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Texas Instruments MSP430G2231QPW1REP
- Part No.:
- MSP430G2231QPW1REP
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2231QPW1REP.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,690
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Product details
Overview
MSP430G2231QPW1REP from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller with 2 kB flash, 128 B RAM, and integrated 10-bit ADC, USI (SPI/I²C), Timer_A2, and Spy-Bi-Wire debug interface - designed for battery-powered sensor nodes and space-constrained industrial monitoring systems operating from –40°C to 125°C.
For engineers reviewing the MSP430G2231QPW1REP datasheet, MSP430G2231QPW1REP pinout, MSP430G2231QPW1REP application, or MSP430G2231QPW1REP equivalent, this page delivers verified technical context, exact pin functions, low-power mode behavior, real-world use cases, and validated alternative options - all grounded in TI's SLAS862 production data sheet and extended product documentation.
Technical Context
The MSP430G2231QPW1REP implements a 16-bit RISC CPU with constant generators and 16 general-purpose registers, enabling single-cycle instruction execution at up to 16 MHz MCLK. Its clock system integrates a digitally controlled oscillator (DCO), internal LF oscillator, and external 32-kHz crystal support - with DCO calibration data factory-programmed into Flash Segment A.
It features one 8-bit I/O port (P1) and two additional I/O bits on P2, each with individually configurable pull-up/down resistors, edge-selectable interrupts, and peripheral function multiplexing. The USI module supports synchronous SPI and I²C communication without dedicated hardware protocol engines - relying on software-controlled bit-banging or timer-assisted timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 62.5-ns instruction cycle time; register-based execution enables high code efficiency in memory-constrained embedded firmware. |
| Memory | 2 kB flash (512-byte segments), 128 B RAM; supports in-system programming via Spy-Bi-Wire - no external VPP required. |
| ADC | 10-bit SAR ADC with 8-channel autoscan, internal reference, sample-and-hold, and 200-ksps max sampling rate - suitable for direct sensor digitization without external signal conditioning. |
| Low-Power Modes | Five software-selectable modes including LPM4 (0.1 µA at 2.2 V); wake-up from standby in <1 µs via DCO stabilization - critical for duty-cycled sensing. |
| Communication | Universal Serial Interface (USI) supporting both SPI and I²C protocols using shared pins and software-timed bit control - reduces BOM count vs dual dedicated peripherals. |
| Debug Interface | Spy-Bi-Wire (2-wire JTAG subset) with on-chip emulation logic - enables full debugging and flash programming through only TEST/SBWTCK and SBWTDIO pins. |
| Operating Range | –40°C to 125°C ambient temperature; qualified for defense, aerospace, and medical applications per controlled baseline and extended lifecycle requirements. |
Pinout & Package
Package: 14-pin TSSOP (PW), 5.0 mm × 4.4 mm × 1.2 mm body height, lead pitch 0.65 mm, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pin 1) | Power supply input | Core digital supply rail (1.8–3.6 V); must be decoupled locally with 100 nF ceramic capacitor to DVSS. |
| P1.0/TA0CLK/ACLK/A0 (Pin 2) | Multi-function I/O | Configurable as Timer_A clock input, ACLK output, or ADC channel 0 - requires P1SEL bit setting to route peripheral signals. |
| P1.1/TA0.0/A1 (Pin 3) | Timer capture/compare + ADC input | Supports CCI0A capture or Out0 compare output; also serves as analog input A1 - not simultaneously active in same mode. |
| P1.2/TA0.1/A2 (Pin 4) | Timer capture/compare + ADC input | Provides CCI1A capture or Out1 compare; dual-use as ADC channel A2 - routing controlled by ADC10AE0 and P1SEL registers. |
| P1.3/ADC10CLK/A3/VREF−/VEREF− (Pin 5) | ADC clock & reference | Outputs ADC conversion clock; accepts negative reference voltage - enables ratiometric measurements when paired with internal VREF+. |
| P1.4/SMCLK/A4/VREF+/VEREF+/TCK (Pin 6) | System clock & reference & JTAG | SMCLK output, ADC positive reference input, or JTAG test clock - function selected by P1SEL and JTAG state machine. |
| P1.5/TA0.0/A5/SCLK/TMS (Pin 7) | Timer compare + ADC + SPI/I²C + JTAG | Out0 compare output, ADC A5 input, USI clock (SCLK), or JTAG mode select - pin role determined by module enable bits and P1SEL. |
| P1.6/TA0.1/A6/SDO/SCL/TDI/TCLK (Pin 8) | Timer compare + ADC + USI + JTAG | Out1 compare, ADC A6, SPI data out / I²C clock, or JTAG data input/test clock - requires careful conflict avoidance in firmware initialization. |
| P1.7/A7/SDI/SDA/TDO/TDI (Pin 9) | ADC + USI + JTAG | ADC A7 input, SPI data in / I²C data, or JTAG data output/input - TDO/TDI selection controlled by JTAG instruction register. |
| RST/NMI/SBWTDIO (Pin 10) | Reset & debug I/O | Active-low reset input, non-maskable interrupt source, and bidirectional Spy-Bi-Wire data line - requires external pull-up for reliable reset assertion. |
| TEST/SBWTCK (Pin 11) | Debug clock & fuse control | Test mode select during JTAG entry; Spy-Bi-Wire clock input; connects to JTAG fuse - must be held low during normal operation unless debugging. |
