Data Sheet

202
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
16.8.15 Voltage Regulator System (VREG) Control
Name: VREG
Offset: 0x3C
Reset: 0x0X00
Property: Write-Protected
z Bits 15:14 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z Bit 13 – FORCELDO: Force LDO Voltage Regulator
0: The voltage regulator is in low power and low drive configuration in standby sleep mode.
1: The voltage regulator is in low power and high drive configuration in standby sleep mode.
z Bits 12:7 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z Bit 6 – RUNSTDBY: Run in Standby
0: The voltage regulator is in low power configuration in standby sleep mode.
1: The voltage regulator is in normal configuration in standby sleep mode.
z Bits 5:0 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
Bit 151413121110 9 8
FORCELDO
AccessRRR/WRRRRR
Reset00000000
Bit 76543210
RUNSTDBY
AccessRR/WRRRRRR
Reset00000000