PIC18F45K80-I Datasheet, PDF (475/622 Pages) Microchip Technology – 28/40/44/64-Pin, Enhanced Flash Microcontrollers with ECAN and nanoWatt XLP Technology

PIC18F66K80 FAMILY
28.3.3
OPERATION OF REGULATOR IN
SLEEP
The difference in the two regulators’ operation arises
with Sleep mode. The ultra low-power regulator gives
the device the lowest current in the Regulator Enabled
mode.
The on-chip regulator can go into a lower power mode
when the device goes to Sleep by setting the REGSLP
bit (WDTCON<7>). This puts the regulator in a standby
mode so that the device consumes much less current.
The on-chip regulator can also go into the Ultra Low-
Power mode, which consumes the lowest current
possible with the regulator enabled. This mode is
controlled by the RETEN bit (CONFIG1L<0>) and
SRETEN bit (WDTCON<4>).
The various modes of regulator operation are shown in
Table 28-3.
When the ultra low-power regulator is in Sleep mode,
the internal reference voltages in the chip will be shut
off and any interrupts referring to the internal reference
will not wake up the device. If the BOR or LVD is
enabled, the regulator will keep the internal references
on and the lowest possible current will not be achieved.
When using the ultra low-power regulator in Sleep
mode, the device will take about 250 s to start
executing code after it wakes up.
TABLE 28-3: SLEEP MODE REGULATOR SETTINGS⁽¹⁾
Device
Power Mode
REGSLP
WDTCON<7>
SRETEN
RETEN
WDTCON<4> CONFIG1L<0>
PIC18FXXK80
Normal Operation (Sleep)
0
x
1
PIC18FXXK80
Low-Power mode (Sleep)
1
x
1
PIC18FXXK80
Normal Operation (Sleep)
0
0
0
PIC18FXXK80
Low-Power mode (Sleep)
1
0
0
PIC18FXXK80
Ultra Low-Power mode (Sleep)
x
1
0
PIC18LFXXK80
Reserved⁽²⁾
x
Don’t Care
0
PIC18LFXXK80
Regulator Bypass mode (Sleep)⁽²⁾
x
x
1
Note 1: x — Indicates that VIT status is invalid.
2: The ultra low-power regulator should be disabled (RETEN = 1, ULP disabled) on PIC18LFXXK80 devices
to obtain the lowest possible Sleep current.
 2010-2012 Microchip Technology Inc.
DS39977F-page 475