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Texas Instruments MSP430G2332IPW20
- Part No.:
- MSP430G2332IPW20
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2332IPW20.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,665
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Product details
Overview
MSP430G2332IPW20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin TSSOP package, featuring 8 KB flash, 256 B RAM, 10-bit 200-ksps ADC with internal reference and autoscan, one 16-bit Timer_A with three capture/compare registers, USI supporting SPI/I²C, and capacitive-touch-enabled I/O. It targets battery-powered sensor nodes and portable measurement systems requiring sub-1-µs wake-up and <0.1 µA off-mode current.
For engineers reviewing the MSP430G2332IPW20 datasheet, MSP430G2332IPW20 pinout, MSP430G2332IPW20 application, or MSP430G2332IPW20 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in TI's SLAS723H specification and functional block diagrams.
Technical Context
The MSP430G2332IPW20 implements a 16-bit CPU with seven addressing modes and 51-instruction set, executing register-to-register operations in one CPU cycle. Its clock system integrates DCO (calibrated at 1/8/12/16 MHz), LF oscillator, and 32-kHz crystal support, enabling dynamic low-power mode selection (LPM0–LPM4) with sub-1-µs wake-up from standby.
Peripherals include Timer_A3 with three CC registers for PWM and capture, USI for hardware SPI/I²C with SDO/SDI/SCL/SDA mapping on P1.6–P1.7, and ADC10 with eight analog inputs (A0–A7), internal VREF+/VREF−, and DMA-assisted autoscan - all confirmed for MSP430G2x32 series only per Table 1 and functional block diagram.
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 | 8 KB flash memory (512-byte segments) + 256 B RAM; supports in-system programming via Spy-Bi-Wire and calibrated DCO calibration data in Info Memory Segment A. |
| ADC10 | 10-bit SAR ADC with 200 ksps sampling rate, internal 1.5/2.5 V reference, sample-and-hold, autoscan, and eight-channel input (A0–A7); eliminates external ADC in sensor front-ends. |
| Power Modes | Five low-power modes: LPM4 draws 0.1 µA (RAM retention); active mode consumes 220 µA at 1 MHz/2.2 V; wake-up time <1 µs from standby. |
| USI Interface | Universal Serial Interface supporting master/slave SPI and I²C protocols; uses P1.6 (SDO/SCL) and P1.7 (SDI/SDA) with dedicated control registers (USICTL0/1, USICKCTL). |
| Timer_A3 | 16-bit Timer_A with three capture/compare registers (TACCR0–2); supports PWM generation, input capture, interval timing, and interrupt on overflow/CC event. |
| Supply Range | 1.8 V to 3.6 V operation; absolute max rating −0.3 V to 4.1 V on VCC–VSS; enables direct Li-ion or coin-cell battery integration without regulation. |
Pinout & Package
Package: 20-pin TSSOP (PW), 0.65 mm pitch, body size 6.5 × 4.4 mm, JEDEC MO-153 compliant. Thermal pad not present; no exposed die attach pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DVCC) | Digital supply voltage | Primary 1.8–3.6 V power rail for CPU, RAM, and digital I/O; requires local 100 nF decoupling. |
| 2 (P1.0/TA0CLK/ACLK/A0) | Multi-function I/O | Configurable as GPIO, Timer_A clock input, ACLK output, or ADC channel A0 - selected via P1SEL/P1DIR registers. |
| 5 (P1.3/ADC10CLK/VREF−/VEREF−/A3) | ADC reference & analog input | Provides ADC negative reference (VREF−) and analog input A3; must be externally bypassed when used as reference. |
| 6 (P1.4/TA0.2/SMCLK/A4/VREF+/VEREF+/TCK) | Multi-function I/O | Serves as SMCLK output, ADC channel A4, positive reference (VREF+), or JTAG test clock - function determined by module enable bits. |
| 16 (RST/NMI/SBWTDIO) | Reset & debug interface | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data line; requires 47 kΩ pull-up for reliable reset. |
| 17 (TEST/SBWTCK) | Debug clock input | Test mode select during programming; provides Spy-Bi-Wire clock (SBWTCK) for in-circuit debugging and flash programming. |
