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Texas Instruments MSP430FR6977IPNR
- Part No.:
- MSP430FR6977IPNR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
MSP430FR6977IPNR.pdf
- Description:
- IC MCU 16BIT 64KB FRAM 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
MSP430FR6977IPNR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 64KB ferroelectric RAM (FRAM), 2KB SRAM, integrated LCD driver supporting up to 320 segments, 12-bit ADC with 16 external inputs, and dual eUSCI modules supporting UART, IrDA, SPI, and I²C. It operates from 1.8 V to 3.6 V and targets battery-powered metering applications requiring long-term data retention and real-time clock functionality.
For engineers reviewing the MSP430FR6977IPNR datasheet, MSP430FR6977IPNR pinout, MSP430FR6977IPNR application, or MSP430FR6977IPNR equivalent, key selection criteria include FRAM endurance (1015 write cycles), LPM3.5 RTC current (0.35 µA typical), 80-pin LQFP package compatibility, and hardware AES-256 encryption support for secure firmware updates in utility metering systems.
Technical Context
The MSP430FR6977IPNR implements the MSP430 CPUXV2 core with 16 general-purpose registers and executes instructions at up to 16 MHz. Its power architecture supports seven low-power modes, including LPM3.5 (RTC active) and LPM4.5 (shutdown), with supply current as low as 0.02 µA in deep sleep.
Peripherals include three 16-bit Timer_A modules (TA0, TA1, TA3), one 16-bit Timer_B (TB0) with seven capture/compare registers, 32-bit hardware multiplier, three-channel DMA, and dual eUSCI_A (UART/IrDA/SPI) and eUSCI_B (I²C/SPI) interfaces - all operating under unified FRAM memory space without separate program/data address spaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit MSP430 CPUXV2 with 16 registers; enables deterministic real-time control and low-latency interrupt response. |
| FRAM Capacity | 64 KB nonvolatile memory; supports unlimited read/write cycles (1015 endurance) and 125 ns per word writes - eliminates flash wear-out concerns in frequent logging. |
| Supply Voltage Range | 1.8 V to 3.6 V; compatible with single-cell Li-ion, two-cell alkaline, or regulated 3.3 V rails without external level shifting. |
| LPM3.5 Current | 0.35 µA typical with RTC running; enables >10-year battery life in water/heat meters using coin-cell batteries. |
| ADC Resolution | 12-bit SAR ADC with internal reference and sample-and-hold; supports up to 16 external analog inputs for sensor interfacing in metering front-ends. |
| LCD Driver | Integrated LCD_C module driving up to 320 segments with static or 2–8 multiplexing; reduces BOM cost by eliminating external display controllers. |
| Crypto Engine | Hardware AES-256 coprocessor with true random number seed; accelerates secure boot and OTA firmware authentication without CPU overhead. |
Pinout & Package
The MSP430FR6977IPNR is housed in an 80-pin LQFP (PN) package measuring 12 mm × 12 mm with exposed thermal pad (not electrically connected). Pin assignments are validated per TI SLAS797C Rev. August 2018, Section 4.1 (Figure 4-2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0 / A0 / C0 / VREF− | Analog input / reference ground | Provides dedicated negative reference for ADC and comparator; supports ratiometric sensor measurements. |
| P1.1 / A1 / C1 / VREF+ | Analog input / reference voltage | Accepts external or internal VREF+ source; enables precise 12-bit ADC conversions independent of supply variation. |
| P6.3 / COM0 | LCD backplane output | Drives first common electrode of multiplexed LCD; supports up to 8-common configurations for segment reuse. |
| P6.4 / TB0.0 / COM1 | Timer_B output / LCD common | Simultaneously serves as capture/compare channel and second LCD backplane - enables time-synchronized display updates. |
| PJ.4 / LFXIN | Low-frequency crystal input | Connects to 32.768 kHz tuning-fork crystal for RTC accuracy; supports crystal oscillation without external load capacitors. |
| RST/NMI/SBWTDIO | Reset / NMI / JTAG debug | Multi-function pin enabling device reset, non-maskable interrupt, and Spy-Bi-Wire programming/debug via single-wire interface. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 64 KB unified memory space enabling simultaneous code execution and data logging without erase delays or wear leveling. |
| Real-Time Clock (RTC_C) | Calendar mode with alarm and battery-backed operation in LPM3.5; consumes only 0.35 µA while maintaining accurate timekeeping. |
| Capacitive Touch I/O | All P1–P10 and PJ pins support touch sensing without external components - enables button/slider UI on meter housings with minimal PCB area. |
| eUSCI_A0/A1 and eUSCI_B0/B1 | Dual UART/IrDA/SPI and dual I²C/SPI interfaces allow concurrent communication with metrology sensors, RF modules, and host MCUs. |
| EnergyTrace++™ Support | On-chip power profiling enables real-time current measurement down to sub-µA levels - critical for optimizing battery lifetime in field-deployed meters. |
Applications
| Water Meters | Heat Cost Allocators |
|---|---|
Use Scenario: Ultrasonic or mechanical flow measurement with hourly consumption logging and tamper detection. IC Role / Device Role: Primary system controller managing sensor acquisition, FRAM-based data storage, LCD display, and optical/RF pulse output. Use Value: 64KB FRAM retains 10+ years of hourly logs at 0.35 µA RTC current; AES-256 secures firmware against unauthorized reprogramming. | Use Scenario: Thermal energy allocation in multi-tenant buildings using temperature differential and flow time integration. IC Role / Device Role: Integrated metrology processor handling dual-sensor ADC sampling, real-time integration, and LCD-driven user interface. Use Value: 12-bit ADC with internal reference ensures ±0.5% measurement accuracy across temperature; LCD_C drives 240-segment display without external drivers. |
