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Texas Instruments MSP430G2231IPW14
- Part No.:
- MSP430G2231IPW14
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2231IPW14.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,253
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Product details
Overview
MSP430G2231IPW14 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 2 kB flash, 128 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, Timer_A with two capture/compare registers, and a Universal Serial Interface (USI) supporting SPI and I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes requiring precise analog acquisition and low-energy communication.
For engineers reviewing the MSP430G2231IPW14 datasheet, MSP430G2231IPW14 pinout, MSP430G2231IPW14 application, or MSP430G2231IPW14 equivalent, this page delivers verified functional identity, TSSOP-14 package mapping, confirmed ADC10/USI/Timer_A capabilities, and validated alternative options for cost-sensitive, low-power embedded designs.
Technical Context
The MSP430G2231IPW14 implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions in one MCLK cycle. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external 32-kHz crystal support - enabling sub-1-µs wake-up from LPM4.
Peripherals include a 10-bit SAR ADC with sample-and-hold and autoscan across eight channels, USI configured for synchronous SPI/I²C master/slave operation, and Timer_A2 with dual capture/compare registers supporting PWM, interval timing, and input capture - all accessible via memory-mapped registers at fixed offsets (e.g., ADC10CTL0 at 0x01B0, TACCR0 at 0x0172).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers; enables efficient C code execution and deterministic interrupt latency. |
| Flash / RAM | 2 kB flash program memory + 128 B RAM; sufficient for compact firmware with ADC data buffering and protocol stack logic. |
| ADC Resolution & Speed | 10-bit SAR ADC, 200 ksps max; supports real-time sampling of analog sensors (e.g., temperature, light) without CPU overhead via autoscan. |
| Low-Power Modes | Five software-selectable modes including LPM4 (0.1 µA at 2.2 V); extends coin-cell battery life to multi-year operation in sleep-dominated applications. |
| Communication Interface | USI module supporting hardware SPI and I²C; eliminates bit-banging overhead and ensures reliable peripheral interfacing (e.g., EEPROM, digital sensors). |
| Supply Voltage Range | 1.8 V to 3.6 V; compatible with single-cell Li-ion, alkaline, or NiMH batteries without external regulation. |
| Max System Frequency | 16 MHz at 3.3 V; provides adequate processing headroom for sensor fusion or lightweight control algorithms while maintaining ultra-low active current (300 µA @ 1 MHz, 3 V). |
Pinout & Package
Package: 14-pin TSSOP (PW), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0CLK/ACLK/A0 | Port 1 bit 0 / Timer_A clock input / Auxiliary clock output / ADC channel 0 | Multi-function I/O supporting timer synchronization, low-frequency clock distribution, and primary analog input. |
| P1.1/TA0.0/A1 | Port 1 bit 1 / Timer_A capture/compare 0 / ADC channel 1 | Enables edge-triggered event capture (e.g., pulse width measurement) and second analog sensing point. |
| P1.2/TA0.1/A2 | Port 1 bit 2 / Timer_A capture/compare 1 / ADC channel 2 | Supports dual-input timing measurements or third analog sensor channel with shared timer resource. |
| P1.3/ADC10CLK/A3/VREF-/VEREF- | Port 1 bit 3 / ADC conversion clock / ADC channel 3 / ADC negative reference | Configurable as ADC clock source or dedicated analog input; sets lower reference for differential ADC operation. |
| P1.4/SMCLK/A4/VREF+/VEREF+/TCK | Port 1 bit 4 / Sub-main clock output / ADC channel 4 / JTAG test clock | Provides system clock signal to peripherals; serves as positive ADC reference or JTAG programming interface. |
| P1.5/TA0.0/SCLK/A5/TMS | Port 1 bit 5 / Timer_A compare 0 / USI clock / ADC channel 5 / JTAG mode select | Dual-role pin for timer output and synchronous serial clock; also functions as JTAG control during debug. |
| P1.6/TA0.1/SDO/SCL/A6/TDI/TCLK | Port 1 bit 6 / Timer_A compare 1 / USI data out / I²C clock / ADC channel 6 / JTAG data in | Enables SPI slave transmit, I²C bus clocking, or JTAG programming - requires careful mode selection. |
| P1.7/SDI/SDA/A7/TDO/TDI | Port 1 bit 7 / USI data in / I²C data / ADC channel 7 / JTAG data out/in | Handles serial receive, bidirectional I²C data, or JTAG data transfer - critical for debug and sensor interfacing. |
