Microchip Technology MA240029 データシート
2010-2011 Microchip Technology Inc.
DS39996F-page 155
PIC24FJ128GA310 FAMILY
10.0
POWER-SAVING FEATURES
The PIC24FJ128GA310 family of devices provides the
ability to manage power consumption by selectively
managing clocking to the CPU and the peripherals. In
general, a lower clock frequency and a reduction in the
number of circuits being clocked reduces consumed
power.
PIC24FJ128GA310 family devices manage power
consumption with five strategies:
• Instruction-Based Power Reduction Modes
• Hardware-Based Power Reduction Features
• Clock Frequency Control
• Software Controlled Doze Mode
• Selective Peripheral Control in Software
Combinations of these methods can be used to
selectively tailor an application’s power consumption,
while still maintaining critical application features, such
as timing-sensitive communications.
ability to manage power consumption by selectively
managing clocking to the CPU and the peripherals. In
general, a lower clock frequency and a reduction in the
number of circuits being clocked reduces consumed
power.
PIC24FJ128GA310 family devices manage power
consumption with five strategies:
• Instruction-Based Power Reduction Modes
• Hardware-Based Power Reduction Features
• Clock Frequency Control
• Software Controlled Doze Mode
• Selective Peripheral Control in Software
Combinations of these methods can be used to
selectively tailor an application’s power consumption,
while still maintaining critical application features, such
as timing-sensitive communications.
10.1
Overview of Power-Saving Modes
In addition to full-power operation, otherwise known as
Run mode, the PIC24FJ128GA310 family of devices
offers three Instruction-Based, Power-Saving modes
and one Hardware-Based mode:
• Idle
• Sleep (Sleep and Low-Voltage Sleep)
• Deep Sleep
• V
Run mode, the PIC24FJ128GA310 family of devices
offers three Instruction-Based, Power-Saving modes
and one Hardware-Based mode:
• Idle
• Sleep (Sleep and Low-Voltage Sleep)
• Deep Sleep
• V
BAT
(with and without RTCC)
All four modes can be activated by powering down dif-
ferent functional areas of the microcontroller, allowing
progressive reductions of operating and Idle power
consumption. In addition, three of the modes can be
tailored for more power reduction, at a trade-off of
some operating features.
ferent functional areas of the microcontroller, allowing
progressive reductions of operating and Idle power
consumption. In addition, three of the modes can be
tailored for more power reduction, at a trade-off of
some operating features.
lists all of the
operating modes, in order of increasing power savings.
summarizes how the microcontroller exits
the different modes. Specific information is provided in
the following sections.
the following sections.
TABLE 10-1:
OPERATING MODES FOR PIC24FJ128GA310 FAMILY DEVICES
Note:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive
reference source. For more information,
refer to the “PIC24F Family Reference
Manual”
of this group of PIC24FJ devices. It is not
intended to be a comprehensive
reference source. For more information,
refer to the “PIC24F Family Reference
Manual”
, “Section 57. Power-Saving
Features with V
BAT
”
(DS30622).
Mode
Entry
Active Systems
Core
Peripherals
Data RAM
Retention
RTCC
DSGPR0/
DSGPR1
Retention
Run (default)
N/A
Y
Y
Y
Y
Y
Idle
Instruction
N
Y
Y
Y
Y
Sleep:
Sleep
Instruction
N
S
Y
Y
Y
Low-Voltage Sleep
Instruction +
RETEN bit
N
S
Y
Y
Y
Deep Sleep:
Deep Sleep
Instruction +
DSEN bit +
N
N
N
Y
Y
V
BAT
:
with RTCC
Hardware
N
N
N
Y
Y
Note 1:
If RTCC is otherwise enabled in firmware.
2:
A select peripheral can operate during this mode from LPRC or some external clock.