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Texas Instruments MSP430F1232IDWR

Name: MSP430F1232IDWR
Brand: Texas Instruments
SKU: MSP430F1232IDWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430F1232IDWR

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: MSP430F1232IDWR.pdf

Description:: IC MCU 16BIT 8KB FLASH 28SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MSP430F1232IDWR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 8KB flash, 256B RAM, 10-bit ADC, Timer_A3 with three capture/compare registers, and USART0 supporting UART/SPI modes. It operates from 1.8 V to 3.6 V and achieves active-mode current of 200 µA at 1 MHz/2.2 V, enabling battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1232IDWR datasheet, MSP430F1232IDWR pinout, MSP430F1232IDWR application, or MSP430F1232IDWR equivalent, key selection criteria include its 28-pin TSSOP package, integrated DCO wake-up in <6 µs, brownout protection, programmable code security fuse, and dual analog input capability (A0–A7) with internal reference and DTC.

Technical Context

The MSP430F1232IDWR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module supports multiple sources: internal DCO, 32-kHz crystal, high-frequency crystal, resonator, or external clock - all configurable via BCSCTL1/2 and DCOCTL registers.

It integrates three independent I/O ports (P1, P2, P3), where P3 is exclusive to the x12x2 family and provides USART0 signals (UTXD0/URXD0/UCLK0/SIMO0/SOMI0/STE0) and four additional ADC inputs (A5–A7). The ADC10 module features autoscan, sample-and-hold, and data transfer controller (DTC) for autonomous conversion sequences without CPU intervention.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 125 ns instruction cycle time and 16 general-purpose registers for high code efficiency
Memory	8KB + 256B flash program memory and 256B RAM - sufficient for standalone firmware with ADC data buffering and UART protocol stack
ADC Resolution & Speed	10-bit SAR ADC with 200-ksps sampling rate, internal reference, and DTC - enables continuous analog monitoring with DMA-like result handling
Power Modes	Five low-power modes including LPM4 (0.1 µA RAM retention); wake-up from standby in <6 µs via DCO - critical for duty-cycled sensing
Communication	USART0 with software-selectable UART or SPI mode, double-buffered TX/RX - supports host interface or sensor network node communication
Supply Range	1.8 V to 3.6 V operation - compatible with single-cell Li-ion, LiFePO₄, or two-cell alkaline battery systems
Package	28-pin plastic TSSOP (PW), 4.4 mm × 9.7 mm footprint - suitable for space-constrained PCB layouts with hand-soldering capability

Pinout & Package

Package: 28-pin TSSOP (PW), RoHS-compliant, with exposed thermal pad connected to VSS per TI recommendation.

