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Texas Instruments MSP430F6778AIPEU
- Part No.:
- MSP430F6778AIPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F6778AIPEU.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,572
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Product details
Overview
MSP430F6778AIPEU from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates seven 24-bit sigma-delta ADCs (±0.1% accuracy over 2000:1 dynamic range), a 25-MHz CPU with 32-bit multiplier, 512KB flash/16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all in a 128-pin LQFP package for ANSI C12.20 and IEC 62053-compliant meter designs.
For engineers reviewing the MSP430F6778AIPEU datasheet, MSP430F6778AIPEU pinout, MSP430F6778AIPEU application, or MSP430F6778AIPEU equivalent, key selection criteria include its 7-channel SD24_B ADC architecture, RTC with tamper detection, dual eUSCI_A/B interfaces (UART/I²C/SPI), ultra-low-power LPM3.5 mode (0.34 µA), and support for shunt/CT/Rogowski sensor inputs in 3-phase 4-wire star topologies.
Technical Context
The MSP430F6778AIPEU implements a dedicated metrology subsystem with independent 24-bit sigma-delta modulators per phase channel, each configurable for differential input, programmable gain, and digital phase correction - enabling exact phase-angle measurement and 4-quadrant power calculation per phase. Its SD24_B module supports simultaneous sampling across up to seven channels with internal reference and temperature-compensated calibration.
Digital processing is handled by a 16-bit RISC CPU augmented with a 32-bit hardware multiplier, three-channel DMA, four 16-bit timers, and integrated peripherals including AES-128, CRC-16, and RTC with crystal offset calibration. Power management includes automatic supply switching between AC mains and backup battery, with LCD operation at 3 µA in LPM3 during mains failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Seven independent 24-bit sigma-delta ADCs (SD24_B) for simultaneous voltage/current sampling per phase and neutral. |
| Accuracy | <0.1% error over 2000:1 dynamic range for phase current - meets ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.5S requirements. |
| CPU & Memory | 25-MHz MSP430 CPU with 32-bit hardware multiplier; 512KB single-cycle flash, 16KB RAM (not 32KB - confirmed via Device Comparison Table 3-1). |
| Power Modes | LPM3.5 (RTC active): 0.34 µA at 3 V; LPM4.5 (shutdown): 0.18 µA; wake-up from LPM3 in <5 µs - enables long battery backup. |
| Communication | Four eUSCI_A modules (UART/IrDA/SPI) + two eUSCI_B modules (SPI/I²C); supports isolated RS-485, optical port, and NFC interface stacks. |
| LCD Driver | Supports up to 320 segments with contrast control and operates at 3 µA in LPM3 during AC failure - sustains display without external boost. |
| Security | Hardware AES-128 encryption engine + password-protected RTC with tamper detection and crystal offset calibration - prevents unauthorized firmware access and clock manipulation. |
Pinout & Package
128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 90 GPIOs, thermally enhanced exposed pad (not electrically connected). Pin functions include dedicated SDxP/N analog inputs for sigma-delta modulators, COMx/LCDCAP for segment LCD drive, AUXVCCx for auxiliary analog supplies, and dual VASYS/VDYS pairs requiring external board-level connection per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0 / SD0N0 – SD6P0 / SD6N0 | Sigma-delta modulator differential inputs | Seven independent analog front-end channels for phase A/B/C and neutral current/voltage sensing; supports CT, Rogowski, or shunt sensors. |
| COM0–COM7 | LCD common outputs | Eight common-line drivers supporting multiplexed LCD displays up to 8×40 segments (320 total); enables direct drive of utility meter glass displays. |
| VASYS1/VASYS2, VDSYS1/VDSYS2 | Analog/digital system supply pairs | Must be externally shorted on PCB per TI requirement; separates analog noise domains while maintaining shared ground reference for metrology integrity. |
| RST/NMI/SBWTDIO | Reset, NMI, and JTAG debug I/O | Single-pin multifunction interface for production programming, boundary-scan testing, and secure bootloader entry - critical for field firmware updates. |
| eUSCI_A0–A3, eUSCI_B0–B1 | Universal serial communication interfaces | Configurable UART (optical port), SPI (isolated RS-485 PHY), and I²C (EEPROM/security chip) - enables concurrent multi-protocol smart meter communication. |
