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Texas Instruments MSP430FR68791IPZR
- Part No.:
- MSP430FR68791IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430FR68791IPZR.pdf
- Description:
- IC MCU 16BIT 128KB FRAM 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
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Product details
Overview
MSP430FR68791IPZR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 128KB nonvolatile memory, 2KB RAM, integrated 12-bit ADC (16-channel), LCD controller (up to 320 segments), and dual eUSCI modules supporting UART, 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 low active/standby current.
For engineers reviewing the MSP430FR68791IPZR datasheet, MSP430FR68791IPZR pinout, MSP430FR68791IPZR application, or MSP430FR68791IPZR equivalent, this page delivers verified functional specifications, validated package mapping (100-pin LQFP), confirmed low-power mode currents (LPM3.5: 0.35 µA), real-time clock integration, and precise peripheral allocation for water/heat meter design.
Technical Context
The MSP430FR68791IPZR implements the MSP430 CPUXV2 core with FRAM-based unified memory architecture, enabling simultaneous read/write without erase cycles and 10¹⁵ write endurance. Its power management includes seven low-power modes, with LPM3.5 (RTC active) drawing only 0.35 µA and LPM4.5 (shutdown) consuming 0.02 µA - critical for multi-year battery life in utility meters.
Peripherals are tightly coupled to low-power operation: the 12-bit ADC supports internal reference and sample-and-hold; the LCD_C module drives up to 320 segments with programmable contrast; and dual eUSCI_A/B modules support hardware UART/I²C bootloaders - with I²C BSL enabled on P1.6/P1.7 per device variant specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit MSP430 CPUXV2, up to 16-MHz operation - enables deterministic real-time control with minimal code footprint. |
| Nonvolatile Memory | 128KB FRAM - provides instant-write, radiation-resistant, 10¹⁵-cycle endurance storage for firmware and logging without flash wear-out. |
| RAM | 2KB SRAM - sufficient for stack, variables, and DMA buffers during active sensor acquisition or communication bursts. |
| ADC | 12-bit ADC12_B with 16 external inputs and internal reference - supports high-accuracy analog sensing in metering transducers. |
| LCD Driver | LCD_C module driving up to 320 segments with static/2–8 mux - eliminates external display controllers in heat/water meters. |
| Low-Power Modes | LPM3.5: 0.35 µA (RTC active); LPM4.5: 0.02 µA (shutdown) - enables >10-year battery life in sealed meter enclosures. |
| eUSCI Peripherals | eUSCI_A0/A1 (UART/SPI/IrDA); eUSCI_B0/B1 (I²C/SPI); I²C BSL on P1.6/P1.7 - enables field firmware updates via two-wire interface. |
Pinout & Package
Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch. Pinout validated per TI SLASE33C Rev. C (August 2018), Figure 4-1 and Table 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0–P1.7 | General-purpose I/O with timer/USCI/LCD functions | Support capacitive touch sensing, UART/SPI/I²C communication, and LCD segment drive - no external components required. |
| P6.0–P6.7 | LCD common outputs (COM0–COM7) and analog voltage references | Directly drive up to 8 LCD backplanes; R13/R23/R33 pins configure regulated LCD bias voltages for stable contrast. |
| PJ.4/PJ.5 | LFXIN/LFXOUT | Connect 32.768-kHz crystal for RTC accuracy ±20 ppm - essential for time-of-use billing in heat cost allocators. |
| PJ.6/PJ.7 | HFXIN/HFXOUT | Support high-frequency crystal (4–24 MHz) for precise system clock when HFXT is selected over DCO. |
| RST/NMI/SBWTDIO | Reset / NMI input / Spy-Bi-Wire data I/O | Enables single-wire debugging and programming; reset threshold configurable via SVS for brownout immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 128KB unified memory with 125 ns/word write speed and 10¹⁵ write cycles - eliminates flash erase delays and wear leveling overhead in data loggers. |
| Ultra-Low-Power RTC | 0.35 µA typical in LPM3.5 with calendar/alarm - enables timestamped event logging and wake-on-interval for periodic sensor reads. |
| Integrated LCD Controller | Drives up to 320 segments with contrast control and static/2–8 multiplexing - reduces BOM by removing external LCD drivers in utility meters. |
| Dual eUSCI Modules | eUSCI_A0/A1 (UART/SPI/IrDA); eUSCI_B0/B1 (I²C/SPI); I²C BSL on P1.6/P1.7 - supports secure, two-wire field firmware updates without UART pins. |
| Capacitive Touch I/O | All P1–P10 and PJ pins support CSD without external components - enables sealed front-panel user interfaces in water/heat meters. |
Applications
| Water Metering | Heat Cost Allocation |
|---|---|
|
Use Scenario: Ultrasonic or mechanical flow measurement with pulse counting, temperature compensation, and tamper detection. IC Role / Device Role / Timing Role: Main system controller executing metrology algorithms, managing FRAM-based consumption logs, and driving LCD display. Use Value: 128KB FRAM stores 10+ years of hourly consumption data; LPM3.5 RTC enables accurate time-stamped events without external clock IC. |
Use Scenario: Room-level thermal energy distribution monitoring using radiator-mounted sensors and wireless reporting. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating temperature, flow, and valve position data; RTC-synchronized data upload. Use Value: Integrated 12-bit ADC interfaces directly to thermistors and RTDs; LCD_C drives local 4-digit display without external driver IC. |
| Portable Medical Meters | Data Logging |
|