| 19 (XIN/P2.6/TA0.1) | Clock input & timer output | Crystal oscillator input (XIN) or GPIO/timer compare output (TA0.1); internal load caps enabled only when XIN/XOUT pair used. |
| 20 (DVSS) | Digital ground | Dedicated digital ground return; must be connected to system GND plane with low-inductance path to minimize noise coupling into ADC. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive-touch I/O | Up to 16 pins support pin-oscillator-based touch sensing (P1.0–P1.7, P2.0–P2.5); requires no external components and enables wake-on-touch in LPM4. |
| Brownout detector | Integrated POR/BOR circuit ensures reliable reset across 1.8–3.6 V supply range; prevents code corruption during brownout or power ramp. |
| On-chip emulation | Spy-Bi-Wire interface (2-wire JTAG) enables full-speed debugging, flash programming, and real-time variable inspection without external emulator. |
| Programmable security | Flash protection fuse prevents unauthorized read-out; once blown, flash contents are inaccessible - critical for firmware IP protection. |
| Low-frequency oscillator | Internal VLO runs at ~12 kHz without external components; supplies ACLK in LPM3/LPM4 for RTC or periodic wake-up while consuming <1 µA. |
Applications
| Smart Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART or RF link every 30 seconds. IC Role / Device Role / Timing Role: MSP430G2332IPW20 acts as main controller, ADC front-end, and low-power scheduler - using LPM4 between readings and Timer_A for precise interval timing. Use Value: 0.1 µA off-mode current extends CR2032 battery life beyond 5 years; integrated ADC and USI eliminate 3 external ICs. |
Use Scenario: Wearable pulse oximeter acquiring analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: MSP430G2332IPW20 performs synchronized dual-channel ADC sampling (A0/A1), digital filtering, and LED drive timing via Timer_A PWM outputs. Use Value: 200-ksps ADC captures fast photoplethysmogram transients; internal 2.5 V reference ensures stable gain across temperature. |
| Industrial Control Panel | Energy Harvesting Node |
Use Scenario: DIN-rail mounted HMI with capacitive buttons, LED indicators, and RS-485 communication. IC Role / Device Role / Timing Role: MSP430G2332IPW20 serves as touch controller, LED driver (PWM via TA0.0–TA0.2), and RS-485 interface manager using USI in SPI mode with external transceiver. Use Value: 16 capacitive-touch I/O pins replace mechanical switches and reduce BOM cost; USI handles SPI protocol without CPU overhead. |
Use Scenario: Solar-powered environmental monitor harvesting microwatts from small PV cell and storing energy in supercapacitor. IC Role / Device Role / Timing Role: MSP430G2332IPW20 manages energy budget, wakes periodically via VLO-driven RTC, samples sensors, and transmits via sub-GHz radio. Use Value: Sub-1-µs wake-up minimizes active time; LPM4 + VLO allows 1-second wake intervals with average current <2 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2432IPW20 | Same package and pinout; adds 8-channel ADC input (vs. 4 on G2332) and doubles RAM to 512 B. | Required when >4 analog sensor channels or larger firmware buffers needed; identical power/performance profile otherwise. | Select G2432IPW20 if future ADC channel expansion or enhanced data logging is anticipated; no PCB change required. |
| MSP430FR2355IPW20 | Ferroelectric RAM (64 KB FRAM + 2 KB SRAM), higher 16-MHz max CPU speed, enhanced analog (12-bit ADC, op-amps), but 2.5–3.6 V supply only. | Enables real-time data buffering and analog signal conditioning; unsuitable for 1.8 V operation or legacy code porting without validation. | Choose FR2355IPW20 for new designs needing FRAM endurance or analog front-end integration; verify supply compatibility first. |
Compared with MSP430G2432IPW20, the MSP430G2332IPW20 offers lower-cost entry with sufficient ADC channels for basic sensing; versus MSP430FR2355IPW20, it delivers proven 1.8 V operation and simpler migration from legacy MSP430G2xx codebases.