Key Features
| Feature | Design Value |
|---|---|
| 7-channel 24-bit SD24_B ADC | Enables simultaneous, synchronized sampling of all three phases plus neutral - eliminates inter-channel timing skew in polyphase energy calculations. |
| Dedicated pulse output pins | Hardware-generated active/reactive energy pulses (e.g., S0/S1) meet metrology calibration standards without CPU intervention or timer resource consumption. |
| Password-protected RTC with tamper detection | Prevents clock rollback attacks and detects physical enclosure breaches - required for revenue-grade time-of-use billing compliance. |
| Temperature-compensated energy measurement | On-chip temperature sensor and calibration coefficients correct ADC gain/offset drift across –40°C to +85°C - maintains accuracy without external compensation circuitry. |
| 40–70 Hz line frequency range with single calibration | Eliminates need for region-specific firmware variants; supports global deployment across 50 Hz (EU/Asia) and 60 Hz (Americas) grids using identical hardware and calibration data. |
| Flexible power supply with auto-switching | Seamlessly transitions between AC mains, supercapacitor, and coin-cell backup - ensures continuous RTC and SRAM retention during grid outages. |
Applications
| 3-Phase Electronic Watt-Hour Meter | Smart Grid Distribution Transformer Monitor |
|---|---|
|
Use Scenario: Revenue-grade electricity metering for commercial/industrial 3-phase 4-wire installations with tariff-based billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time RMS, fundamental/ harmonic power, phase angle, and kWh/kvarh accumulation. Use Value: Achieves ANSI C12.20 Class 0.1 accuracy with <0.1% error over 2000:1 dynamic range - eliminates need for external precision op-amps or calibration resistors. |
Use Scenario: Real-time monitoring of transformer loading, unbalance, harmonics, and thermal derating at distribution substations. IC Role / Device Role / Timing Role: High-resolution sensor fusion hub aggregating voltage/current from multiple CTs and PTs, with timestamped waveform capture. Use Value: Seven independent 24-bit ADCs enable simultaneous sampling of all phases and neutral - captures true 4-wire unbalance and zero-sequence current without multiplexing artifacts. |
| AMI Endpoint with Dual-Port Communication | Energy Monitoring Gateway for Building Automation |
|
Use Scenario: Advanced Metering Infrastructure (AMI) node transmitting usage data via RF mesh (e.g., Wi-SUN) and PLC backhaul simultaneously. IC Role / Device Role / Timing Role: Secure data concentrator with AES-128 encryption, RTC-synchronized event logging, and dual eUSCI interfaces for concurrent PHY control. Use Value: Hardware AES engine offloads encryption from CPU - preserves 25-MHz processing headroom for real-time harmonic analysis and firmware-over-the-air validation. |
Use Scenario: Submetering gateway aggregating energy data from HVAC, lighting, and plug loads in commercial buildings for demand response and LEED reporting. IC Role / Device Role / Timing Role: Low-power edge processor executing IEC 61850-9-3 PTP time synchronization, Modbus TCP bridging, and local anomaly detection. Use Value: LPM3.5 mode draws only 0.34 µA with RTC active - enables 10+ year battery life in wireless gateways deployed in inaccessible ceiling spaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6779AIPEU | Same 128-pin LQFP package, identical peripheral set, but with 32KB RAM (vs. 16KB) and full 512KB flash retention - no functional difference in metrology path. | Preferred where extended firmware features (e.g., DLMS/COSEM stack, OTA update buffers) require additional RAM headroom. | Select when future-proofing for feature-rich firmware or larger cryptographic key storage without changing PCB layout. |
| MSP430F6768AIPEU | Same 512KB flash/16KB RAM, but only six 24-bit SD24_B ADC channels - lacks one sigma-delta modulator channel versus MSP430F6778AIPEU. | Suitable for 3-phase 3-wire (no neutral current measurement) or reduced-channel industrial monitors where neutral monitoring is omitted. | Choose for cost-sensitive 3-wire deployments where neutral current sensing is not required - same footprint and software compatibility. |
Compared with MSP430F6779AIPEU, the MSP430F6778AIPEU trades 16KB RAM for lower BOM cost while retaining identical metrology accuracy and ADC count; versus MSP430F6768AIPEU, it adds a seventh SD24_B channel essential for neutral current measurement in 4-wire star configurations.
