Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD 数据表

32072H–AVR32–10/2012

Name:

OSCCTRL0,1

Read/Write

0x28-0x2C

0x00000000

Select startup time for the oscillator.

Choose between crystal, or external clock

0: External clock connected on XIN, XOUT can be used as an I/O (no crystal)

1 to 3: reserved 

4: Crystal is connected to XIN/XOUT - Oscillator is used with gain G0 ( XIN from 

0.4 MHz to 0.9 MHz ).

5: Crystal is connected to XIN/XOUT - Oscillator is used with gain G1 ( XIN from 

0.9 MHz to 3.0 MHz ).

6: Crystal is connected to XIN/XOUT - Oscillator is used with gain G2 ( XIN from 

3.0 MHz to 8.0 MHz ).

7: Crystal is connected to XIN/XOUT - Oscillator is used with gain G3 ( XIN from 

8.0 Mhz).

31

30

29

28

27

26

25

24

-

-

-

-

-

-

-

-

23

22

21

20

19

18

17

16

-

-

-

-

-

-

-

-

15

14

13

12

11

10

9

8

-

-

-

-

-

STARTUP

7

6

5

4

3

2

1

0

-

-

-

-

-

MODE