| Portable Medical Meters | Data Logging |
Use Scenario: Battery-powered glucose or blood pressure monitors requiring FDA-compliant data integrity and audit trails. IC Role / Device Role: Secure data acquisition node with timestamped sensor reads, encrypted storage, and USB/I²C host interface. Use Value: Hardware AES-256 encrypts stored readings; FRAM's 1015 write endurance guarantees reliable logging over 100,000+ measurements. | Use Scenario: Environmental monitoring nodes capturing temperature, humidity, and light levels at 15-minute intervals for industrial facilities. IC Role / Device Role: Autonomous logger with RTC-triggered wake-up, sensor polling, FRAM buffering, and periodic wireless upload. Use Value: LPM4.5 shutdown current of 0.02 µA extends CR2032 battery life beyond 5 years; CRC32 validates log integrity after power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power FRAM microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR6979IPN | 128KB FRAM, same 80-pin LQFP package, identical peripheral set and pinout. | Supports larger firmware images and extended data buffers; suitable when >64KB nonvolatile storage is required. | Select MSP430FR6979IPN if future firmware growth or extended logging duration necessitates double FRAM capacity. |
| MSP430FR6927IRGC | 64KB FRAM, 64-pin VQFN (9 mm × 9 mm), no HFX oscillator, reduced I/O count (52 vs. 63), 116-segment LCD support. | Targeted at space-constrained, lower-segment-display applications where HF crystal is unnecessary. | Choose MSP430FR6927IRGC for compact designs with simpler displays and no high-frequency timing requirements. |
Compared with MSP430FR6977IPNR, the MSP430FR6979IPN offers scalable FRAM headroom without layout changes, while the MSP430FR6927IRGC trades package size and HF capability for reduced footprint - both require validation of LCD segment count and crystal configuration in final design.
Availability
MSP430FR6977IPNR is available at Aetrix Electronics and suitable for water meters, heat cost allocators, and portable medical meters requiring stable component supply, long-term FRAM reliability, and certified low-power operation.
Supply support for MSP430FR6977IPNR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.
The MSP430 ULP FRAM portfolio was designed specifically for energy-constrained applications such as utility metering and portable instrumentation, combining FRAM endurance with seven optimized low-power modes to maximize battery life.
FAQ
What is the maximum operating frequency of the MSP430FR6977IPNR?
The MSP430FR6977IPNR supports a maximum system clock frequency of 16 MHz using its factory-trimmed DCO or external HFXT oscillator. This allows deterministic real-time processing for metrology algorithms while maintaining ultra-low-power operation in active mode at approximately 100 µA/MHz.
Does the MSP430FR6977IPNR support hardware encryption?
Yes, the MSP430FR6977IPNR integrates a dedicated AES-256 security coprocessor with true random number generation capability. This enables fast, low-power encryption and decryption of firmware images and logged data - essential for compliance with utility industry security standards.
How many LCD segments can the MSP430FR6977IPNR drive?
The MSP430FR6977IPNR features the LCD_C module capable of driving up to 320 segments using static or 2–8 multiplexing configurations. This supports full-featured numeric and alphanumeric displays commonly used in water and heat meters without external display controllers.
What low-power modes are available on the MSP430FR6977IPNR?
The MSP430FR6977IPNR provides seven low-power modes: LPM0–LPM4, plus LPM3.5 (RTC active) and LPM4.5 (shutdown). In LPM3.5, it draws just 0.35 µA while maintaining calendar time; in LPM4.5, current drops to 0.02 µA - enabling decade-long battery operation in metering applications.
Is the MSP430FR6977IPNR pin-compatible with other devices in the MSP430FR69xx family?
Yes, the MSP430FR6977IPNR in the 80-pin LQFP (PN) package shares identical pinout and electrical characteristics with the MSP430FR6979IPN and MSP430FR69791IPN. This allows direct substitution for FRAM capacity upgrades without PCB redesign.
MSP430FR6977IPNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 63
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 12x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR6977IPNR FAQ
1.How can I place an order for MSP430FR6977IPNR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR6977IPNR 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 MSP430FR6977IPNR reliable?
The price and inventory of MSP430FR6977IPNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR6977IPNR is usually 5 days.
3.What payment methods are accepted for MSP430FR6977IPNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR6977IPNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR6977IPNR?
MSP430FR6977IPNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR6977IPNR 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 MSP430FR6977IPNR?
For technical support, including MSP430FR6977IPNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR6977IPNR requirements.
6.How does Aetrix verify that MSP430FR6977IPNR is sourced from the original manufacturer or authorized distributors?
All MSP430FR6977IPNR 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 MSP430FR6977IPNR meets industry standards.
7.What is the process for return or replacement of MSP430FR6977IPNR?
All MSP430FR6977IPNR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR6977IPNR, 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 MSP430FR6977IPNR part is unused and in its original packaging.
Return procedure for MSP430FR6977IPNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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