. The USBC will perform INRQ IN requests 

before freezing the pipe. This counter is automatically decreased by 1 each time an IN request has been successfully 

performed.

This register has no effect when the INMODE bit is 1(infinite IN requests generation till the pipe is not frozen).

31

30

29

28

27

26

25

24

-

-

-

-

-

-

-

-

23

22

21

20

19

18

17

16

-

-

-

-

-

-

-

-

15

14

13

12

11

10

9

8

-

-

-

-

-

-

-

INMODE

7

6

5

4

3

2

1

0

INRQ