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Texas Instruments MSP430G2231IRSA16T
- Part No.:
- MSP430G2231IRSA16T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MSP430G2231IRSA16T.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:580
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Product details
Overview
MSP430G2231IRSA16T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 2 kB flash, 128 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, Timer_A2 with two capture/compare registers, and USI supporting SPI/I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes requiring analog acquisition, digital processing, and serial communication.
For engineers reviewing the MSP430G2231IRSA16T datasheet, MSP430G2231IRSA16T pinout, MSP430G2231IRSA16T application, or MSP430G2231IRSA16T equivalent, key selection criteria include its QFN-16 package, 10-bit ADC channel count, Spy-Bi-Wire debug interface, LPM4 current of 0.1 µA, and integrated brownout detector-critical for energy-constrained embedded measurement systems.
Technical Context
The MSP430G2231IRSA16T implements a 16-bit CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its clock system integrates a digitally controlled oscillator (DCO) calibrated to 1 MHz, 8 MHz, 12 MHz, and 16 MHz, plus LF oscillator and 32-kHz crystal support for ACLK.
Peripheral integration includes Timer_A2 for PWM and interval timing, USI for synchronous serial I/O, and ADC10 with sample-and-hold, internal voltage reference, and DMA-capable data transfer controller-enabling autonomous analog sampling without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 62.5-ns instruction cycle at 16 MHz |
| Flash / RAM | 2 kB flash memory (512-byte segments) and 128 B RAM for firmware storage and runtime variables |
| ADC10 Resolution & Speed | 10-bit SAR ADC with 200-ksps sampling rate and autoscan across up to 8 channels |
| Ultra-Low Power Modes | Five power-saving modes including LPM4 (0.1 µA off-mode with RAM retention) |
| Supply Voltage Range | 1.8 V to 3.6 V operation, with 2.2 V minimum required for flash programming |
| Debug Interface | Spy-Bi-Wire (2-wire JTAG) for on-chip emulation and in-system programming |
| Operating Temperature | –40°C to +85°C industrial-grade range suitable for outdoor sensor deployments |
Pinout & Package
Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.4 mm pitch, exposed thermal pad connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pins 15, 16) | Power supply | Primary VCC input pins; must be decoupled locally with 100 nF ceramic capacitor |
| DVSS (Pins 13, 14) | Ground reference | Digital ground return; thermal pad also connects to DVSS for thermal management |
| P1.0/TA0CLK/ACLK/A0 | Multi-function I/O | Timer_A clock input, ACLK output, or ADC channel 0-configurable via port control registers |
| P1.7/SDI/SDA/TDO/TDI | Serial interface / JTAG | USI data input (SPI) or I²C data line; also serves as JTAG test data I/O during debugging |
| RST/NMI/SBWTDIO | Reset & debug I/O | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data line |
| TEST/SBWTCK | Debug clock | Test mode select and Spy-Bi-Wire clock input; required for fuse programming and boundary scan |
| XIN/P2.6/TA0.1 | Clock input / timer output | Crystal oscillator input or Timer_A compare output; shared function requires careful pinmux planning |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ADC10 with internal reference | Eliminates need for external voltage reference IC and reduces BOM cost in sensor signal chains |
| USI supporting SPI and I²C | Enables direct connection to common digital sensors (e.g., temperature, humidity) without external protocol translators |
| Ultra-fast wake-up (<1 µs) | Allows rapid response to external events while maintaining sub-µA sleep current-ideal for duty-cycled sensing |
| Brownout detector | Prevents erratic operation during brownout conditions by asserting reset when VCC drops below threshold |
| Programmable code protection | Security fuse prevents unauthorized read-out of flash contents, protecting firmware IP in production devices |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and light data at 10-second intervals. IC Role / Device Role / Timing Role: Central MCU executing ADC sampling, USI-based sensor polling, low-power scheduling, and RF subsystem wake-up control. Use Value: LPM4 current of 0.1 µA extends coin-cell battery life beyond 5 years; integrated ADC reference eliminates calibration drift in field-deployed units. |
Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: Signal acquisition controller managing dual-channel ADC sampling, LED drive timing via Timer_A PWM, and I²C display interface. Use Value: 200-ksps ADC supports oversampling for noise reduction; 16-bit timer enables precise 760 nm/940 nm LED pulsing with <1 µs jitter. |
| Smart Meter Endpoint | Industrial Condition Monitor |
|
Use Scenario: Sub-metering module measuring AC current via shunt resistor and reporting kWh usage over LoRaWAN. IC Role / Device Role / Timing Role: Analog front-end processor performing RMS calculation, timestamping, and secure firmware updates via USI bootloader. Use Value: Flash memory with segment erase allows safe OTA updates; brownout detector ensures reliable metering during grid voltage sags. |
Use Scenario: Vibration sensor mounted on motor housing capturing acceleration waveforms for predictive maintenance analysis. IC Role / Device Role / Timing Role: Edge-processing node running FFT preprocessing, event-triggered sampling, and SPI flash logging. Use Value: Autoscan ADC captures multi-channel vibration data without CPU overhead; Spy-Bi-Wire enables field firmware patching without removing PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2553IRHA48T | 48-pin QFN, 16 kB flash, 512 B RAM, 8-channel ADC, hardware UART, enhanced USCI | Supports higher peripheral density and UART-based host communication; larger footprint and higher active current | Select when UART connectivity, larger code space, or additional I/O is required-requires PCB redesign due to different package and pinout |
| MSP430FR2111IPW16R | Ferroelectric RAM (FRAM) instead of flash, 1 kB FRAM, 128 B RAM, no ADC, 16-pin TSSOP | Superior write endurance and near-zero write latency; lacks integrated ADC and requires external reference for analog sensing | Choose for high-write-cycle logging applications where ADC is handled externally; not drop-in due to missing ADC and different memory architecture |
Compared with MSP430G2231IRSA16T, the MSP430G2553IRHA48T offers greater memory and UART but increases board area and power; the MSP430FR2111IPW16R trades ADC capability for FRAM endurance and eliminates flash programming delays-making it unsuitable for ADC-centric designs but advantageous for frequent data logging.
