Datasheet

331
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
18.4.5 Supply Controller Mode Register
Name: SUPC_MR
Address: 0x400E1418
Access: Read/Write
This register can only be written if the WPEN bit is cleared in the System Controller Write Protection Mode Register (SYSC_MR).
 BODRSTEN: Brownout Detector Reset Enable
0 (NOT_ENABLE): The core reset signal “vddcore_nreset” is not affected when a brownout detection occurs.
1 (ENABLE): The core reset signal, vddcore_nreset is asserted when a brownout detection occurs.
Note: This bit is located in the VDDIO domain.
 BODDIS: Brownout Detector Disable
0 (ENABLE): The core brownout detector is enabled.
1 (DISABLE): The core brownout detector is disabled.
Note: This bit is located in the VDDIO domain.
 ONREG: Voltage Regulator Enable
0 (ONREG_UNUSED): Internal voltage regulator is not used (external power supply is used).
1 (ONREG_USED): Internal voltage regulator is used.
Note: This bit is located in the VDDIO domain.
 OSCBYPASS: Oscillator Bypass
0 (NO_EFFECT): No effect. Clock selection depends on XTALSEL value.
1 (BYPASS): The 32 kHz crystal oscillator is selected and put in bypass mode.
Note: This bit is located in the VDDIO domain.
 KEY: Password Key
31 30 29 28 27 26 25 24
KEY
23 22 21 20 19 18 17 16
–––OSCBYPASS––––
15 14 13 12 11 10 9 8
ONREGBODDISBODRSTEN––––
76543210
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Value Name Description
0xA5 PASSWD Writing any other value in this field aborts the write operation.