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Texas Instruments MSP430G2131IPW14R
- Part No.:
- MSP430G2131IPW14R
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2131IPW14R.pdf
- Description:
- IC MCU 16BIT 1KB FLASH 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,998
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Product details
Overview
MSP430G2131IPW14R 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 8-channel autoscan, Timer_A2 with two capture/compare registers, and USI supporting SPI/I²C-all operating from 1.8 V to 3.6 V. It targets battery-powered sensor nodes requiring analog acquisition, digital processing, and serial communication.
For engineers reviewing the MSP430G2131IPW14R datasheet, MSP430G2131IPW14R pinout, MSP430G2131IPW14R application, or MSP430G2131IPW14R equivalent, key selection criteria include its 10-bit ADC resolution, 14-pin TSSOP package with 10 GPIOs, Spy-Bi-Wire debug interface, LPM4 current of 0.1 µA, and factory-calibrated DCO enabling sub-1-µs wake-up from standby mode.
Technical Context
The MSP430G2131IPW14R implements a 16-bit CPU with seven addressing modes and constant generators for high code efficiency. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external 32-kHz crystal support-enabling flexible low-power timing across six operating modes including LPM4 (0.1 µA).
Peripherals are memory-mapped and fully accessible via all instructions: ADC10 uses internal reference and sample-and-hold; Timer_A2 supports PWM, capture, and interval timing; USI provides hardware-level SPI/I²C framing without CPU overhead; and I/O ports P1 (8-bit) and P2 (2-bit) offer individually configurable pull-up/down resistors and edge-selectable interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 62.5-ns instruction cycle; register-based execution enables deterministic timing for real-time control loops. |
| Flash / RAM | 2 kB flash program memory and 128 B RAM-sufficient for compact firmware with ADC data buffering and USI protocol stacks. |
| ADC10 | 10-bit SAR converter with 200-ksps sampling rate, internal reference, sample-and-hold, and 8-channel autoscan-supports multi-sensor polling without CPU intervention. |
| Timer_A2 | 16-bit timer with two capture/compare registers (TA0.0, TA0.1); enables precise PWM generation, input capture for pulse-width measurement, and periodic interrupt timing. |
| USI Module | Universal Serial Interface supporting SPI master/slave and I²C master modes-reduces firmware complexity for interfacing with sensors, EEPROMs, and displays. |
| Low-Power Modes | Five software-selectable modes including LPM4 (0.1 µA at 2.2 V); ultra-fast wake-up (<1 µs) preserves battery life in duty-cycled sensing applications. |
| Supply Voltage | 1.8 V to 3.6 V operation-compatible with single-cell Li-ion, coin-cell, and regulated 3.3-V rails without level-shifting. |
Pinout & Package
Package: 14-pin Plastic Small-Outline Thin (TSSOP), PW suffix, body width 4.4 mm, lead pitch 0.65 mm. Pin 1 marked by beveled corner; pins 13–14 and 1–2 are DVSS/DVCC power pairs for noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0 / TA0CLK / ACLK | Port 1 bit 0 / Timer_A clock input / Auxiliary clock output | Configurable as GPIO or dedicated clock source/sink; supports external signal synchronization and low-frequency timing distribution. |
| P1.1 / TA0.0 / A1 | Port 1 bit 1 / Timer_A capture/compare 0 / ADC channel 1 | Enables simultaneous PWM output (Out0), input capture (CCI0A), or analog sensing-no pin remapping required. |
| P1.2 / TA0.1 / A2 | Port 1 bit 2 / Timer_A capture/compare 1 / ADC channel 2 | Dual-function pin for complementary PWM outputs (Out1), pulse-width measurement (CCI1A), or analog input routing. |
| P1.3 / ADC10CLK / A3 / VREF− | Port 1 bit 3 / ADC conversion clock / ADC channel 3 / ADC negative reference | Provides internal ADC clocking, third analog input, and selectable negative reference-supports differential ADC configurations. |
| P1.4 / SMCLK / A4 / VREF+ | Port 1 bit 4 / Sub-Main clock output / ADC channel 4 / ADC positive reference | Delivers system-peripheral clock (SMCLK) while serving as analog input or programmable reference voltage source. |
| P1.5 / TA0.0 / SCLK / A5 / TMS | Port 1 bit 5 / Timer_A compare 0 / USI clock / ADC channel 5 / JTAG test mode select | Shared function pin optimized for SPI clocking (SCLK), PWM output, or JTAG boundary scan-mode selected via port control registers. |
| 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 test data in | Multi-protocol pin supporting SPI data transmission, I²C bus clocking, or JTAG programming-hardware-controlled mode switching. |
| P1.7 / SDI / SDA / A7 / TDO / TDI | Port 1 bit 7 / USI data in / I²C data / ADC channel 7 / JTAG test data out/in | Handles bidirectional I²C data, SPI input, or JTAG test data-enables shared physical layer for debug and peripheral communication. |
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire data I/O | Single-pin debug interface for programming and runtime debugging using TI's Spy-Bi-Wire protocol-eliminates need for full 4-wire JTAG. |
