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Texas Instruments MSP430FR69791IPZR
- Part No.:
- MSP430FR69791IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430FR69791IPZR.pdf
- Description:
- IC MCU 16BIT 128KB FRAM 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
MSP430FR69791IPZR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller featuring 128KB nonvolatile FRAM, 2KB RAM, 12-bit ADC with 16 external inputs, integrated LCD driver supporting up to 320 segments, and dual eUSCI modules (UART/IrDA/SPI + I²C/SPI). It operates from 1.8 V to 3.6 V and targets battery-powered utility metering and data logging.
For engineers reviewing the MSP430FR69791IPZR datasheet, MSP430FR69791IPZR pinout, MSP430FR69791IPZR application, or MSP430FR69791IPZR equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), RTC current in LPM3.5 (0.35 µA), capacitive touch I/O support on all ports P1–P10/PJ, AES256 security coprocessor, and HFXIN/HFXOUT pin availability for high-frequency crystal operation.
Technical Context
The MSP430FR69791IPZR implements the MSP430 CPUXV2 core with 16 general-purpose registers and supports seven low-power modes optimized for energy-constrained applications. Its clock system integrates DCO (10 factory-trimmed frequencies), LFXT (32-kHz crystal), and HFXT (high-frequency crystal) sources - with HFXT fully enabled on this variant, unlike MSP430FR692x devices.
Peripherals include three 16-bit Timer_A modules (TA0/TA1/TA3), one 16-bit Timer_B (TB0), 32-bit hardware multiplier, three-channel DMA, CRC16/CRC32 engines, and dual eUSCI_A (UART/IrDA/SPI) and eUSCI_B (I²C/SPI) interfaces. The device features full JTAG and Spy-Bi-Wire debug support plus hardware UART and I²C bootloader (BSL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit MSP430 CPUXV2 with 16 registers; enables deterministic real-time control at ≤16 MHz clock speed. |
| Nonvolatile Memory | 128KB FRAM with 10¹⁵ write endurance and 125 ns/word write speed - eliminates flash wear-out concerns in frequent-data-update systems. |
| ADC | 12-bit SAR ADC with internal reference, sample-and-hold, and up to 16 external input channels - supports precision sensor interfacing without external reference components. |
| RTC Current (LPM3.5) | 0.35 µA typical - enables multi-year battery life in always-on timekeeping and wake-up applications like heat cost allocators. |
| Supply Voltage Range | 1.8 V to 3.6 V - accommodates single-cell Li-ion, two-cell alkaline, or regulated 3.3 V rails while maintaining full peripheral functionality. |
| LCD Driver | Integrated LCD_C module driving up to 320 segments with static or 2–8 multiplexing - reduces BOM count and PCB space in meter displays. |
| AES Engine | Hardware-accelerated 128/256-bit AES encryption/decryption - enables secure firmware updates and encrypted data storage without CPU overhead. |
Pinout & Package
Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, with exposed thermal pad (not electrically connected). Pinout validated per TI SLAS797C Rev. August 2018, Figure 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0–P1.7 | General-purpose I/O with capacitive touch, timer, USCI, and analog functions | Supports simultaneous GPIO, CTP, ADC input, and USCI peripheral mapping - enables flexible board layout and shared signal routing. |
| P6.3–P6.6, P2.4–P2.7 | LCD common outputs (COM0–COM7) | Drive LCD backplane lines directly - eliminates need for external LCD bias IC in 8-mux segment displays. |
| PJ.4 / PJ.5 | LFXIN / LFXOUT | Connect 32.768 kHz crystal for RTC timing; LFXOUT provides buffered output for cascading clocks to other peripherals. |
| PJ.6 / PJ.7 | HFXIN / HFXOUT | Enable high-frequency crystal oscillator (HFXT) for precise system clock generation - required for USB-capable or high-speed serial timing. |
| RST/NMI/SBWTDIO | Reset, non-maskable interrupt, and Spy-Bi-Wire debug I/O | Single-pin 2-wire debug interface reduces test point count and simplifies programming in space-constrained designs. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 128KB unified memory space enabling atomic writes, zero-wait-state execution, and elimination of flash erase cycles during firmware updates. |
| Capacitive Touch I/O | All P1–P10 and PJ pins support CTP without external components - reduces bill-of-materials and enables robust front-panel user interfaces in meters. |
| Ultra-Low-Power Modes | LPM3.5 (RTC active): 0.35 µA; LPM4.5 (shutdown): 0.02 µA - extends battery life to >10 years in water/heat meter deployments. |
| Dual eUSCI Modules | eUSCI_A0/A1 support UART (with auto-baud detection), IrDA, SPI; eUSCI_B0/B1 support I²C (multi-slave addressing) and SPI - enables concurrent wired communication protocols. |
| Hardware Security | Dedicated AES256 coprocessor + true random number seed generator - meets IEC 62443 and EN 13757-3 requirements for secure metrology firmware and data integrity. |
Applications
| Water Metering | Heat Cost Allocation |
|---|---|
|
Use Scenario: Battery-powered ultrasonic or mechanical water meter with hourly flow logging and tamper detection. IC Role / Device Role / Timing Role: Main controller executing flow calculation, FRAM-based data logging, RTC-timed wake-up, and LCD display update. Use Value: 128KB FRAM stores >10 years of hourly consumption data; 0.35 µA RTC current ensures 15+ year CR2032 battery life. |
Use Scenario: Apartment-level heat cost allocator with temperature sensing, valve control, and local display. IC Role / Device Role / Timing Role: Real-time metering engine managing dual-sensor ADC reads, PWM valve drive, and segmented LCD rendering. Use Value: Integrated LCD_C driver supports 320-segment display without external bias IC; capacitive touch enables sealed keypad interface. |
| Portable Medical Logging | Data Acquisition Node |
|
