1.1 Features 1

• Low Supply Voltage Range:

3.6 V Down to 1.8 V

• Ultra-Low Power Consumption

– Active Mode (AM):

All System Clocks Active

265 μA/MHz at 8 MHz, 3.0 V, Flash Program

Execution (Typical)

140 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, 2.5 μA at 3.0 V (Typical)

– Off Mode (LPM4):

Full RAM Retention, Supply Supervisor

Operational, Fast Wakeup:

1.6 μA at 3.0 V (Typical)

– Shutdown RTC Mode (LPM3.5):

Shutdown Mode, Active Real-Time Clock (RTC)

With Crystal:

1.24 μA at 3.0 V (Typical)

– Shutdown Mode (LPM4.5):

0.78 μA at 3.0 V (Typical)

• Wake up From Standby Mode in 3 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

– System Operation From up to Two Auxiliary

Power Supplies

• 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 (XT1)

• One 16-Bit Timer With Three Capture/Compare

Registers

• Three 16-Bit Timers With Two Capture/Compare

Registers Each

• Enhanced Universal Serial Communication

Interfaces

– eUSCI_A0, eUSCI_A1, and eUSCI_A2

– Enhanced UART Supports Automatic Baud-

Rate Detection

– IrDA Encoder and Decoder

– Synchronous SPI

– eUSCI_B0

– I2C With Multiple Slave Addressing

– Synchronous SPI

• Password-Protected RTC With Crystal Offset

Calibration and Temperature Compensation

• Separate Voltage Supply for Backup Subsystem

– 32-kHz Low-Frequency Oscillator (XT1)

– Real-Time Clock

– Backup Memory (4 × 16 Bits)

• Three 24-Bit Sigma-Delta Analog-to-Digital

Converters (ADCs) With Differential PGA Inputs

• Integrated LCD Driver With Contrast Control for up

to 320 Segments in 8-Mux Mode

• Hardware Multiplier Supports 32-Bit Operations

• 10-Bit 200-ksps ADC

– Internal Reference

– Sample-and-Hold, Autoscan Feature

– Up to Six External Channels and Two Internal

Channels, Including Temperature Sensor

• 3-Channel Internal DMA

• Serial Onboard Programming, No External

Programming Voltage Needed

• Single-Phase Electronic Watt-Hour Meter

Development Tool (Also See Tools and Software)

– EVM430-F6736 - MSP430F6736 EVM for

Metering

– Energy Measurement Design Center for

MSP430™ MCUs

• Device Comparison Summarizes the Available

Family Members

• Available in 100-Pin and 80-Pin LQFP Packages

1.2 Applications

• 2-Wire Single-Phase Metering

• 3-Wire Single-Phase Metering

• Tamper-Resistant Meters

1.3 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 lowpower

modes to active mode in 3 μs (typical).

The MSP430F673x and MSP430F672x microcontrollers feature up to three high-performance 24-bit

sigma-delta ADCs, a 10-bit ADC, four enhanced universal serial communication interfaces (three

eUSCI_A modules and one eUSCI_B module), four 16-bit timers, a hardware multiplier, a DMA module,

an RTC module with alarm capabilities, an LCD driver with integrated contrast control, an auxiliary supply

system, and up to 72 I/O pins in the 100-pin devices and 52 I/O pins in the 80-pin devices.

For complete module descriptions, see the MSP430F5xx and MSP430F6xx Family User's Guide.