SAM4CM_14 Datasheet, PDF (1005/1177 Pages) ATMEL Corporation – Atmel | SMART ARM-based Flash MCU

40.7.18 ADC Analog Control Register
Name:
Address:
Access:
ADC_ACR
0x40038094
Read/Write
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
ONREF
FORCEREF
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
IRVS
IRVCE
–
–
This register can only be written if the WPEN bit is cleared in “ADC Write Protection Mode Register” .
• IRVCE: Internal Reference Voltage Change Enable
0 (STUCK_AT_DEFAULT): The internal reference voltage is stuck at the default value (see the Electrical Characteristics
for further details).
1 (SELECTION): The internal reference voltage is defined by field IRVS.
• IRVS: Internal Reference Voltage Selection
See the “Programmable Voltage Reference Selection Values” table in the Electrical Characteristics for further details.
• FORCEREF: Force Internal Reference Voltage
0: The internal voltage reference is defined.
1: The internal voltage reference is forced to VDDIO (ONREF must be cleared).
• ONREF: Internal Voltage Reference ON
0: The external pin ADVREF defines the voltage reference.
1: The internal voltage reference is selected (FORCEREF must be cleared).
SAM4CM Series [DATASHEET]
Atmel-11203C-ATARM-SAM4CM32-SAM4CM16-SAM4CM8-Datasheet_06-Oct-14
1005