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Texas Instruments MSP430G2231IN14
- Part No.:
- MSP430G2231IN14
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MSP430G2231IN14.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
MSP430G2231IN14 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in 14-pin PDIP packaging, 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 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 MSP430G2231IN14 datasheet, MSP430G2231IN14 pinout, MSP430G2231IN14 application, or MSP430G2231IN14 equivalent, this page delivers verified functional identity, validated PDIP-14 pin mapping, confirmed low-power operating modes (LPM0–LPM4), real-world timing roles (ACLK/SMCLK/MCLK sources), and precise ADC10 channel allocation - all essential for embedded firmware development and PCB layout validation.
Technical Context
The MSP430G2231IN14 implements a 16-bit CPU with constant generators and seven addressing modes, executing instructions in one MCLK cycle. 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 - enabling sub-1 µs wake-up from LPM4.
Peripherals include a 10-bit SAR ADC with sample-and-hold and autoscan across eight analog inputs (A0–A7), a two-register Timer_A2 for PWM and interval timing, and a Universal Serial Interface (USI) configurable for synchronous SPI or I²C communication - all accessible via P1.x and P2.x GPIO with individually programmable pull-up/down resistors and edge-selectable interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 51-instruction set; enables efficient C code execution and deterministic interrupt latency. |
| Flash / RAM | 2 kB flash memory (512-byte segments) and 128 B RAM; supports in-system programming via Spy-Bi-Wire and on-chip emulation. |
| ADC10 | 10-bit SAR converter with 200-ksps sampling, internal reference, sample-and-hold, and autoscan across A0–A7; eliminates external reference and reduces BOM count. |
| Power Modes | Five software-selectable low-power modes: LPM0–LPM4; LPM4 draws only 0.1 µA at 2.2 V with RAM retention - critical for multi-year battery life. |
| Timer_A2 | 16-bit timer with two capture/compare registers (TA0.0, TA0.1); supports PWM generation, input capture, and interval timing with independent interrupt vectors. |
| USI Module | Universal Serial Interface supporting hardware SPI (3-wire) and I²C (2-wire); shares pins P1.6/P1.7 with Timer_A and ADC, enabling flexible peripheral multiplexing. |
| Supply Range | 1.8 V to 3.6 V operation; flash programming requires ≥2.2 V - ensures compatibility with coin-cell (e.g., CR2032) and single Li-ion supply rails. |
Pinout & Package
Package: 14-pin Plastic Dual Inline Package (PDIP), 0.3-inch body width, through-hole mounting compatible with standard prototyping and legacy production workflows.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DVCC) | Power supply | Main digital supply voltage input (1.8–3.6 V); must be decoupled locally with 100 nF ceramic capacitor. |
| 14, 13 (DVSS) | Ground reference | Digital ground return path; both pins must connect to common system ground plane for noise immunity. |
| 10 (RST/NMI/SBWTDIO) | Reset & debug I/O | Active-low reset input; also serves as NMI source and Spy-Bi-Wire data I/O for programming and debugging. |
| 11 (TEST/SBWTCK) | Debug clock input | Test mode select during programming; provides Spy-Bi-Wire clock signal - requires external 10-kΩ pull-down for normal operation. |
| 12 (XOUT/P2.7) | Oscillator output | Crystal oscillator output terminal; used with external 32.768-kHz crystal for ACLK generation or as general-purpose I/O. |
| 13 (XIN/P2.6/TA0.1) | Oscillator input | Crystal oscillator input; also functions as Timer_A compare output TA0.1 - requires series resistor when used as GPIO. |
| P1.0–P1.7 | General-purpose I/O | Eight bidirectional pins with individual direction control, interrupt enable, edge select, and pull-up/down resistors; P1.4–P1.7 support USI (SPI/I²C) and JTAG signals. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | Active mode: 220 µA at 1 MHz/2.2 V; LPM4: 0.1 µA with RAM retention - enables >10-year operation on CR2032 battery in periodic-sensing applications. |
| Digitally controlled oscillator (DCO) | Factory-calibrated DCO frequencies up to 16 MHz with <1 µs wake-up from LPM4 - eliminates need for external high-speed crystal while maintaining timing precision. |
| Integrated ADC10 | 10-bit resolution, 200-ksps sampling, internal reference, and autoscan across eight channels - reduces external component count and PCB area in sensor front-ends. |
| Spy-Bi-Wire interface | Two-wire debug and programming interface using RST/NMI and TEST pins - enables in-circuit programming without dedicated JTAG header footprint. |
| Brownout detector | Monitors DVCC and triggers reset if voltage drops below threshold - prevents erratic code execution during battery depletion or power transients. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node transmitting data via SPI-connected sub-GHz RF transceiver. IC Role / Device Role / Timing Role: MSP430G2231IN14 acquires analog sensor outputs via ADC10, processes values, configures USI for SPI master mode to drive RF IC, and manages LPM3/LPM4 sleep cycles between readings. Use Value: 0.7 µA LPM3 current with 32-kHz crystal enables 30-second wake intervals and >5-year CR2032 lifetime; integrated DCO avoids external 16-MHz crystal cost and layout complexity. |
Use Scenario: Handheld pulse oximeter capturing photodiode signals and driving OLED display via I²C. IC Role / Device Role / Timing Role: MSP430G2231IN14 samples dual-channel analog front-end at 200 ksps, executes SpO₂ algorithm, and uses USI in I²C master mode to update display and control LED drivers. Use Value: ADC10 autoscan across A0–A3 allows simultaneous red/IR LED current monitoring and ambient light rejection without CPU intervention; 128 B RAM suffices for real-time buffer storage. |
| Smart Meter Tamper Detection | Industrial Control Panel |
|
Use Scenario: Utility meter detecting magnetic tampering via Hall-effect sensor and logging events to EEPROM over SPI. IC Role / Device Role / Timing Role: MSP430G2231IN14 monitors analog Hall sensor output via ADC10 channel A5, triggers interrupt on threshold breach, and initiates SPI write to external memory using USI. Use Value: Edge-selectable interrupt on P1.5 enables immediate response to tamper events; brownout detector prevents false triggers during voltage sags caused by magnetic interference. |
