Overview
The MSP430F6779AIPZR is a 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 microcontroller (MCU) offers high accuracy and low system cost with minimal external components required.
The MSP430F6779AIPZR integrates a high-performance MSP430 CPU with a 32-bit multiplier, enabling efficient metrology calculations. It supports multiple sensors such as current transformers, Rogowski coils, or shunts, and provides power measurement for up to three phases plus neutral.
Key Specifications
| Specification | Details |
|---|---|
| Device Type | Polyphase Metering SoC |
| Flash Memory | Up to 512 KB |
| RAM | Up to 32 KB |
| ADCs | Up to seven independent 24-bit sigma-delta ADCs, 10-bit 200-ksps SAR ADC with six external and two internal channels |
| Timers | Four 16-bit timers with nine total capture/compare registers |
| Communication Interfaces | Six enhanced universal serial communication interfaces (eUSCIs) supporting UART, IrDA, SPI, and I2C |
| Power Supply | Wide input supply voltage range: 3.6 V down to 1.8 V |
| Low-Power Modes | Standby Mode (LPM3): 2.1 µA at 3 V, RTC Mode (LPM3.5): 0.34 µA at 3 V, Shutdown Mode (LPM4.5): 0.18 µA at 3 V |
| Package Options | 100-pin LQFP (PZ) package with 62 I/O pins |
Key Features
- Accuracy < 0.1% over 2000:1 dynamic range for phase current, meeting or exceeding 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, with exact phase-angle measurements and digital phase correction for current transformers.
- Temperature-compensated energy measurements.
- Flexible power supply options with automatic switching.
- 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 and encryption.
- Ultra-low power consumption with multiple low-power modes.
Applications
- 3-phase electronic watt-hour meters.
- Utility metering.
- Energy monitoring.
- Smart grid and building automation.
Q & A
- What is the primary application of the MSP430F6779AIPZR?
The primary application is in 3-phase electronic watt-hour meters, utility metering, and energy monitoring.
- What is the accuracy of the MSP430F6779AIPZR for phase current measurement?
The accuracy is less than 0.1% over a 2000:1 dynamic range.
- What types of sensors does the MSP430F6779AIPZR support?
It supports current transformers, Rogowski coils, or shunts.
- What are the key features of the power measurement capability of the MSP430F6779AIPZR?
It provides power measurement for up to three phases plus neutral, with dedicated pulse output pins for active and reactive energy calibration.
- How does the MSP430F6779AIPZR handle low-power modes?
It has multiple low-power modes, including Standby Mode (LPM3), RTC Mode (LPM3.5), and Shutdown Mode (LPM4.5), with very low current consumption.
- What is the role of the integrated security modules in the MSP430F6779AIPZR?
The integrated security modules support anti-tamper and encryption.
- What are the package options available for the MSP430F6779AIPZR?
It is available in a 100-pin LQFP (PZ) package with 62 I/O pins.
- How does the MSP430F6779AIPZR manage temperature compensation?
It provides temperature-compensated energy measurements.
- What is the significance of the LCD driver in the MSP430F6779AIPZR?
The LCD driver supports up to 320 segments with contrast control.
- What development tools are available for the MSP430F6779AIPZR?
Development tools include the Energy Measurement Design Center, the EVM430-F6779 three-phase electricity meter evaluation module, and the MSP-TS430PEU128 target development board.
