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Texas Instruments MSP430G2432IPW20
- Part No.:
- MSP430G2432IPW20
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2432IPW20.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
MSP430G2432IPW20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 16 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, one 16-bit Timer_A with three capture/compare registers, USI supporting SPI and I²C, and up to eight capacitive-touch-enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430G2432IPW20 datasheet, MSP430G2432IPW20 pinout, MSP430G2432IPW20 application, or MSP430G2432IPW20 equivalent, key selection criteria include its 20-pin TSSOP package, integrated ADC10 channel count, Spy-Bi-Wire debug interface, low-power mode timing (sub-1 µs wake-up), and calibrated DCO clock source.
Technical Context
The MSP430G2432IPW20 implements a 16-bit RISC CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one CPU cycle. Its clock system integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (1/8/12/16 MHz), plus LF and ACLK sources for flexible low-power timing.
Peripherals are memory-mapped and accessible via all CPU instructions. The ADC10 module supports autoscan across eight analog inputs with internal reference and DMA-assisted data transfer, while Timer_A3 provides PWM generation, input capture, and interval timing with interrupt support on overflow and each CCR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators for optimized code efficiency |
| Flash / RAM | 16 KB flash memory with in-system programmability via Spy-Bi-Wire; 256 B RAM for data retention in LPM3/LPM4 |
| ADC10 | 10-bit SAR ADC with 8-channel autoscan, internal 1.5 V/2.5 V reference, sample-and-hold, and 200 ksps max sampling rate |
| Timer_A3 | 16-bit timer with three capture/compare registers supporting PWM, input capture, and interval timing with independent interrupt vectors |
| USI Module | Universal Serial Interface configurable as SPI (3-wire or 4-wire) or I²C master/slave, sharing pins with P1.6–P1.7 |
| Power Modes | Five software-selectable low-power modes; LPM4 draws 0.1 µA with RAM retention and sub-1 µs wake-up to active mode |
| Clock Sources | Internal DCO (calibrated at 1/8/12/16 MHz), 32-kHz crystal oscillator, internal VLO, and external digital clock input |
Pinout & Package
Package: 20-pin TSSOP (PW package), 0.65 mm pitch, body size 6.5 × 4.4 mm, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pin 1) | Supply voltage input | Primary digital power rail (1.8–3.6 V); decoupling capacitor required near pin |
| P1.0/TA0CLK/ACLK/A0 (Pin 2) | Multi-function I/O | Configurable as timer clock input, ACLK output, or ADC input A0 - enables synchronized sampling or clock distribution |
| P1.3/ADC10CLK/VREF-/VEREF-/A3 (Pin 5) | ADC control & analog input | Provides ADC conversion clock signal and negative reference; also serves as analog input A3 for differential measurements |
| P1.4/TA0.2/SMCLK/A4/VREF+/VEREF+ (Pin 6) | Multi-function I/O | Supports SMCLK output, Timer_A capture/compare, ADC input A4, and positive reference voltage - critical for precision ADC operation |
| RST/NMI/SBWTDIO (Pin 16) | Reset & debug interface | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data line - enables single-pin programming and debugging |
| TEST/SBWTCK (Pin 17) | Debug clock input | Test mode select and Spy-Bi-Wire clock input - required for fuse programming and secure code protection |
| XIN/P2.6/TA0.1 (Pin 19) | Clock input & timer output | Crystal oscillator input or general-purpose I/O; also functions as Timer_A compare output TA0.1 for PWM generation |
| DVSS (Pin 20) | Digital ground | Reference return path for digital circuitry; must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | Active mode: 220 µA @ 1 MHz, 2.2 V; LPM4: 0.1 µA with RAM retention - extends battery life in coin-cell applications |
| Integrated ADC10 with autoscan | Automatically sequences conversions across up to eight analog inputs without CPU intervention - reduces firmware overhead and power consumption |
| Spy-Bi-Wire debug interface | Two-wire JTAG-compatible interface using RST/NMI and TEST pins - eliminates need for dedicated debug header and saves PCB space |
| Capacitive-touch I/O capability | Individual pin-oscillator enable bits on P1.x allow low-cost touch-button implementation without external components |
| Factory-calibrated DCO | Four DCO frequencies (1/8/12/16 MHz) pre-programmed in information memory - enables precise timing without external crystal in cost-sensitive designs |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via BLE or Sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition (ADC10), low-power scheduling (LPM3/LPM4), and communication protocol stack. Use Value: 0.1 µA LPM4 current enables multi-year operation on CR2032; autoscan ADC reduces CPU wake time by 60% vs. manual polling. | Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and driving OLED display. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized dual-channel ADC sampling and real-time SpO₂ calculation. Use Value: Internal 2.5 V reference ensures ±0.5% ADC accuracy across supply range; 200 ksps sampling captures fast photoplethysmogram waveforms. |
| Smart Energy Meter Interface | Industrial Control Panel |
Use Scenario: Tamper-resistant meter front-end monitoring voltage/current transformers and communicating via RS-485. IC Role / Device Role / Timing Role: Isolated analog interface processor handling isolation barrier timing, calibration storage, and secure firmware updates. Use Value: Brownout detector prevents erratic behavior during brownout events; programmable code protection secures metrology algorithms. | Use Scenario: DIN-rail mounted HMI panel reading rotary encoders, pushbuttons, and driving LED indicators. IC Role / Device Role / Timing Role: Real-time I/O manager with capacitive-touch decoding, encoder quadrature processing, and LED PWM dimming. Use Value: Eight capacitive-touch I/O pins enable direct button sensing; Timer_A3 generates flicker-free 1 kHz LED PWM with hardware dead-time insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2553IPW20 | 24 KB flash, 512 B RAM, enhanced USCI (UART/SPI/I²C), no ADC10 autoscan but added comparator | Requires UART for host communication; higher memory supports larger protocol stacks | Select when needing UART or >16 KB code space; retains same pinout and power profile |
| MSP430FR2433IPW20 | Ferroelectric RAM (6.5 KB FRAM), 2 KB RAM, enhanced ADC with 12-bit option, 20-MHz MCLK | FRAM enables instant write endurance and zero-write-delay logging; higher-speed ADC supports faster sampling | Select for high-cycle data logging or when 12-bit resolution is required; FRAM eliminates flash wear-out concerns |
Compared with MSP430G2432IPW20, the G2553 offers more memory and UART but lacks ADC autoscan, while the FR2433 replaces flash with FRAM and adds 12-bit ADC capability - both require firmware adaptation but share identical 20-pin TSSOP footprint and core peripheral architecture.