| XOUT/P2.7 (Pin 12) | Oscillator output / GPIO | Crystal oscillator buffer output or general-purpose I/O - if used as GPIO, P2SEL.7 must be cleared to disable oscillator driver and prevent excess current. |
| XIN/P2.6/TA0.1 (Pin 13) | Oscillator input / GPIO / Timer | Crystal or external clock input; also serves as P2.6 I/O or Timer_A compare output - crystal operation disabled above 105°C per datasheet note. |
| DVSS (Pin 14) | Ground reference | Digital ground return path; must be connected to system ground plane with low-inductance trace to minimize noise coupling into ADC and clock paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 0.1 µA in LPM4 (RAM retention), 0.5 µA in standby - enables multi-year operation on coin-cell batteries in wireless sensor endpoints. |
| Five configurable low-power modes | Software-selectable LPM0–LPM4 with distinct clock gating and oscillator control - allows precise trade-off between wake-up latency and energy savings per application duty cycle. |
| Integrated 10-bit ADC with autoscan | 8-channel simultaneous sampling and automatic result storage in memory - eliminates CPU polling overhead and enables deterministic sensor acquisition sequences. |
| Spy-Bi-Wire debug interface | 2-pin (SBWTDIO + SBWTCK) in-circuit emulation and flash programming - reduces debug footprint vs full 4-pin JTAG and avoids PCB routing conflicts. |
| Factory-calibrated DCO | DCO frequency trimmed at 1 MHz, 8 MHz, 12 MHz, and 16 MHz across voltage/temperature - ensures accurate timing without external crystal in cost-sensitive designs. |
| Brownout detector with reset | Programmable threshold (1.6 V or 1.9 V) with hysteresis - prevents erratic operation during brownout conditions and guarantees clean restart on power recovery. |
Applications
| Industrial Temperature Sensor Node | Medical Disposable Glucose Monitor |
|---|---|
Use Scenario: Battery-powered wireless node measuring ambient temperature every 30 seconds using an NTC thermistor, transmitting data via BLE module. IC Role / Device Role / Timing Role: MSP430G2231QPW1REP performs ADC sampling, linearization math, SPI communication with BLE SoC, and manages ultra-deep sleep between readings. Use Value: 0.1 µA LPM4 current extends CR2032 battery life beyond 5 years; 1 µs wake-up ensures minimal timing jitter in periodic sampling schedule. |
Use Scenario: Single-use glucose strip reader that powers on only during test strip insertion, measures electrochemical current, computes mg/dL, and displays result. IC Role / Device Role / Timing Role: MSP430G2231QPW1REP acts as analog front-end controller, driving test current, digitizing response, applying calibration coefficients, and updating LCD. Use Value: Integrated 10-bit ADC with internal reference eliminates external precision voltage reference IC; 128 B RAM suffices for real-time computation and display buffering. |
| Aerospace Cabin Pressure Transducer | Defense-Grade Tamper-Evident Seal Controller |
Use Scenario: Embedded pressure transducer in aircraft environmental control system, operating continuously at –40°C to 125°C with MIL-STD-810H compliance. IC Role / Device Role / Timing Role: MSP430G2231QPW1REP reads piezoresistive bridge output via ratiometric ADC, compensates for temperature drift using lookup table, and outputs calibrated digital value over I²C. Use Value: Extended temperature qualification and controlled baseline manufacturing ensure reliability under thermal cycling; internal VREF+/VREF− enables stable ratiometric measurement without external components. |
Use Scenario: Sealed enclosure with mechanical switch and accelerometer detecting unauthorized opening; logs event timestamp and triggers irreversible LED alert. IC Role / Device Role / Timing Role: MSP430G2231QPW1REP monitors interrupt-capable GPIOs, timestamps events using Timer_A, stores encrypted log in flash, and drives tamper-evident indicator. Use Value: On-chip flash programming security fuse prevents firmware extraction; five low-power modes allow continuous monitoring at <1 µA while preserving event history across power cycles. |
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 |
|---|---|---|---|
| MSP430FR2111IPW1R | Ferroelectric RAM (640 B FRAM) replaces flash/RAM; 0.38 µA LPM3.5; no factory DCO calibration; 16 MHz max at 3.3 V. | Superior write endurance and near-zero write latency benefit frequent data logging; lacks extended temp rating (–40°C to 105°C only). | Select for high-cycle data recording where extended temperature range is not required. |
| MSP430G2553IPW20R | 4 kB flash, 512 B RAM, 8-channel USCI (hardware UART/SPI/I²C), 16-bit Timer_B; 0.4 µA LPM4; same 14-TSSOP package but 20-pin variant. | Hardware UART simplifies host communication; larger memory supports more complex algorithms; requires PCB redesign due to pin count and layout change. | Select when UART interface or >2 kB code space is mandatory; not drop-in compatible. |
Compared with MSP430G2231QPW1REP, the MSP430FR2111IPW1R offers FRAM-based data logging advantages but sacrifices military-grade temperature range, while the MSP430G2553IPW20R adds hardware UART and memory headroom at the cost of pin compatibility and extended qualification - making MSP430G2231QPW1REP optimal for cost-sensitive, size-constrained, high-reliability sensor endpoints.
