Datasheet

Table Of Contents
...........continued
Power Domain State
Sleep Mode HIBCFG.BR
AMCFG
BKUPCFG.
BRAMCFG
PDCORESW PDBACKUP PDBKUPRAM
Off N/A N/A off off off
18.6.3.6 Regulators, RAMs, and NVM State in Sleep Mode
By default, in standby sleep mode and backup sleep mode, the RAMs, NVM, and regulators are
automatically set in low-power mode in order to reduce power consumption:
The RAM is in low-power mode if the device is in standby mode.
Non-Volatile Memory - the NVM is automatically set in low power mode in these conditions:
When the device is in standby sleep mode and the NVM is not accessed. This behavior can be
changed by software by configuring the SLEEPPRM bit group of the CTRLB register in the
NVMCTRL peripheral.
When the device is in idle sleep mode and the NVM is not accessed. This behavior can be
changed by software by configuring the SLEEPPRM bit group of the CTRLB register in the
NVMCTRL peripheral.
Regulators: by default, in standby sleep mode, the PM analyzes the device activity to use either the
main or the low-power voltage regulator to supply the VDDCORE.
GCLK clocks, regulators and RAM are not affected in idle sleep mode and will operate as normal.
Table 18-5. Regulators, RAMs, and NVM state in Sleep Mode
Sleep Mode SRAM Mode NVM Regulators
VDDCORE VDDBU
main ULP
Active normal normal on on on
Idle auto
(1)
on on on on
Standby - case 1 normal auto
(1)
auto
(2)
on on
Standby - case 2 low power low power auto
(2)
on on
Standby - case 3 low power low power auto
(2)
on on
Standby - case 4 low power low power off on on
Backup off off off off on
OFF off off off off off
Note: 
1. auto: by default, NVM is in low-power mode if not accessed.
2. auto: by default, the main voltage regulator is on if GCLK, APBx, or AHBx clock is running during
SleepWalking.
Related Links
18.6.3.5 Power Domain Controller
SAM D5x/E5x Family Data Sheet
PM – Power Manager
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 221