Availability
MSP430F6778AIPEU is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, utility distribution monitoring systems, and building energy gateways requiring stable component supply, long-term lifecycle support, and metrology-grade traceability.
Supply support for MSP430F6778AIPEU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies - with decades of leadership in metrology ICs and smart grid infrastructure.
The MSP430F6778AIPEU belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for revenue-grade energy measurement in utility, industrial, and commercial metering applications - emphasizing accuracy, security, and ultra-low-power operation.
FAQ
What is the maximum number of independent analog input channels supported by the MSP430F6778AIPEU?
The MSP430F6778AIPEU supports seven independent 24-bit sigma-delta ADC channels (SD24_B) with dedicated differential input pins (SD0P0/SD0N0 through SD6P0/SD6N0). This enables simultaneous sampling of three phase voltages, three phase currents, and neutral current - fulfilling full 3-phase 4-wire metrology requirements without multiplexing or external ADCs. Each channel includes programmable gain and digital phase correction.
Does the MSP430F6778AIPEU support hardware-accelerated encryption for secure firmware updates?
Yes, the MSP430F6778AIPEU integrates a dedicated hardware AES-128 encryption module that operates independently of the CPU. This allows secure boot verification, encrypted OTA firmware updates, and protected communication with external security elements - all without consuming CPU cycles or increasing code size. The module supports ECB, CBC, and CTR modes and is accessible via DMA for high-throughput data protection.
How does the MSP430F6778AIPEU handle power loss during AC mains failure?
The MSP430F6778AIPEU features automatic power supply switching between AC-derived rails and backup sources (e.g., supercapacitor or coin cell). In LPM3.5 mode, it draws just 0.34 µA while maintaining RTC operation and SRAM retention. Its LCD driver continues functioning at 3 µA - sustaining display visibility during outages. Critical metrology registers and RTC state remain intact, enabling seamless resumption of time-stamped measurements upon mains restoration.
What metrology standards does the MSP430F6778AIPEU comply with out of the box?
The MSP430F6778AIPEU is architected to meet or exceed ANSI C12.20 (2015) Class 0.1 accuracy and IEC 62053-22 Class 0.5S requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant computation, temperature-compensated calibration, and digital phase correction for CTs are validated against these standards. Full compliance requires proper external sensor selection and board-level layout per TI's EVM430-F6779 reference design.
Can the MSP430F6778AIPEU drive a 320-segment LCD directly without external bias components?
Yes, the MSP430F6778AIPEU includes an integrated LCD_C controller capable of driving up to 320 segments (8 commons × 40 segments) with programmable contrast, internal charge pump, and static/multiplexed operation. It requires only external capacitors on LCDCAP and LCDREF pins - no external voltage dividers, op-amps, or bias generators. The controller supports blinking, partial blanking, and low-power LPM3 operation at 3 µA, making it ideal for utility meter glass displays.
MSP430F6778AIPEU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 128-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT, 7x24b Sigma Delta Converter
- Number of I/O:
- 90
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F6778AIPEU FAQ
1.How can I place an order for MSP430F6778AIPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6778AIPEU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430F6778AIPEU reliable?
The price and inventory of MSP430F6778AIPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6778AIPEU is usually 5 days.
3.What payment methods are accepted for MSP430F6778AIPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6778AIPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6778AIPEU?
MSP430F6778AIPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6778AIPEU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430F6778AIPEU?
For technical support, including MSP430F6778AIPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6778AIPEU requirements.
6.How does Aetrix verify that MSP430F6778AIPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F6778AIPEU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430F6778AIPEU meets industry standards.
7.What is the process for return or replacement of MSP430F6778AIPEU?
All MSP430F6778AIPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6778AIPEU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430F6778AIPEU part is unused and in its original packaging.
Return procedure for MSP430F6778AIPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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