Use Scenario: DIN-rail mounted HMI panel reading rotary encoder position and controlling relay outputs via GPIO. IC Role / Device Role / Timing Role: MSP430G2231IN14 reads quadrature encoder signals on P1.0/P1.1 using Timer_A capture mode, debounces mechanical switches on P1.2–P1.3, and drives relays via P1.4–P1.7. Use Value: Two Timer_A capture registers allow simultaneous high-resolution speed/direction measurement; 14-pin PDIP simplifies hand-soldering for low-volume industrial assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2231IPW14 | Identical core, peripherals, and specs; differs only in 14-pin TSSOP (PW) package instead of PDIP (N). | TSSOP requires reflow soldering and finer pitch layout; unsuitable for breadboarding or through-hole prototyping. | Select MSP430G2231IPW14 for space-constrained PCBs where surface-mount assembly is available. |
| MSP430G2221IN14 | Omits ADC10 module; retains 2 kB flash, 128 B RAM, Timer_A2, USI, and same power modes. | Cannot perform analog sensing; suitable only for digital control, logic sequencing, or communication-only tasks. | Choose MSP430G2221IN14 when analog conversion is unnecessary and lowest BOM cost is prioritized. |
Compared with MSP430G2231IPW14, the MSP430G2231IN14 offers identical functionality in a through-hole package for manual assembly and rapid prototyping; versus MSP430G2221IN14, it adds essential ADC10 capability for sensor interfacing - making it the only option among the three that supports mixed-signal embedded applications out-of-the-box.
Availability
MSP430G2231IN14 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart meter tamper detection, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and legacy through-hole compatibility.
Supply support for MSP430G2231IN14 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 sensing applications.
The MSP430G2xx family was designed specifically for cost-sensitive, battery-operated systems requiring extended runtime, integrated analog peripherals, and minimal external components - positioning MSP430G2231IN14 as a foundational device for entry-level mixed-signal embedded designs.
FAQ
What is the maximum operating frequency of the MSP430G2231IN14?
The MSP430G2231IN14 supports a maximum MCLK frequency of 16 MHz at VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC = 1.8 V. This is achieved using the factory-calibrated digitally controlled oscillator (DCO), which stabilizes in under 1 µs - enabling rapid wake-up from low-power modes without external crystal startup delay. The MSP430G2231IN14 does not require an external high-frequency crystal for full-speed operation.
Does the MSP430G2231IN14 support hardware UART communication?
No, the MSP430G2231IN14 does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) module that supports only synchronous protocols: SPI (3-wire) and I²C (2-wire). Asynchronous UART functionality must be implemented in firmware using Timer_A and GPIO - a known design constraint documented in the SLAS694J datasheet. For native UART, engineers should consider MSP430G2553 or higher-series devices.
How many analog input channels does the ADC10 module support on the MSP430G2231IN14?
The ADC10 module on the MSP430G2231IN14 supports eight analog input channels: A0 through A7, mapped to P1.0–P1.3 and P1.4–P1.7 respectively. These are accessible via the ADC10AE0 register and support autoscan mode for sequential conversion without CPU intervention. Channel selection, reference voltage (internal or external), and sample timing are fully configurable in software - confirmed in Table 2 and Section 13 of the SLAS694J datasheet.
What debug interface does the MSP430G2231IN14 use, and what pins are required?
The MSP430G2231IN14 uses the two-wire Spy-Bi-Wire (SBW) interface for programming and debugging, requiring only two pins: RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). Unlike full JTAG, SBW eliminates the need for TDI/TDO/TMS pins, reducing debug footprint. This interface is supported by TI's MSP-FET and open-source tools like naken_asm - and is explicitly documented in the "On-Chip Emulation Logic" feature list and Pinout Tables of SLAS694J.
Is the MSP430G2231IN14 pin-compatible with other devices in the MSP430G2x31 family?
Yes, the MSP430G2231IN14 is pin-compatible with all 14-pin PDIP variants in the MSP430G2x31 family, including MSP430G2131IN14 and MSP430G2031IN14. They share identical pinouts, power/ground placement, and peripheral mappings (e.g., P1.6/P1.7 for USI, P2.6/P2.7 for crystal). Differences lie solely in flash size (2 kB vs 1 kB vs 512 B) and peripheral inclusion (e.g., ADC10 present only in G2x31), allowing direct substitution in hardware when firmware accommodates memory/peripheral constraints.
MSP430G2231IN14 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- MSP430G2xx
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
MSP430G2231IN14 FAQ
1.How can I place an order for MSP430G2231IN14 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2231IN14 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 MSP430G2231IN14 reliable?
The price and inventory of MSP430G2231IN14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2231IN14 is usually 5 days.
3.What payment methods are accepted for MSP430G2231IN14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2231IN14 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2231IN14?
MSP430G2231IN14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2231IN14 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 MSP430G2231IN14?
For technical support, including MSP430G2231IN14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2231IN14 requirements.
6.How does Aetrix verify that MSP430G2231IN14 is sourced from the original manufacturer or authorized distributors?
All MSP430G2231IN14 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 MSP430G2231IN14 meets industry standards.
7.What is the process for return or replacement of MSP430G2231IN14?
All MSP430G2231IN14 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2231IN14, 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 MSP430G2231IN14 part is unused and in its original packaging.
Return procedure for MSP430G2231IN14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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