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Texas Instruments MSP430G2231IPW4RQ1
- Part No.:
- MSP430G2231IPW4RQ1
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2231IPW4RQ1.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 14TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430G2231IPW4RQ1 from Texas Instruments is an AEC-Q100 qualified automotive-grade 16-bit RISC microcontroller with 2 KB flash, 128 B RAM, 10-bit 200-ksps ADC, Timer_A2 with two capture/compare registers, USI supporting SPI/I²C, and ultra-low-power operation (220 µA active @ 1 MHz/2.2 V, 0.1 µA off mode). It targets battery-powered sensor nodes in vehicle cabin monitoring systems.
For engineers reviewing the MSP430G2231IPW4RQ1 datasheet, MSP430G2231IPW4RQ1 pinout, MSP430G2231IPW4RQ1 application, or MSP430G2231IPW4RQ1 equivalent, key selection criteria include automotive qualification, 14-pin TSSOP (PW) package compatibility, Spy-Bi-Wire debug interface, integrated ADC reference, and LPM3/LPM4 wake-up timing under 1 µs.
Technical Context
The MSP430G2231IPW4RQ1 implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions in one cycle. Its clock system integrates a factory-calibrated DCO (up to 16 MHz), internal VLO, and external 32-kHz crystal support via XIN/XOUT pins on P2.6/P2.7.
Peripherals are memory-mapped and fully accessible via all CPU instructions. The USI module provides hardware-level SPI and I²C protocol handling without CPU intervention, while the ADC10 supports autoscan across eight analog inputs with internal reference and sample-and-hold - all operating within the 1.8–3.6 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generators; enables high code efficiency for embedded control tasks. |
| Flash / RAM | 2 KB flash (512-byte segments) + 128 B RAM; supports in-system programming via Spy-Bi-Wire and includes segment-A calibration data. |
| ADC Resolution & Speed | 10-bit SAR ADC with 200-ksps sampling rate and autoscan across 8 channels; includes internal reference and sample-and-hold for sensor signal digitization. |
| Power Modes | Active mode (220 µA @ 1 MHz/2.2 V), LPM3 (0.5 µA), LPM4 (0.1 µA); enables multi-year battery life in always-on automotive sensors. |
| Timer & Communication | Timer_A2 with two capture/compare registers; USI supporting SPI master/slave and I²C master modes - no external transceivers required. |
| Debug Interface | Spy-Bi-Wire 2-wire interface (SBWTDIO/SBWTCK on pins 9/11); eliminates need for full JTAG header, saving PCB space and cost. |
| Supply Range | 1.8 V to 3.6 V operation; compatible with single-cell Li-ion, LiFePO₄, or regulated 3.3 V automotive domains. |
Pinout & Package
14-pin TSSOP (PW) package, 5 mm × 4.4 mm body size, surface-mount, lead-free and RoHS compliant. Pin 1 marked by dot; pin 14 is DVSS (ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0CLK/ACLK/A0 | Multi-function I/O | Timer_A clock input, ACLK output, or ADC channel 0 - configurable per application needs without external muxing. |
| P1.3/ADC10CLK/A3/VREF-/VEREF- | Analog reference & clock | Provides ADC negative reference and conversion clock; enables precise ratiometric measurements using internal or external references. |
| P1.4/SMCLK/A4/VREF+/VEREF+/TCK | System clock & debug | Outputs SMCLK for peripheral sync; supplies positive ADC reference; doubles as JTAG TCK during programming - shared pin reduces footprint. |
| P1.7/SDI/SDA/TDO/TDI | Serial data I/O | USI data input (SPI) or I²C data line (SDA); also serves as JTAG test data path - simplifies debug and communication routing. |
| RST/NMI/SBWTDIO | Reset & debug I/O | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data line - consolidates critical control functions into one pin. |
| XIN/P2.6/TA0.1 | Clock & timer input | Crystal oscillator input or Timer_A compare output; allows direct connection of 32.768 kHz watch crystal for real-time clock applications. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Rated for −40°C to +105°C ambient operation; validated for automotive cabin, body electronics, and powertrain auxiliary sensing. |
| Digital-controlled oscillator (DCO) | Factory-calibrated to ±3% accuracy at 1 MHz; wakes from LPM3/LPM4 to active mode in <1 µs - critical for event-driven sensor wake-up. |
| Integrated brownout detector | Monitors DVCC and asserts reset if voltage drops below threshold; ensures reliable boot and runtime behavior during automotive load-dump transients. |
| Programmable pull-up/down resistors | Configurable per-pin on P1 and P2; eliminates external bias components for buttons, switches, and open-drain bus interfaces. |
| On-chip emulation logic | Enables full-speed debugging and flash programming via Spy-Bi-Wire using only two pins - reduces development tooling cost and board complexity. |
Applications
| Cabin Occupancy Detection | Tire Pressure Sensor Interface |
|---|---|
|
Use Scenario: Detect seat occupancy via capacitive or resistive sensing elements mounted in vehicle seats. IC Role / Device Role / Timing Role: MSP430G2231IPW4RQ1 acts as the primary signal acquisition and preprocessing unit, sampling analog sensor outputs and performing threshold-based classification. Use Value: Ultra-low standby current (0.5 µA) extends battery life beyond 5 years; integrated ADC and reference eliminate external precision components. |
Use Scenario: Read pressure and temperature data from MEMS sensors in TPMS modules mounted inside tires. IC Role / Device Role / Timing Role: MSP430G2231IPW4RQ1 serves as the sensor hub MCU, acquiring ADC data, applying linearization, and transmitting via RF link using USI-driven SPI to transceiver IC. Use Value: 10-bit ADC autoscan across 8 channels enables simultaneous multi-sensor reading; LPM4 mode minimizes self-heating during sleep intervals. |
| Smart Mirror Ambient Light Control | Door Handle Proximity Sensing |
|
