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MSP430FR5972 Datasheet, PDF (58/142 Pages) Texas Instruments – Mixed‑Signal Microcontrollers
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MSP430FR5972, MSP430FR59721, MSP430FR5970, MSP430FR5922, MSP430FR59221
MSP430FR5872, MSP430FR58721, MSP430FR5870
SLASE66A – APRIL 2015 – REVISED MAY 2015
www.ti.com
6.3 Operating Modes
The device has one active mode and seven software selectable low-power modes of operation. An interrupt event can wake up the device from
low-power modes LPM0 through LPM4, service the request, and restore back to the low-power mode on return from the interrupt program. Low-
power modes LPM3.5 and LPM4.5 disable the core supply to minimize power consumption.
Table 6-1. Operating Modes
Mode
AM
LPM0
LPM1
LPM2
LPM3
LPM4
LPM3.5
LPM4.5
Maximum System Clock
Active
Active,
FRAM Off
(1)
16 MHz
CPU Off (2)
16 MHz
CPU Off
16 MHz
Standby
50 kHz
Standby
50 kHz
Off
RTC-only
Shutdown
with SVS
Shutdown
without
SVS
0 (3)
50 kHz
0 (3)
Typical Current Consumption,
25°C
103
µA/MHz
65 µA/MHz
75 µA at
1 MHz
40 µA at
1 MHz
0.9 µA
0.4 µA
0.3 µA
0.35 µA
0.2 µA
0.02 µA
Typical Wake-up time
N/A
instant.
6 µs
6 µs
7 µs
7 µs
250 µs
250 µs
1000 µs
Wake-up events
N/A
all
all
LF
RTC
I/O
Comp
LF
RTC
I/O
Comp
_
I/O
Comp
RTC
I/O
_
I/O
CPU
on
off
off
off
off
off
reset
reset
FRAM
on
off (1)
standby (or off
(1))
off
off
off
off
off
off
High-frequency peripherals
Low-frequency peripherals
Unclocked peripherals(5)
available
available
available
available
available
available
available
available
available
off
available
available
off
available (4)
available (4)
off
off
available (4)
reset
RTC
reset
reset
reset
reset
MCLK
SMCLK
on
off
off
off
off
off
off
off
opt. (6)
opt. (6)
opt. (6)
off
off
off
off
off
ACLK
Full retention
SVS
on
yes
always
on
yes
always
on
yes
always
on
yes
opt. (8)
on
yes (7)
opt. (8)
off
yes (7)
opt. (8)
off
no
opt. (8)
on (9)
off
no
off (10)
Brownout
always
always
always
always
always
always
always
always
(1) FRAM disabled in FRAM controller
(2) Disabling the FRAM via the FRAM controller decreases the LPM current consumption, but the wake-up time can increase. If the wake-up is for FRAM access (for example, to fetch an
interrupt vector), wake-up time is increased. If the wake-up is for a non-FRAM operation (for example, DMA transfer to RAM), wake-up time is not increased.
(3) All clocks disabled
(4) See Section 6.3.1, which describes the use of peripherals in LPM3 and LPM4.
(5) "Unclocked peripherals" are peripherals that do not require a clock source to operate; for example, the comparator and REF, or the eUSCI when operated as an SPI slave.
(6) Controlled by SMCLKOFF
(7) Using the RAM Controller, the RAM can be completely powered down to save leakage; however, all data is lost.
(8) Activated SVS (SVSHE = 1) results in higher current consumption. SVS not included in typical current consumption.
(9) SVSHE = 1
(10) SVSHE = 0
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Detailed Description
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