1 Features

• Low supply voltage range:

3.6 V down to 1.8 V

• Ultra-low power consumption

– Active mode (AM):

all system clocks active

230 μA/MHz at 8 MHz, 3.0 V, flash program

execution (typical)

110 μA/MHz at 8 MHz, 3.0 V, RAM program

execution (typical)

– Standby mode (LPM3):

real-time clock (RTC) with crystal, watchdog,

and supply supervisor operational, full RAM

retention, fast wakeup:

1.7 μA at 2.2 V, 2.1 μA at 3.0 V (typical)

low-power oscillator (VLO), general-purpose

counter, watchdog, and supply supervisor

operational, full RAM retention, fast wakeup:

1.2 μA at 3.0 V (typical)

– Off mode (LPM4):

full RAM retention, supply supervisor

operational, fast wakeup:

1.2 μA at 3.0 V (typical)

– Shutdown mode (LPM4.5):

0.1 μA at 3.0 V (typical)

• Wake up from standby mode in 3.5 μs (typical)

• 16-bit RISC architecture

– Extended memory

– Up to 25-MHz system clock

• Flexible power-management system

– Fully integrated LDO with programmable

regulated core supply voltage

– Supply voltage supervision, monitoring, and

brownout

• Unified clock system

– FLL control loop for frequency stabilization

– Low-power low-frequency internal clock source

(VLO)

– Low-frequency trimmed internal reference

source (REFO)

– 32-kHz crystals

– High-frequency crystals up to 32 MHz

• 16-bit timer TA0, Timer_A with five capture/

compare registers

• 16-bit timer TA1, Timer_A with three capture/

compare registers

• 16-bit timer TB0, Timer_B with seven capture/

compare shadow registers

• Up to four universal serial communication

interfaces (USCIs)

– USCI_A0, USCI_A1, USCI_A2, and USCI_A3

each support:

• Enhanced UART supports automatic baudrate

detection

• IrDA encoder and decoder

• Synchronous SPI

– USCI_B0, USCI_B1, USCI_B2, and USCI_B3

each support:

• I2C

• Synchronous SPI

• 12-bit analog-to-digital converter (ADC)

– Internal reference

– Sample-and-hold

– Autoscan feature

– 14 external channels, 2 internal channels

• Hardware multiplier supports 32-bit operations

• Serial onboard programming, no external

programming voltage needed

• 3-channel internal DMA

• Basic timer with RTC feature

• Device Comparison summarizes the available

family members

2 Applications

• Analog and Digital Sensor Systems

• Digital Motor Controls

• Remote Controls

• Thermostats

• Digital Timers

• Hand-Held Meters

3 Description

The TI MSP family of ultra-low-power microcontrollers consists of several devices featuring different sets of

peripherals targeted for various applications. The architecture, combined with extensive low-power modes, is

optimized to achieve extended battery life in portable measurement applications. The device features a powerful

16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The

digitally controlled oscillator (DCO) allows the device to wake up from low-power modes to active mode in 3.5 μs

(typical).