Availability
MSP430G2231QPW1REP is available at Aetrix Electronics and suitable for defense subsystems, aerospace cabin monitoring, and medical disposable devices requiring stable component supply across extended product lifecycles and harsh environmental conditions.
Supply support for MSP430G2231QPW1REP 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 heritage in ultra-low-power microcontrollers for mission-critical applications.
The MSP430G2xx family was engineered specifically for energy-constrained sensing and measurement systems, emphasizing nanowatt operation, integrated analog peripherals, and robust debug capability in compact packages - directly addressing design needs in defense, aerospace, and medical electronics.
FAQ
What is the maximum operating frequency of the MSP430G2231QPW1REP at 2.2 V?
The MSP430G2231QPW1REP supports a maximum system frequency of 12 MHz at 2.2 V supply voltage, as specified in the Recommended Operating Conditions table of SLAS862. This limit applies to MCLK derived from the DCO; higher frequencies (up to 16 MHz) require ≥3.3 V. Exceeding the voltage-scaled frequency limit risks timing violations and unstable operation.
Does the MSP430G2231QPW1REP include hardware UART support?
No, the MSP430G2231QPW1REP does not include a hardware UART peripheral. It features a Universal Serial Interface (USI) module that supports SPI and I²C protocols only. UART functionality must be implemented in firmware using timer-driven bit-banging on GPIO pins - a common approach in ultra-low-power designs where asynchronous serial traffic is infrequent.
How is the ADC reference configured on the MSP430G2231QPW1REP?
The MSP430G2231QPW1REP ADC10 module supports internal reference voltages (1.5 V or 2.5 V) or external references applied to VREF+/VEREF+ (Pin 6) and VREF−/VEREF− (Pin 5). Internal reference selection is controlled by ADC10CTL1 register bits; external reference usage requires disabling internal reference and proper decoupling - enabling flexible ratiometric or absolute measurement schemes.
What debug interface does the MSP430G2231QPW1REP use, and how many pins are required?
The MSP430G2231QPW1REP uses the Spy-Bi-Wire (SBW) interface, a 2-wire subset of JTAG, requiring only two pins: SBWTDIO (Pin 10) and SBWTCK (Pin 11). This eliminates the need for four-pin JTAG headers, reduces PCB routing complexity, and maintains full flash programming and real-time debugging capability - consistent with TI's ultra-low-pin-count MCU strategy.
Is the MSP430G2231QPW1REP qualified for extended temperature operation, and what is its rated range?
Yes, the MSP430G2231QPW1REP is explicitly qualified for extended temperature operation from –40°C to 125°C, as confirmed in Table 2 (Ordering Information) and the "SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS" header of SLAS862. This rating includes controlled baseline manufacturing, extended product lifecycle, and full electrical characterization across the range - meeting MIL-PRF-38535 Class V requirements.
MSP430G2231QPW1REP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430G2231QPW1REP FAQ
1.How can I place an order for MSP430G2231QPW1REP through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2231QPW1REP 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 MSP430G2231QPW1REP reliable?
The price and inventory of MSP430G2231QPW1REP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2231QPW1REP is usually 5 days.
3.What payment methods are accepted for MSP430G2231QPW1REP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2231QPW1REP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2231QPW1REP?
MSP430G2231QPW1REP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2231QPW1REP 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 MSP430G2231QPW1REP?
For technical support, including MSP430G2231QPW1REP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2231QPW1REP requirements.
6.How does Aetrix verify that MSP430G2231QPW1REP is sourced from the original manufacturer or authorized distributors?
All MSP430G2231QPW1REP 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 MSP430G2231QPW1REP meets industry standards.
7.What is the process for return or replacement of MSP430G2231QPW1REP?
All MSP430G2231QPW1REP units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2231QPW1REP, 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 MSP430G2231QPW1REP part is unused and in its original packaging.
Return procedure for MSP430G2231QPW1REP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430G2231QPW1REP Tags
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