Use Scenario: Battery-powered blood glucose or inhaler usage trackers requiring FDA-compliant audit trails. IC Role / Device Role / Timing Role: Secure data acquisition node with cryptographic seed generation and tamper-evident logging. Use Value: True random number seed supports secure key derivation; FRAM ensures atomic write integrity during power loss. |
Use Scenario: Environmental monitoring (temperature/humidity/pressure) in industrial or agricultural settings. IC Role / Device Role / Timing Role: Autonomous logger capturing sensor data at scheduled intervals and storing in nonvolatile memory. Use Value: 0.02 µA LPM4.5 shutdown current extends battery life to >15 years; CRC32 validates log integrity across power cycles. |
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 |
|---|---|---|---|
| MSP430FR6879IPZR | UART BSL; identical FRAM/RAM/peripherals; same 100-pin LQFP package | Requires UART interface for firmware updates; compatible with existing UART-based bootloader infrastructure | Select when UART-based field updates are already deployed and no I²C bus is available. |
| MSP430FR6877IPZR | 64KB FRAM (vs. 128KB); otherwise identical peripherals, package, and low-power specs | Suitable for simpler meters with shorter log history or reduced feature set (e.g., no advanced diagnostics) | Choose for cost-sensitive designs where 64KB FRAM suffices and full 128KB headroom is unnecessary. |
Compared with MSP430FR6879IPZR and MSP430FR6877IPZR, the MSP430FR68791IPZR uniquely supports I²C BSL on dedicated pins (P1.6/P1.7), enabling secure two-wire firmware updates in space-constrained meters where UART pins are allocated to sensor interfaces.
Availability
MSP430FR68791IPZR is available at Aetrix Electronics and suitable for water metering, heat cost allocation, and portable medical metering requiring stable component supply, long-term FRAM data retention, and certified low-power operation.
Supply support for MSP430FR68791IPZR 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 for industrial, automotive, and consumer applications.
The MSP430 ULP FRAM portfolio targets energy-constrained applications like utility metering and portable instrumentation, combining FRAM endurance with sub-µA low-power modes and integrated analog peripherals.
FAQ
What distinguishes MSP430FR68791IPZR from MSP430FR6879IPZR?
The MSP430FR68791IPZR features an I²C-based hardware bootloader (BSL) assigned to P1.6 (BSLSDA) and P1.7 (BSLSCL), whereas MSP430FR6879IPZR uses UART BSL on P2.0/P2.1. Both share identical FRAM (128KB), RAM (2KB), peripherals, and 100-pin LQFP packaging. The BSL interface difference dictates field update infrastructure compatibility - MSP430FR68791IPZR is preferred when I²C is already routed to the MCU in the PCB layout.
Does MSP430FR68791IPZR support capacitive touch sensing without external components?
Yes, the MSP430FR68791IPZR supports capacitive touch sensing on all P1–P10 and PJ port pins using its integrated CapTIvate™-compatible CSD module. No external RC networks or dedicated touch controller ICs are required - enabling sealed, waterproof front-panel interfaces in water meters and heat cost allocators.
What is the maximum LCD segment count supported by MSP430FR68791IPZR?
The MSP430FR68791IPZR supports up to 320 LCD segments via its LCD_C module, configurable in static, 2-, 3-, 4-, 6-, or 8-mux modes. This capability allows direct drive of multi-digit numeric displays and status icons in utility meters without external LCD drivers or segment expansion ICs.
How does the FRAM memory in MSP430FR68791IPZR improve data logging reliability?
The MSP430FR68791IPZR's 128KB FRAM enables true instant-write operation with no erase latency and 10¹⁵ write cycles - ensuring atomic, power-fail-safe logging of consumption data. Unlike flash-based MCUs, it eliminates wear leveling complexity and guarantees data integrity during unexpected power loss in battery-operated meters.
What low-power mode achieves the lowest current draw with RTC active on MSP430FR68791IPZR?
LPM3.5 achieves 0.35 µA typical current draw with the real-time clock (RTC_C) running from the 32-kHz crystal (LFXIN/LFXOUT), calendar and alarm functions enabled, and CPU halted. This mode is optimal for time-triggered wakeups in water/heat meters where timestamped event logging is required between sensor reads.
MSP430FR68791IPZR 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:
- 83
- 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:
MSP430FR68791IPZR FAQ
1.How can I place an order for MSP430FR68791IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR68791IPZR 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 MSP430FR68791IPZR reliable?
The price and inventory of MSP430FR68791IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR68791IPZR is usually 5 days.
3.What payment methods are accepted for MSP430FR68791IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR68791IPZR transactions.
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4.How is shipping managed for MSP430FR68791IPZR?
MSP430FR68791IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR68791IPZR 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 MSP430FR68791IPZR?
For technical support, including MSP430FR68791IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR68791IPZR requirements.
6.How does Aetrix verify that MSP430FR68791IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430FR68791IPZR 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 MSP430FR68791IPZR meets industry standards.
7.What is the process for return or replacement of MSP430FR68791IPZR?
All MSP430FR68791IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR68791IPZR, 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 MSP430FR68791IPZR part is unused and in its original packaging.
Return procedure for MSP430FR68791IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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