| RST/NMI/SBWTDIO | Reset / non-maskable interrupt / Spy-Bi-Wire data I/O | Primary reset vector and debug interface pin; supports in-system programming without external voltage. |
| TEST/SBWTCK | JTAG test select / Spy-Bi-Wire clock | Activates JTAG mode for full emulation; used with SBW for low-pin-count debugging and programming. |
| XIN/P2.6/TA0.1 | Crystal oscillator input / Port 2 bit 6 / Timer_A compare 1 | Accepts 32.768 kHz crystal for precision RTC or serves as GPIO/timer output when crystal unused. |
| XOUT/P2.7 | Crystal oscillator output / Port 2 bit 7 | Drives crystal load; configurable as general-purpose I/O if external oscillator is disabled. |
| DVCC | Digital supply voltage (pins 1, 15, 16) | Three dedicated VCC pins ensure stable core voltage under dynamic current loads and reduce IR drop. |
| DVSS | Digital ground (pins 14, 13) | Dual ground connections minimize noise coupling between analog and digital sections. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 µA in LPM4 (RAM retention), 220 µA active @ 1 MHz/2.2 V - enables decade-scale battery life in wireless sensors. |
| Integrated 10-bit ADC | Hardware autoscan across 8 channels with internal 1.5-V reference; eliminates external reference IC and reduces BOM count. |
| USI serial interface | Single hardware module supporting both SPI and I²C protocols; saves die area and simplifies firmware versus dual peripheral implementations. |
| Fast wake-up capability | <1 µs wake from LPM4 to active mode using DCO; allows rapid response to external interrupts (e.g., motion detection) without latency penalty. |
| On-chip Spy-Bi-Wire debug | Two-wire JTAG interface (SBWTDIO/SBWTCK) enables full emulation and flash programming - no 4-pin JTAG header required. |
| Brownout detector | Programmable threshold prevents erratic operation during battery voltage sag; avoids corrupted flash writes or state machine faults. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and light data for BLE transmission. IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, USI-based sensor reads, and low-power radio wake-up coordination. Use Value: 0.1 µA LPM4 current extends CR2032 battery life beyond 3 years; integrated ADC and USI reduce external component count by ≥4. |
Use Scenario: Wearable pulse oximeter acquiring analog photodiode signals and driving LED drivers via PWM. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized 10-bit ADC sampling and Timer_A-generated LED drive waveforms. Use Value: Hardware autoscan and dual capture/compare registers enable precise LED timing and simultaneous analog capture without CPU intervention. |
| Smart Utility Meter Interface | Industrial Condition Monitor |
|
Use Scenario: Sub-metering module reading current/voltage transformers and communicating via RS-485 using isolated UART bridge. IC Role / Device Role / Timing Role: Isolated interface controller handling ADC front-end, USI-driven level-shifting logic, and watchdog-managed fault recovery. Use Value: Brownout detection prevents false readings during grid voltage dips; five low-power modes allow deep sleep between metering intervals. |
Use Scenario: Vibration sensor node on rotating machinery capturing accelerometer data and triggering alerts on anomaly detection. IC Role / Device Role / Timing Role: Edge-triggered interrupt handler waking from LPM4 to capture timestamped ADC samples via Timer_A capture inputs. Use Value: Sub-1-µs wake-up ensures no vibration edge is missed; 16-MHz DCO supports real-time FFT preprocessing in active mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2553IPW14 | 16 kB flash, 512 B RAM, enhanced USCI (UART/SPI/I²C), 8-channel ADC, additional timers - larger memory and richer peripherals. | Required for applications needing UART communication, larger firmware, or multiple concurrent protocols. | Select when firmware complexity exceeds 2 kB or UART interface is mandatory; same TSSOP-14 footprint but higher cost. |
| MSP430FR2111IPW14 | Ferroelectric RAM (FRAM) instead of flash, 1 kB FRAM, 0.5 kB RAM, 10-bit ADC, USCI, LPM3.5 (10 nA), no BSL required. | Preferred for write-intensive logging, frequent firmware updates, or ultra-deep sleep (<100 nA) requirements. | Choose for energy harvesting systems or applications requiring >10¹⁴ write cycles; FRAM enables instant non-volatile storage without delay. |
Compared with MSP430G2231IPW14, the MSP430G2553IPW14 offers scalable memory and UART for complex connectivity, while the MSP430FR2111IPW14 replaces flash with endurance-critical FRAM and achieves deeper sleep - making each suitable for distinct power, memory, and reliability trade-offs.