| TEST/SBWTCK | Test mode select / Spy-Bi-Wire clock | Activates on-chip emulation logic; used with RST/NMI pin for 2-wire programming-reduces PCB footprint and connector count. |
| XIN / P2.6 / TA0.1 | Crystal oscillator input / Port 2 bit 6 / Timer_A compare 1 | Supports external 32.768-kHz crystal for precision RTC timing while doubling as GPIO or PWM output when crystal not used. |
| XOUT / P2.7 | Crystal oscillator output / Port 2 bit 7 | Drives external crystal load; functions as general-purpose I/O when oscillator disabled-enables dual-use of limited pin count. |
| DVSS (pins 13, 14) | Digital ground reference | Dual ground pins reduce impedance and improve noise immunity for analog and digital sections-critical for ADC accuracy. |
| DVCC (pins 1, 2) | Digital supply voltage | Dual supply pins ensure stable core voltage delivery under transient load conditions-supports reliable operation during ADC conversions and USI bursts. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | Active mode: 220 µA at 1 MHz/2.2 V; Standby: 0.5 µA; Off mode (RAM retention): 0.1 µA-enables multi-year battery life in wireless sensor endpoints. |
| Factory-calibrated DCO | Internal 1–16 MHz digitally controlled oscillator with ±3% accuracy at 1 MHz-eliminates external crystal for cost-sensitive timing-critical applications. |
| Brownout detector | Programmable reset threshold with hysteresis prevents erratic behavior during brownout events-ensures robust startup and shutdown sequencing. |
| On-chip emulation logic | Spy-Bi-Wire interface with 2-breakpoint capability enables full-speed debugging over two pins-reduces development time without adding debug headers. |
| Programmable code protection | Security fuse prevents unauthorized flash read-out-protects proprietary firmware algorithms in deployed devices. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node transmitting data via SPI-connected RF transceiver every 30 seconds. IC Role / Device Role / Timing Role: MSP430G2131IPW14R acquires analog sensor outputs via ADC10, processes values, configures USI for SPI frame transmission, and enters LPM4 between cycles. Use Value: 0.1 µA LPM4 current extends CR2032 battery life beyond 5 years; sub-1-µs wake-up ensures precise timing alignment for scheduled transmissions. |
Use Scenario: Handheld pulse oximeter measuring SpO₂ and heart rate using photodiode signals conditioned by op-amps. IC Role / Device Role / Timing Role: MSP430G2131IPW14R samples dual-channel analog front-end at 200 ksps, computes ratios in real time, and drives OLED display via USI I²C. Use Value: 10-bit ADC with internal reference eliminates external voltage reference IC; 14-pin TSSOP fits compact handheld enclosure with minimal board area. |
| Smart Utility Meter Interface | Industrial Data Logger |
|
Use Scenario: Tamper-resistant electricity meter add-on module reading kWh via isolated current transformer and communicating via I²C to main MCU. IC Role / Device Role / Timing Role: MSP430G2131IPW14R acts as isolated sensor interface, performing ADC acquisition, CRC validation, and I²C slave response to host queries. Use Value: Brownout detector prevents corrupted data writes during mains dips; programmable code protection secures utility-specific calibration constants. |
Use Scenario: Ruggedized environmental logger recording temperature, pressure, and humidity every minute onto SPI flash memory. IC Role / Device Role / Timing Role: MSP430G2131IPW14R manages multi-channel ADC autoscan, controls SPI flash write cycles, and maintains RTC using 32-kHz crystal on XIN/XOUT. Use Value: Dual DVCC/DVSS pins minimize noise coupling into ADC measurements; Timer_A2 generates precise 60-second intervals independent of CPU load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2231IPW14 | Includes 8-channel ADC10 (vs. 8-channel in MSP430G2131IPW14R) but adds no additional peripherals; identical pinout, package, and memory size. | Same use cases; preferred when full 8-channel ADC utilization is required without changing layout. | Select MSP430G2231IPW14 only if application requires all eight ADC inputs simultaneously-MSP430G2131IPW14R supports up to eight channels but shares some with timer/USI functions. |
| MSP430G2121IPW14 | Omits ADC10 entirely; retains same 2 kB flash, 128 B RAM, Timer_A2, USI, and low-power modes-pin-compatible but lacks analog front-end. | Applicable where only digital I/O, timing, and serial communication are needed-e.g., LED controller or simple logic sequencer. | Choose MSP430G2121IPW14 when analog sensing is unnecessary; it reduces BOM cost and simplifies design by removing unused ADC circuitry. |
Compared with MSP430G2231IPW14 and MSP430G2121IPW14, the MSP430G2131IPW14R delivers optimal balance of analog capability (8-channel ADC), serial interface flexibility (SPI/I²C), and ultra-low-power operation in a 14-pin TSSOP-making it ideal for cost-constrained, battery-operated sensor systems requiring both acquisition and communication.
