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SLAS826F – MARCH 2015 – REVISED MARCH 2017
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Detailed Description
Copyright © 2015–2017, Texas Instruments Incorporated
6.8.2.2
Supply Supervisor and Monitor for High Side (SVSMH)
The SVSMH supervises and monitors the V
CC
. SVSMH has a programmable threshold setting and can be
used by the application to generate a reset or an interrupt if the V
CC
dips below the desired threshold. In
supervisor mode, the SVSMH generates a device reset (POR class reset). In monitor mode, the SVSMH
generates an interrupt. The SVSMH can also be disabled if monitoring and supervision of the supply
voltage are not required (offers further power savings).
6.8.2.3
Core Voltage Regulator
The MSP432P401x MCUs can be programmed to operate either with an LDO or with a DC-DC as the
voltage regulator for the digital logic in the core domain of the device. The DC-DC offers significant boost
in power efficiency for high-current high-performance applications. The LDO is a highly efficient regulator
that offers power advantages at lower V
CC
ranges and in the ultra-low-power modes of operation.
The core operating voltage (output of the LDO or DC-DC) is automatically set by the device depending on
the selected operating mode of the device (see
for further details). The device offers seamless
switching between LDO and DC-DC operating modes and also implements a seamless DC-DC fail-safe
mechanism.
6.8.3
Power Control Manager (PCM)
The PCM controls the operating modes of the device and the switching between the modes. This is
controlled by the application, which can choose modes to meet its power and performance requirements.
lists the operating modes of the device.
Table 6-42. MSP432P401x Operating Modes
OPERATING MODE
DESCRIPTION
AM_LDO_VCORE0
LDO based active mode, normal performance, core voltage level 0
LPM0_LDO_VCORE0
Same as above, except that CPU is OFF (no code execution)
AM_LDO_VCORE1
LDO based active mode, maximum performance, core voltage level 1
LPM0_LDO_VCORE1
Same as above, except that CPU is OFF (no code execution)
AM_DCDC_VCORE0
DC-DC based active mode, normal performance, core voltage level 0
LPM0_DCDC_VCORE0
Same as above, except that CPU is OFF (no code execution)
AM_DCDC_VCORE1
DC-DC based active mode, maximum performance, core voltage level 1
LPM0_DCDC_VCORE1
Same as above, except that CPU is OFF (no code execution)
AM_LF_VCORE0
LDO based low-frequency active mode, core voltage level 0
LPM0_LF_VCORE0
Same as above, except that CPU is OFF (no code execution)
AM_LF_VCORE1
LDO based low-frequency active mode, core voltage level 1
LPM0_LF_VCORE1
Same as above, except that CPU is OFF (no code execution)
LPM3_VCORE0
LDO based low-power mode with full state retention, core voltage level 0, RTC and WDT can be active
LPM3_VCORE1
LDO based low-power mode with full state retention, core voltage level 1, RTC and WDT can be active
LPM4_VCORE0
LDO based low-power mode with full state retention, core voltage level 0, all peripherals disabled.
LPM4_VCORE1
LDO based low-power mode with full state retention, core voltage level 1, all peripherals disabled
LPM3.5
LDO based low-power mode, core voltage level 0, no retention of peripheral registers, RTC and WDT can be
active
LPM4.5
Core voltage turned off, wake-up only through pin reset or wake-up capable I/Os