Overview
The MSP430F67791AIPEUR is a highly integrated polyphase metering System-on-Chip (SoC) developed by Texas Instruments. It is part of the MSP430™ Metrology and Monitoring MCU portfolio, specifically designed for energy measurement and power monitoring applications, including smart grid and building automation. This SoC offers high accuracy and low system cost with minimal external components required. It features a high-performance MSP430 CPU with a 32-bit multiplier, up to 512KB of flash memory, and 32KB of RAM. The device also includes an LCD controller supporting up to 320 segments and multiple communication interfaces for smart meter implementations.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | LQFP (PEU) with 128 pins |
| Flash Memory | Up to 512KB |
| RAM | Up to 32KB |
| ADCs | Up to seven independent 24-bit sigma-delta ADCs, 10-bit 200-ksps SAR ADC with six external and two internal channels |
| CPU | High-performance 25-MHz CPU with 32-bit multiplier |
| Input Supply Voltage Range | 3.6 V down to 1.8 V |
| Operating Temperature Range | -40°C to 85°C |
| Standby Power (LPM3) | 2.1 µA at 3 V |
| Communication Interfaces | Six enhanced universal serial communication interfaces (eUSCIs) supporting UART, IrDA, SPI, and I2C |
| Timers | Four 16-bit timers with nine total capture/compare registers |
| GPIO Pins | 90 GPIO pins |
Key Features
- Accuracy < 0.1% over 2000:1 dynamic range for phase current
- Meets or exceeds ANSI C12.20 and IEC 62053 standards
- Support for multiple sensors such as current transformers, Rogowski coils, or shunts
- Power measurement for up to three phases plus neutral
- Dedicated pulse output pins for active and reactive energy for calibration
- 4-quadrant measurement per phase or cumulative
- Exact phase-angle measurements and digital phase correction for current transformers
- Temperature-compensated energy measurements
- 40-Hz to 70-Hz line frequency range using single calibration
- Flexible power supply options with automatic switching
- Display operates at very low power during AC mains failure: 3 µA in LPM3
- LCD driver with contrast control for up to 320 segments
- Password-protected real-time clock (RTC) with tamper detection, crystal offset calibration, and temperature compensation
- Integrated security modules to support anti-tamper
- Multiple low-power modes including standby, RTC, and shutdown modes
Applications
The MSP430F67791AIPEUR is designed for various energy measurement and power monitoring applications, including:
- Smart grid systems
- Building automation
- Three-phase electronic watt-hour meters
- Smart meters
- Energy monitoring and control systems
Q & A
- What is the primary application of the MSP430F67791AIPEUR?
The primary application is for energy measurement and power monitoring, particularly in smart grid and building automation systems.
- What are the key ADC features of the MSP430F67791AIPEUR?
The device features up to seven independent 24-bit sigma-delta ADCs and a 10-bit 200-ksps SAR ADC with six external and two internal channels.
- What standards does the MSP430F67791AIPEUR comply with?
It meets or exceeds ANSI C12.20 and IEC 62053 standards.
- What is the power consumption in standby mode?
The standby power consumption is 2.1 µA at 3 V in LPM3 mode.
- What communication interfaces are supported?
The device supports six enhanced universal serial communication interfaces (eUSCIs) for UART, IrDA, SPI, and I2C.
- What is the operating temperature range of the MSP430F67791AIPEUR?
The operating temperature range is -40°C to 85°C.
- Does the MSP430F67791AIPEUR have integrated security features?
Yes, it includes integrated security modules to support anti-tamper functions.
- What development tools are available for the MSP430F67791AIPEUR?
Development tools include the Energy Measurement Design Center, the EVM430-F6779 three-phase electricity meter evaluation module, and the MSP-TS430PEU128 128-pin target development board.
- How does the LCD driver operate during AC mains failure?
The display operates at very low power, consuming 3 µA in LPM3 mode during AC mains failure.
- What is the maximum flash memory available on the MSP430F67791AIPEUR?
The maximum flash memory available is up to 512KB.
