Datasheet

23.5.1 Supply Controller Control Register
Name: SUPC_CR
Offset: 0x00
Property: Write-only
Bit 31 30 29 28 27 26 25 24
KEY[7:0]
Access
W W W W W W W W
Reset
Bit 23 22 21 20 19 18 17 16
Access
Reset
Bit 15 14 13 12 11 10 9 8
Access
Reset
Bit 7 6 5 4 3 2 1 0
XTALSEL VROFF
Access
W W
Reset
Bits 31:24 – KEY[7:0] Password
Value Name Description
0xA5
PASSWD Writing any other value in this field aborts the write operation.
Bit 3 – XTALSEL Crystal Oscillator Select
Note: This bit is located in the
VDDIO domain.
Value Description
0
(NO_EFFECT): No effect.
1
(CRYSTAL_SEL): If KEY is correct, XTALSEL switches the slow clock on the 32.768 kHz crystal
oscillator output.
Bit 2 – VROFF V
oltage Regulator Off
Note: This bit is located in the VDDIO domain.
Value Description
0
(NO_EFFECT): No effect.
1
(STOP_VREG): If KEY is correct, VROFF asserts the vddcore_nreset and stops the voltage regulator.
SAM E70/S70/V70/V71 Family
Supply Controller (SUPC)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 166