MSP432P411VIPZ datasheet(135/212 Pages) TI1

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135

MSP432P4111, MSP432P4011, MSP432P411Y

MSP432P401Y, MSP432P411V, MSP432P401V

www.ti.com

SLASEA0A – DECEMBER 2017 – REVISED FEBRUARY 2018

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Product Folder Links: MSP432P4111 MSP432P4011 MSP432P411Y MSP432P401Y MSP432P411V MSP432P401V

Detailed Description

6.8.3.1

Peripherals in LPM3 and LPM4

Most peripherals in MSP432P4x1x devices can be activated in LPM3 out of low-frequency internal or

external clocks. LPM4 mode is LPM3 with peripherals not clocked from internal clock sources. Some

analog modules can be operational in LPM4, because they do not require a clock to operate (for example,

the comparator). Activating a peripheral in LPM3 or LPM4 increases the current consumption due to its

active supply current contribution but also due to an additional idle current. To limit the idle current adder,

certain peripherals are combined into power islands within the device. To achieve optimal current

consumption, use modules within one group and limit the number of groups with active modules. The

grouping is shown in Table 6-44 . Modules not listed in this table are either already included in the

standard LPM3 current consumption or cannot be used in LPM3 or LPM4. The idle current adder is very

small at room temperature (25°C) but increases at high temperatures (85°C); see the idle current

parameters in the electrical characteristics section for details.

Table 6-44. Peripheral Groups (PG)

PG1

PG2

PG3

Timer_A0

eUSCI_A0

eUSCI_B0

Clock output on pins

Timer_A1, Timer_A2

eUSCI_A1, eUSCI_A2, eUSCI_A3

eUSCI_B1, eUSCI_B2, eUSCI_B3

Timer_A3

Precision ADC

Comp_E0, Comp_E1

REF_A

LCD_F

6.8.4

Clock System (CS)

The CS contains the sources of the various clocks in the device and also controls the mapping between

sources and the clock domains in the device.

6.8.4.1

LFXT

The LFXT supports 32.768-kHz low-frequency crystals.

6.8.4.2

HFXT

The HFXT supports high-frequency crystals up to 48 MHz.

6.8.4.3

DCO

The DCO is a power-efficient tunable internal oscillator that generates up to 48 MHz. It also supports a

high-precision mode when using an external precision resistor.

6.8.4.4

Very Low-Power Low-Frequency Oscillator (VLO)

The VLO is an ultra-low-power internal oscillator that generates a low-accuracy clock at typical frequency

of 9.4 kHz.

6.8.4.5

Low-Frequency Reference Oscillator (REFO)

The REFO can be used as an alternate low-power lower-accuracy source of a 32.768-kHz clock instead of

the LFXT. REFO can also be programmed to generate a 128-kHz clock.

6.8.4.6

Module Oscillator (MODOSC)

The MODOSC is an internal clock source that has a very low latency wake-up time. MODOSC is factory-

calibrated to a frequency of 25 MHz. The MODOSC is typically used to supply a clock on request to

modules like the ADC (when in 1-Msps conversion mode).

6.8.4.7

System Oscillator (SYSOSC)

The SYSOSC is a lower-frequency version of the MODOSC and is factory-calibrated to a frequency of 5

MHz. It drives the ADC sampling clock in the 200-ksps conversion mode. In addition, it is also used for

timing of various system-level control and management operations.

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