Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD データシート
製品コード
AT32UC3A3-XPLD
73
32072H–AVR32–10/2012
AT32UC3A3
7.6.15
Bandgap Calibration Register
Name:
BGCR
Access Type:
Read/Write
Offset:
0xC4
Reset Value:
0x00000000
• KEY: Register Write protection
This field must be written twice, first with key value 0x55, then 0xAA, for a write operation to have an effect.
• FCD: Flash Calibration Done
Set to 1 when the CALIB field has been updated by the Flash fuses after power-on reset or when the Flash fuses are
reprogrammed. The CALIB field will not be updated again by the Flash fuses until a new power-on reset or the FCD field is
written to zero.
• CALIB: Calibration value
Calibration value for Bandgap. See Electrical Characteristics for voltage values.
It is not recommended to override default factory settings in the BGCR register. Flash reliability is not guaranted if this value is
modified by the user
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
-
-
-
-
-
-
-
-
7
6
5
4
3
2
1
0
-
-
-
-
-
CALIB