Availability
MSP430G2332IPW20 is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430G2332IPW20 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 design.
The MSP430G2xx family was engineered specifically for battery-constrained applications demanding nanowatt-level sleep currents, fast wake-up, and integrated analog peripherals - targeting sensor, metering, and portable instrumentation markets.
FAQ
What is the maximum ADC sampling rate supported by the MSP430G2332IPW20?
The MSP430G2332IPW20 supports a maximum ADC10 sampling rate of 200 ksps under specified conditions (VCC ≥ 2.2 V, ADC10CLK = 5 MHz). This rate is achievable with internal reference and autoscan enabled, and is documented in the SLAS723H datasheet Section 6.1. The actual sustained rate depends on conversion configuration, reference source, and CPU overhead for result handling.
Does the MSP430G2332IPW20 support hardware I²C communication?
Yes, the MSP430G2332IPW20 supports hardware I²C via its Universal Serial Interface (USI) module. Pins P1.6 (SCL) and P1.7 (SDA) are dedicated for I²C operation when USICTL1.SPIEN = 0 and USICTL0.STT = 1. The USI handles start/stop conditions, ACK/NACK, and clock stretching autonomously - confirmed in Section 12 of SLAS723H.
What are the valid supply voltage ranges for programming and operating the MSP430G2332IPW20?
The MSP430G2332IPW20 operates from 1.8 V to 3.6 V during normal program execution. For flash memory programming via Spy-Bi-Wire, the supply voltage must be within 2.2 V to 3.6 V - as specified in the "Recommended Operating Conditions" table of SLAS723H. Operation below 2.2 V disables flash write/erase capability.
How many capacitive-touch I/O pins does the MSP430G2332IPW20 support?
The MSP430G2332IPW20 supports up to 16 capacitive-touch enabled I/O pins: P1.0 through P1.7 and P2.0 through P2.5. Each pin can be individually configured for touch sensing using the built-in pin-oscillator circuitry, with no external components required - a feature explicitly listed in the "Features" section of SLAS723H.
Is the MSP430G2332IPW20 pin-compatible with other devices in the MSP430G2xx family?
The MSP430G2332IPW20 is pin-compatible with other 20-pin TSSOP variants in the G2xx family (e.g., MSP430G2432IPW20, MSP430G2232IPW20), sharing identical pin numbering and core peripheral mappings. However, ADC channel count, RAM size, and flash capacity differ - requiring firmware validation but no PCB redesign when upgrading within the same PW20 footprint.
MSP430G2332IPW20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430G2xx
- Packaging:
- Tube
- 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:
- 4KB (4K 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:
MSP430G2332IPW20 FAQ
1.How can I place an order for MSP430G2332IPW20 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2332IPW20 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 MSP430G2332IPW20 reliable?
The price and inventory of MSP430G2332IPW20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2332IPW20 is usually 5 days.
3.What payment methods are accepted for MSP430G2332IPW20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2332IPW20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2332IPW20?
MSP430G2332IPW20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2332IPW20 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 MSP430G2332IPW20?
For technical support, including MSP430G2332IPW20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2332IPW20 requirements.
6.How does Aetrix verify that MSP430G2332IPW20 is sourced from the original manufacturer or authorized distributors?
All MSP430G2332IPW20 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 MSP430G2332IPW20 meets industry standards.
7.What is the process for return or replacement of MSP430G2332IPW20?
All MSP430G2332IPW20 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2332IPW20, 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 MSP430G2332IPW20 part is unused and in its original packaging.
Return procedure for MSP430G2332IPW20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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