Use Scenario: Handheld blood glucose or ECG logger requiring secure data storage and Bluetooth LE interface. IC Role / Device Role / Timing Role: Secure data acquisition node performing ADC sampling, AES-encrypted FRAM storage, and UART-to-BLE bridge. Use Value: Hardware AES256 enables HIPAA-compliant encryption; FRAM write speed (125 ns/word) captures rapid sensor bursts without data loss. |
Use Scenario: Industrial environmental monitor logging temperature, humidity, and CO₂ via I²C sensors and transmitting via UART to gateway. IC Role / Device Role / Timing Role: Sensor hub aggregating multi-channel ADC and I²C data, applying CRC32 checksums, and buffering in FRAM before transmission. Use Value: Dual eUSCI_B modules allow simultaneous I²C sensor reads and UART telemetry - no software arbitration or bus contention. |
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 |
|---|---|---|---|
| MSP430FR6979IPZ | Identical FRAM (128KB), RAM (2KB), peripherals, and pinout; differs only in BSL type (UART vs. I²C) and marking. | Same metering and logging use cases; UART BSL preferred where host MCU uses UART for field firmware updates. | Select MSP430FR6979IPZ when UART-based bootloader integration is required and I²C BSL is not needed. |
| MSP430FR6977IPZR | 64KB FRAM (half capacity), otherwise identical package, peripherals, and power specs; shares same 100-pin LQFP footprint. | Suitable for simpler meters with lower data retention requirements (e.g., monthly billing only); reduces FRAM cost by ~30%. | Choose MSP430FR6977IPZR when application data volume fits within 64KB and cost optimization is critical. |
Compared with MSP430FR6979IPZ and MSP430FR6977IPZR, the MSP430FR69791IPZR offers I²C BSL compatibility for secure host-controlled updates and full 128KB FRAM headroom for extended logging - making it optimal for next-generation smart utility endpoints requiring both security and longevity.
Availability
MSP430FR69791IPZR is available at Aetrix Electronics and suitable for water metering, heat cost allocation, and portable medical logging requiring stable component supply across 10+ year product lifecycles.
Supply support for MSP430FR69791IPZR 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 delivering analog and embedded processing solutions, with over 50 years of innovation in low-power microcontrollers and precision analog technology.
The MSP430 ULP FRAM portfolio targets energy-constrained applications such as utility metering and portable instrumentation, combining ferroelectric memory with ultra-low-power architecture to eliminate flash limitations in battery-operated systems.
FAQ
What is the maximum operating frequency of the MSP430FR69791IPZR?
The MSP430FR69791IPZR supports a maximum system clock frequency of 16 MHz using its factory-trimmed DCO or external HFXT crystal. This allows real-time processing of sensor data and LCD updates while maintaining sub-100 µA/MHz active-mode current efficiency - critical for extending battery life in the MSP430FR69791IPZR's target applications.
Does the MSP430FR69791IPZR support hardware AES encryption?
Yes, the MSP430FR69791IPZR integrates a dedicated 128/256-bit AES security coprocessor that performs encryption and decryption independently of the CPU. This enables secure firmware updates and protected data storage in the MSP430FR69791IPZR without compromising real-time performance or increasing power consumption.
How many LCD segments can the MSP430FR69791IPZR drive?
The MSP430FR69791IPZR's integrated LCD_C module supports up to 320 segments with static, 2-, 3-, 4-, 6-, or 8-mux configurations. This capability eliminates external LCD bias circuitry and reduces component count in utility meter displays - a key design advantage of the MSP430FR69791IPZR over standard MCU alternatives.
What is the standby current consumption of the MSP430FR69791IPZR in LPM3 mode?
In LPM3 (standby with VLO), the MSP430FR69791IPZR consumes 0.4 µA typical. When combined with its RTC in LPM3.5 mode (0.35 µA), this enables decade-long operation on coin-cell batteries - a verified specification confirmed in TI's SLAS797C datasheet for the MSP430FR69791IPZR.
Is the MSP430FR69791IPZR pin-compatible with other devices in the MSP430FR697x family?
Yes, the MSP430FR69791IPZR in the 100-pin LQFP (PZ) package shares identical pinout and electrical characteristics with MSP430FR6979IPZ and MSP430FR6977IPZR. This allows direct PCB reuse across variants - for example, upgrading from MSP430FR6977IPZR to MSP430FR69791IPZR requires no layout changes.
MSP430FR69791IPZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 128KB (128K 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 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR69791IPZR FAQ
1.How can I place an order for MSP430FR69791IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR69791IPZR 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 MSP430FR69791IPZR reliable?
The price and inventory of MSP430FR69791IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR69791IPZR is usually 5 days.
3.What payment methods are accepted for MSP430FR69791IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR69791IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR69791IPZR?
MSP430FR69791IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR69791IPZR 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 MSP430FR69791IPZR?
For technical support, including MSP430FR69791IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR69791IPZR requirements.
6.How does Aetrix verify that MSP430FR69791IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430FR69791IPZR 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 MSP430FR69791IPZR meets industry standards.
7.What is the process for return or replacement of MSP430FR69791IPZR?
All MSP430FR69791IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR69791IPZR, 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 MSP430FR69791IPZR part is unused and in its original packaging.
Return procedure for MSP430FR69791IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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