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

32072H–AVR32–10/2012

BOD

Read/Write

0xD0

0x00000000

This field must be written twice, first with key value 0x55, then 0xAA, for a write operation to have an effect.

Set to 1 when CTRL, HYST and LEVEL fields has been updated by the Flash fuses after power-on reset or Flash fuses update

If one, the CTRL, HYST and LEVEL values will not be updated again by Flash fuses

Can be cleared to allow subsequent overwriting of the value by Flash fuses

0: BOD is off

1: BOD is enabled and can reset the chip

2: BOD is enabled and but cannot reset the chip. Only interrupt will be sent to interrupt controller, if enabled in the IMR register.

3: BOD is off

0: No hysteresis

1: Hysteresis On

This field sets the triggering threshold of the BOD. See Electrical Characteristics for actual voltage levels.

Note that any change to the LEVEL field of the BOD register should be done with the BOD deactivated to avoid spurious reset 

or interrupt.

31

30

29

28

27

26

25

24

KEY

23

22

21

20

19

18

17

16

-

-

-

-

-

-

-

FCD

15

14

13

12

11

10

9

8

-

-

-

-

-

-

CTRL

7

6

5

4

3

2

1

0

-

HYST

LEVEL