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.