Availability
MSP430G2231IPW14 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meter interfaces, and industrial condition monitors requiring stable component supply and long-term manufacturability.
Supply support for MSP430G2231IPW14 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 over 90 years of innovation in low-power design.
The MSP430G2xx series was engineered specifically for ultra-low-power sensing and measurement applications, emphasizing minimal active/sleep current, integrated analog peripherals, and robust debug capability in compact packages.
FAQ
What is the maximum ADC sampling rate supported by the MSP430G2231IPW14?
The MSP430G2231IPW14 features a 10-bit successive approximation register (SAR) ADC capable of up to 200 ksamples per second. This maximum rate assumes optimal conditions: internal reference enabled, autoscan disabled, and conversion clock derived from the DCO at its highest stable frequency. Real-world throughput may be lower depending on reference selection, channel count, and software overhead.
Does the MSP430G2231IPW14 support UART communication?
No, the MSP430G2231IPW14 does not include a dedicated UART peripheral. It contains only the Universal Serial Interface (USI), which supports hardware SPI and I²C protocols. UART functionality must be implemented in software using timer-generated bit-banging or external level translators - TI recommends the MSP430G2553IPW14 for native UART support.
What debug interface does the MSP430G2231IPW14 use, and how many pins are required?
The MSP430G2231IPW14 uses the two-wire Spy-Bi-Wire (SBW) interface for debugging and programming, requiring only RST/NMI/SBWTDIO (pin 10) and TEST/SBWTCK (pin 11). This eliminates the need for a full 4-pin JTAG header, reducing PCB footprint and simplifying prototype development compared to legacy JTAG-only devices.
Can the MSP430G2231IPW14 operate from a single 1.5-V alkaline cell?
No - the MSP430G2231IPW14 requires a minimum supply voltage of 1.8 V for guaranteed operation. A fresh alkaline cell starts near 1.6 V and drops rapidly under load; therefore, direct operation is unreliable. Use a low-quiescent boost converter (e.g., TPS61200) or select a 1.8-V–rated battery chemistry like lithium thionyl chloride for single-cell compatibility.
How many I/O pins does the MSP430G2231IPW14 provide, and what are their key capabilities?
The MSP430G2231IPW14 provides ten programmable I/O pins: eight on Port 1 (P1.0–P1.7) and two on Port 2 (P2.6–P2.7). All pins support individually configurable direction, pull-up/pull-down resistors, and interrupt-on-change. P1 pins additionally multiplex with ADC inputs, Timer_A functions, and USI signals - enabling flexible peripheral routing within the 14-pin TSSOP constraint.
MSP430G2231IPW14 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430G2xx
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- 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:
MSP430G2231IPW14 FAQ
1.How can I place an order for MSP430G2231IPW14 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2231IPW14 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 MSP430G2231IPW14 reliable?
The price and inventory of MSP430G2231IPW14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2231IPW14 is usually 5 days.
3.What payment methods are accepted for MSP430G2231IPW14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2231IPW14 transactions.
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4.How is shipping managed for MSP430G2231IPW14?
MSP430G2231IPW14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2231IPW14 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 MSP430G2231IPW14?
For technical support, including MSP430G2231IPW14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2231IPW14 requirements.
6.How does Aetrix verify that MSP430G2231IPW14 is sourced from the original manufacturer or authorized distributors?
All MSP430G2231IPW14 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 MSP430G2231IPW14 meets industry standards.
7.What is the process for return or replacement of MSP430G2231IPW14?
All MSP430G2231IPW14 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2231IPW14, 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 MSP430G2231IPW14 part is unused and in its original packaging.
Return procedure for MSP430G2231IPW14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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