Availability
MSP430G2131IPW14R is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MSP430G2131IPW14R 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 expertise in ultra-low-power microcontrollers for industrial and consumer applications.
The MSP430G2xx family was designed specifically for cost-sensitive, battery-powered measurement systems-emphasizing energy efficiency, integrated analog peripherals, and minimal external component count to accelerate time-to-market.
FAQ
What is the maximum ADC sampling rate supported by the MSP430G2131IPW14R?
The MSP430G2131IPW14R supports a maximum ADC10 sampling rate of 200 ksps (kilo-samples per second) with internal reference and sample-and-hold enabled. This rate is achievable when using the internal DCO clock at 16 MHz and configuring the ADC10CTL1 register for maximum conversion speed. The MSP430G2131IPW14R achieves this performance without external clock sources or buffers, making it suitable for real-time analog monitoring in compact designs.
Does the MSP430G2131IPW14R support hardware UART functionality?
No, the MSP430G2131IPW14R does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) module that supports SPI and I²C protocols only. For UART communication, designers must implement software-based bit-banged UART using GPIO pins and Timer_A2 for baud rate timing-though this increases CPU overhead and reduces timing precision compared to hardware UART.
What debug interface does the MSP430G2131IPW14R use, and how many pins are required?
The MSP430G2131IPW14R uses the Spy-Bi-Wire (SBW) debug interface, which requires only two pins: RST/NMI/SBWTDIO and TEST/SBWTCK. This 2-wire interface supports full-speed programming, breakpoint setting, and real-time variable inspection-eliminating the need for a 4-pin JTAG header and reducing PCB space and connector cost versus traditional debug solutions.
Can the MSP430G2131IPW14R operate from a single 1.8-V supply, and what are the implications for flash programming?
Yes, the MSP430G2131IPW14R operates from 1.8 V to 3.6 V during program execution, but flash programming requires a minimum supply of 2.2 V. At 1.8 V, the device runs reliably in active and low-power modes, but attempting flash erase/write below 2.2 V will fail or corrupt memory. Designers must ensure voltage regulation or sequencing meets this requirement during firmware updates.
How many GPIO pins are available on the MSP430G2131IPW14R, and are they all individually configurable?
The MSP430G2131IPW14R provides 10 GPIO pins: eight bits on Port 1 (P1.0–P1.7) and two bits on Port 2 (P2.6–P2.7). Each pin is individually configurable for input/output direction, pull-up/pull-down resistor enable, interrupt edge select, and peripheral function assignment via dedicated control registers-enabling flexible I/O mapping without hardware constraints.
MSP430G2131IPW14R 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:
- 1KB (1K 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:
MSP430G2131IPW14R FAQ
1.How can I place an order for MSP430G2131IPW14R through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2131IPW14R 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 MSP430G2131IPW14R reliable?
The price and inventory of MSP430G2131IPW14R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2131IPW14R is usually 5 days.
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MSP430G2131IPW14R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2131IPW14R 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 MSP430G2131IPW14R?
For technical support, including MSP430G2131IPW14R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2131IPW14R requirements.
6.How does Aetrix verify that MSP430G2131IPW14R is sourced from the original manufacturer or authorized distributors?
All MSP430G2131IPW14R 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 MSP430G2131IPW14R meets industry standards.
7.What is the process for return or replacement of MSP430G2131IPW14R?
All MSP430G2131IPW14R units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2131IPW14R, 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 MSP430G2131IPW14R part is unused and in its original packaging.
Return procedure for MSP430G2131IPW14R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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