Use Scenario: Adjust mirror dimming level based on ambient light measured by photodiode array near rearview mirror. IC Role / Device Role / Timing Role: MSP430G2231IPW4RQ1 performs analog front-end conditioning, ADC conversion, and PWM generation for electrochromic glass driver. Use Value: Internal VLO and DCO allow seamless clock switching between low-power sensing and active PWM output; no external oscillator needed. |
Use Scenario: Detect hand proximity via capacitive sensing electrodes embedded in door handles to enable passive entry. IC Role / Device Role / Timing Role: MSP430G2231IPW4RQ1 executes capacitive touch measurement using ADC-based charge-transfer method and triggers wake-up on threshold breach. Use Value: Sub-µs wake-up from LPM4 ensures immediate response to user gesture; programmable I/O pull-ups simplify electrode biasing network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2553IPW4RQ1 | 4 KB flash, 512 B RAM, 8-channel ADC, enhanced USI with I²C slave mode; same 14-pin PW package and pinout. | Supports more complex firmware (e.g., BLE stack integration, multi-sensor fusion) without changing PCB layout. | Select when future firmware expansion or additional peripherals (e.g., hardware UART) are anticipated. |
| RL78/F12-CD-14 | 16-bit RL78 core, 16 KB flash, 1.25 KB RAM, 10-bit ADC, LIN interface; 14-pin TSSOP but different pin assignment and voltage range (1.6–5.5 V). | Offers LIN physical layer support for body network integration; wider supply range accommodates unregulated 5 V domains. | Select when LIN bus connectivity or higher memory headroom is required, accepting minor layout revision. |
Compared with MSP430G2231IPW4RQ1, the MSP430G2553IPW4RQ1 provides scalable memory and identical pin compatibility for design evolution, while the RL78/F12-CD-14 offers LIN readiness and broader voltage tolerance at the cost of pin reassignment and toolchain migration.
Availability
MSP430G2231IPW4RQ1 is available at Aetrix Electronics and suitable for automotive cabin sensing, tire pressure monitoring, and smart mirror control requiring stable component supply across extended production lifecycles.
Supply support for MSP430G2231IPW4RQ1 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 focused on analog, embedded processing, and digital signal processing technologies, serving automotive, industrial, and consumer markets.
The MSP430G2xx-Q1 product line delivers ultra-low-power, AEC-Q100 qualified microcontrollers optimized for cost-sensitive automotive sensor nodes, battery-powered telematics, and body electronics with stringent thermal and reliability requirements.
FAQ
What automotive qualification level does the MSP430G2231IPW4RQ1 meet?
The MSP430G2231IPW4RQ1 is AEC-Q100 qualified to Grade 2 (−40°C to +105°C), with full test reports covering HTOL, TC, ESD, and AC/DC parametric validation. This qualification confirms its suitability for non-safety-critical automotive cabin and body electronics applications, including those exposed to under-hood adjacent environments.
Does the MSP430G2231IPW4RQ1 support hardware I²C communication?
Yes, the MSP430G2231IPW4RQ1 supports hardware I²C master mode through its Universal Serial Interface (USI) module. Pins P1.6 (SCL) and P1.7 (SDA) provide dedicated I²C functionality with built-in start/stop detection and clock stretching - no bit-banging or software timers required for standard I²C transactions.
Can the MSP430G2231IPW4RQ1 operate from a single 3.3 V supply?
Yes, the MSP430G2231IPW4RQ1 operates across 1.8 V to 3.6 V, making it fully compatible with standard 3.3 V automotive domains. At 3.3 V, active-mode current increases slightly (to ~270 µA @ 1 MHz), while LPM4 remains at 0.1 µA - preserving battery life in always-on applications.
How is debug and programming implemented on the MSP430G2231IPW4RQ1?
Debug and programming use the 2-wire Spy-Bi-Wire (SBW) interface via pins RST/NMI/SBWTDIO (pin 9) and TEST/SBWTCK (pin 11). This eliminates the need for a 4-pin JTAG header, reducing PCB area and connector cost. TI's MSP-FET and compatible third-party tools support full flash erase, program, and real-time debugging.
What ADC reference options are available on the MSP430G2231IPW4RQ1?
The MSP430G2231IPW4RQ1 supports three ADC reference sources: internal 1.5 V bandgap (VREF+), internal 1.5 V/2 (VREF−), and external reference applied to P1.3 (VREF−) and P1.4 (VREF+). The internal reference enables ratiometric measurements without external components, while external reference allows higher precision or custom scaling.
MSP430G2231IPW4RQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430G2
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430G2231IPW4RQ1 FAQ
1.How can I place an order for MSP430G2231IPW4RQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2231IPW4RQ1 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 MSP430G2231IPW4RQ1 reliable?
The price and inventory of MSP430G2231IPW4RQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2231IPW4RQ1 is usually 5 days.
3.What payment methods are accepted for MSP430G2231IPW4RQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2231IPW4RQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2231IPW4RQ1?
MSP430G2231IPW4RQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2231IPW4RQ1 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 MSP430G2231IPW4RQ1?
For technical support, including MSP430G2231IPW4RQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2231IPW4RQ1 requirements.
6.How does Aetrix verify that MSP430G2231IPW4RQ1 is sourced from the original manufacturer or authorized distributors?
All MSP430G2231IPW4RQ1 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 MSP430G2231IPW4RQ1 meets industry standards.
7.What is the process for return or replacement of MSP430G2231IPW4RQ1?
All MSP430G2231IPW4RQ1 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2231IPW4RQ1, 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 MSP430G2231IPW4RQ1 part is unused and in its original packaging.
Return procedure for MSP430G2231IPW4RQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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