Datasheet

 2011-2013 Microchip Technology Inc. DS39995D-page 133
PIC24FV32KA304 FAMILY
10.4 Voltage Regulator-Based
Power-Saving Features
The PIC24FV32KA304 series devices have a Voltage
Regulator that has the ability to alter functionality to
provide power savings. The on-board regulator is made
up of two basic modules: the Voltage Regulator
(VREG) and the Retention Regulator (RETREG). With
the combination of VREG and RETREG, the following
power modes are available:
10.4.1 RUN MODE
In Run mode, the main VREG is providing a regulated
voltage with enough current to supply a device running
at full speed, and the device is not in Sleep or Deep
Sleep Mode. The Retention Regulator may or may not
be running, but is unused.
10.4.2 SLEEP (STANDBY) MODE
In Sleep mode, the device is in Sleep and the main
VREG is providing a regulated voltage at a reduced
(standby) supply current. This mode provides for
limited functionality due to the reduced supply current.
It requires a longer time to wake-up from Sleep.
10.4.3 RETENTION SLEEP MODE
In Retention Sleep mode, the device is in Sleep and all
regulated voltage is provided solely by the Retention
Regulator. Consequently, this mode has lower power
consumption than regular Sleep mode, but is also
limited in terms of how much functionality can be
enabled. Retention Sleep wake-up time is longer than
Sleep mode due to the extra time required to raise the
V
CORE supply rail back to normal regulated levels.
10.4.4 DEEP SLEEP MODE
In Deep Sleep mode, both the main Voltage Regulator
and Retention Regulator are shut down, providing the
lowest possible device power consumption. However,
this mode provides no retention or functionality of the
device and has the longest wake-up time.
TABLE 10-1: VOLTAGE REGULATION CONFIGURATION SETTINGS FOR PIC24FV32KA304
FAMILY DEVICES
Note: PIC24F32KA30X family devices do not
use an On-Chip Voltage Regulator, so
they do not support Retention Sleep
mode.
RETCGF Bit
(FPOR<2>)
RETEN Bit
(RCON<12>
PMSLP Bit
(RCON<8>)
Power Mode
During Sleep
Description
001Sleep
VREG mode (normal) is unchanged during Sleep.
RETREG is unused.
000
Sleep
(Standby)
VREG goes to Low-Power Standby mode during
Sleep. RETREG is unused.
010
Retention
Sleep
VREG is off during Sleep. RETREG is enabled and
provides Sleep voltage regulation.
1X1Sleep
VREG mode (normal) is unchanged during Sleep.
RETREG is disabled at all times.
1X0
Sleep
(Standby)
VREG goes to Low-Power Standby mode during
Sleep. RETREG is disabled at all times