Availability
MSP430G2432IPW20 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart energy meter interfaces, and industrial control panels requiring stable component supply and long-term manufacturability.
Supply support for MSP430G2432IPW20 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The MSP430G2xx family delivers ultra-low-power mixed-signal microcontrollers targeting battery-operated sensor systems, portable instrumentation, and energy-harvesting applications where extended runtime and minimal system cost are critical.
FAQ
What is the maximum ADC sampling rate supported by the MSP430G2432IPW20?
The MSP430G2432IPW20 supports a maximum ADC10 sampling rate of 200 ksps. This is achievable when using the internal oscillator as the ADC10CLK source and configuring the ADC10CTL1 register for maximum conversion speed. The actual sustained rate depends on system clock configuration and autoscan channel count - for example, scanning eight channels at 200 ksps yields ~25 ksps per channel. MSP430G2432IPW20's ADC10 module includes sample-and-hold and internal reference to maintain accuracy across this range.
Does the MSP430G2432IPW20 support UART communication?
No, the MSP430G2432IPW20 does not include a hardware UART peripheral. It features a Universal Serial Interface (USI) module that supports only SPI and I²C protocols. For UART functionality, external level-shifting logic or software-based bit-banged UART must be implemented using GPIO and Timer_A. Engineers selecting MSP430G2432IPW20 should verify that their communication requirements align with SPI/I²C - if native UART is essential, alternatives like MSP430G2553IPW20 are recommended.
What debug interface does the MSP430G2432IPW20 use, and how many pins are required?
The MSP430G2432IPW20 uses the two-wire Spy-Bi-Wire (SBW) interface for programming and debugging, requiring only two pins: RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This eliminates the need for a full 4-pin JTAG header, reducing PCB footprint and connector cost. SBW is fully compatible with TI's MSP-FET and LaunchPad development tools, and supports full read/write memory access, breakpoint setting, and real-time variable inspection during execution. MSP430G2432IPW20 does not support standard JTAG.
Can the MSP430G2432IPW20 operate from a 3.3 V supply while maintaining full ADC accuracy?
Yes, the MSP430G2432IPW20 operates across 1.8 V to 3.6 V and maintains full ADC10 specification accuracy at 3.3 V. Its internal 2.5 V reference remains stable over this range, and the ADC10's INL/DNL performance is guaranteed at ±1 LSB across the full supply range. At 3.3 V, the device achieves lower active current (220 µA @ 1 MHz) than at 1.8 V, improving power efficiency in mains-powered or USB-powered applications. MSP430G2432IPW20's brownout detector ensures reliable reset behavior even during supply transients.
How many capacitive-touch I/O pins does the MSP430G2432IPW20 support, and what is required to enable them?
The MSP430G2432IPW20 supports up to eight capacitive-touch enabled I/O pins - all P1.x pins (P1.0–P1.7) - using its integrated pin-oscillator circuitry. To enable capacitive sensing, the corresponding P1SEL.x bit must be cleared (to configure as GPIO), and the P1DIR.x bit set as input; then the P1IES.x and P1IE.x bits configure edge-triggered interrupts, and the pin-oscillator enable bit (in the appropriate register) activates the oscillator. No external components are needed, and the MSP430G2432IPW20's low-noise design allows reliable detection of <0.5 pF capacitance changes.
MSP430G2432IPW20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-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, USI
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 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:
MSP430G2432IPW20 FAQ
1.How can I place an order for MSP430G2432IPW20 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2432IPW20 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 MSP430G2432IPW20 reliable?
The price and inventory of MSP430G2432IPW20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2432IPW20 is usually 5 days.
3.What payment methods are accepted for MSP430G2432IPW20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2432IPW20 transactions.
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4.How is shipping managed for MSP430G2432IPW20?
MSP430G2432IPW20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2432IPW20 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 MSP430G2432IPW20?
For technical support, including MSP430G2432IPW20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2432IPW20 requirements.
6.How does Aetrix verify that MSP430G2432IPW20 is sourced from the original manufacturer or authorized distributors?
All MSP430G2432IPW20 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 MSP430G2432IPW20 meets industry standards.
7.What is the process for return or replacement of MSP430G2432IPW20?
All MSP430G2432IPW20 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2432IPW20, 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 MSP430G2432IPW20 part is unused and in its original packaging.
Return procedure for MSP430G2432IPW20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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