Availability
MSP430G2231IRSA16T is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart meter endpoints, and industrial condition monitors requiring stable component supply, long-term lifecycle support, and verified TI authenticity.
Supply support for MSP430G2231IRSA16T 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 microcontroller innovation.
The MSP430G2xx series was designed specifically for ultra-low-power, cost-sensitive embedded measurement applications-emphasizing extended battery life, integrated analog peripherals, and minimal external components.
FAQ
What is the maximum operating frequency of the MSP430G2231IRSA16T?
The MSP430G2231IRSA16T supports a maximum MCLK frequency of 16 MHz at VCC ≥ 2.7 V, with DCO calibration data factory-programmed for 1 MHz, 8 MHz, 12 MHz, and 16 MHz operation. At 1.8 V, the maximum frequency is limited to 6 MHz per the recommended operating conditions. The actual achievable frequency depends on supply voltage and temperature, and must comply with pulse-width requirements for both high and low phases of MCLK.
Does the MSP430G2231IRSA16T include a hardware UART?
No, the MSP430G2231IRSA16T does not include a hardware UART. It features the Universal Serial Interface (USI), which supports SPI and I²C protocols only. UART functionality must be implemented in software using Timer_A and GPIO pins-a common approach in ultra-low-power designs where asynchronous serial is infrequent. For hardware UART, consider the MSP430G2553IRHA48T.
How many ADC input channels does the MSP430G2231IRSA16T support?
The MSP430G2231IRSA16T supports up to 8 analog input channels (A0–A7) through its integrated 10-bit ADC10 module. Channel selection is managed via the ADC10CTL1 register, and autoscan mode allows sequential conversion of multiple channels without CPU intervention. All channels share the same 10-bit resolution and 200-ksps maximum sampling rate.
What debug interface is supported by the MSP430G2231IRSA16T?
The MSP430G2231IRSA16T supports the Spy-Bi-Wire (SBW) interface-a 2-wire subset of JTAG-for on-chip emulation, flash programming, and real-time debugging. It uses the RST/NMI/SBWTDIO and TEST/SBWTCK pins. No external voltage is required for programming, and security fuse programming is performed via the TEST pin using TI's standard fuse-blow procedure.
Is the MSP430G2231IRSA16T pin-compatible with other MSP430G2x31 variants in QFN-16 package?
Yes, the MSP430G2231IRSA16T shares identical pinout and package dimensions with all other MSP430G2x31 family members offered in the 16-pin QFN (RSA) package-including MSP430G2131IRSA16 and MSP430G2221IRSA16. Pin functions are consistent across the family, enabling hardware reuse when migrating between flash/RAM/ADC configurations, provided firmware accounts for peripheral differences.
MSP430G2231IRSA16T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-VQFN Exposed Pad
- Series:
- MSP430G2xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 10
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 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:
MSP430G2231IRSA16T FAQ
1.How can I place an order for MSP430G2231IRSA16T through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2231IRSA16T 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 MSP430G2231IRSA16T reliable?
The price and inventory of MSP430G2231IRSA16T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2231IRSA16T is usually 5 days.
3.What payment methods are accepted for MSP430G2231IRSA16T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2231IRSA16T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2231IRSA16T?
MSP430G2231IRSA16T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2231IRSA16T 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 MSP430G2231IRSA16T?
For technical support, including MSP430G2231IRSA16T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2231IRSA16T requirements.
6.How does Aetrix verify that MSP430G2231IRSA16T is sourced from the original manufacturer or authorized distributors?
All MSP430G2231IRSA16T 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 MSP430G2231IRSA16T meets industry standards.
7.What is the process for return or replacement of MSP430G2231IRSA16T?
All MSP430G2231IRSA16T units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2231IRSA16T, 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 MSP430G2231IRSA16T part is unused and in its original packaging.
Return procedure for MSP430G2231IRSA16T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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