Pin/Terminal	Circuit Role	Design Meaning
1 / TEST	JTAG test mode select	Enables JTAG emulation and programming; must be pulled low during normal operation to avoid unintended debug entry
2 / VCC	Supply voltage input	Primary power rail (1.8–3.6 V); requires local 100 nF ceramic decoupling adjacent to pin
3 / P2.5/ROSC	DCO resistor input	Connects external resistor to set nominal DCO frequency; determines wake-up timing accuracy in low-power modes
4 / VSS	Ground reference	System ground return; ties to thermal pad and all VSS pins for low-impedance path and EMI reduction
5 / XOUT	Crystal oscillator output	Drives 32-kHz watch crystal; requires matching load capacitance per crystal spec for stable ACLK generation
6 / XIN	Crystal oscillator input	Accepts 32-kHz crystal or external clock source; used for precise real-time clock and low-power timing
7 / RST/NMI	Reset or non-maskable interrupt	Pulled high via 47 kΩ resistor; falling edge triggers system reset or NMI service depending on configuration
8 / P2.0/ACLK/A0	ACLK output / ADC channel 0	Provides ACLK signal to peripherals or serves as first analog input; shared function requires careful pinmux control
9 / P2.1/INCLK/A1	Timer_A clock input / ADC channel 1	Accepts external clock for Timer_A or analog input; enables synchronized timing and multi-channel sampling
10 / P2.2/TA0/A2	Timer_A CCI0B input / ADC channel 2	Supports capture of external events while simultaneously acquiring analog data - useful for time-stamped measurements
11 / P3.0/STE0/A5	USART0 slave transmit enable / ADC channel 5	Enables SPI slave mode or adds fifth ADC input; dual use requires runtime reconfiguration in mixed-mode applications
12 / P3.1/SIMO0	USART0 SPI master-out/slave-in	Full-duplex SPI data line; supports daisy-chained sensor interfaces or flash memory programming
13 / P3.2/SOMI0	USART0 SPI master-in/slave-out	Receives SPI data from peripheral; complements SIMO0 for bidirectional serial communication
14 / P3.3/UCLK0	USART0 clock input/output	Provides SPI clock (master) or accepts external clock (slave); enables synchronous data exchange with precise timing
15 / P3.4/UTXD0	USART0 UART transmit	Drives asynchronous serial data; supports baud rates up to 115.2 kbps with software-configurable modulation
16 / P3.5/URXD0	USART0 UART receive	Accepts asynchronous serial data; includes noise filtering and start-bit detection for robust host communication
17 / P3.6/A6	ADC channel 6	Extends analog input count to seven channels (A0–A7); supports differential or single-ended acquisition with internal VREF
18 / P3.7/A7	ADC channel 7	Final dedicated ADC input; enables simultaneous multi-sensor readout (e.g., temperature, humidity, voltage)
19 / P2.3/TA1/A3/VREF−	Timer_A CCI1B / ADC channel 3 / ADC negative reference	Shared pin supports timer capture, analog input, and VREF− - requires careful sequencing to avoid conflict during ADC calibration
20 / P2.4/TA2/A4/VREF+	Timer_A CCI2B / ADC channel 4 / ADC positive reference	Enables internal 1.5V/2.5V reference or external VREF+ sourcing; sets full-scale range for all ADC channels
21 / P1.0/TACLK/ADC10CLK	Timer_A clock input / ADC conversion clock	Routes SMCLK or external signal to both Timer_A and ADC10CLK - ensures synchronized timing between event capture and sampling
22 / P1.1/TA0	Timer_A CCI0A input / BSL transmit	Serves as primary capture input or bootloader TX pin; critical for field firmware updates over UART
23 / P1.2/TA1	Timer_A CCI1A input	Second capture input for pulse-width or period measurement; supports quadrature decoding with P1.3
24 / P1.3/TA2	Timer_A CCI2A input	Third capture input; enables three-phase motor control feedback or multi-event timestamping
25 / P1.4/SMCLK/TCK	Sub-main clock output / JTAG test clock	Exports SMCLK for peripheral synchronization or acts as TCK during programming - multiplexed but not concurrent
26 / P1.5/TA0/TMS	Timer_A compare output / JTAG test mode select	Drives PWM output or selects JTAG state; requires pull-up when unused to prevent floating TMS during debug
27 / P1.6/TA1/TDI/TCLK	Timer_A compare output / JTAG test data input	Delivers PWM or accepts JTAG data; TDI function active only when TEST=low and device in JTAG mode
28 / P1.7/TA2/TDO/TDI	Timer_A compare output / JTAG test data output/input	Provides PWM or JTAG data I/O; TDO/TDI selection controlled by JTAG instruction - avoids bus contention

Key Features

Feature	Design Value
Ultralow-power operation	0.1 µA off-mode current with RAM retention enables >10-year battery life in coin-cell-powered IoT endpoints
Digital-controlled oscillator (DCO)	Wake-up from LPM4 to active mode in <6 µs - eliminates latency in responsive sensor wake-on-event designs
Integrated USART0	Hardware UART/SPI reduces CPU overhead for serial communication, freeing cycles for signal processing or encryption
ADC10 with DTC	Autoscan across A0–A7 with automatic memory storage eliminates polling/interrupt servicing - ideal for periodic sensor logging
Programmable code protection	Security fuse prevents flash readout - protects proprietary algorithms and calibration data in deployed devices
Supply voltage brownout protection	Prevents erratic operation during battery sag or power ramp-up - ensures reliable reset before firmware execution

Applications

Wireless Sensor Node	Glass Breakage Detector
Use Scenario: Battery-powered environmental monitor transmitting temperature, humidity, and motion data via UART to BLE gateway. IC Role / Device Role / Timing Role: Primary MCU executing sensor polling, ADC conversion, data formatting, and UART transmission; DCO provides fast wake-up for scheduled readings. Use Value: 0.7 µA standby current extends CR2032 battery life beyond 2 years; integrated USART0 eliminates external level shifter.	Use Scenario: Standalone acoustic detector analyzing window vibration signatures using wave digital filter algorithm. IC Role / Device Role / Timing Role: Real-time signal processor capturing analog audio via ADC10, executing 16-bit RISC FFT routines, and triggering alarm on pattern match. Use Value: 16-bit CPU performance enables efficient fixed-point math; 200-ksps ADC captures transient breakage waveform without aliasing.
Portable Medical Meter	Industrial Data Logger
Use Scenario: Handheld blood glucose meter with LCD display, button interface, and USB-to-UART bridge. IC Role / Device Role / Timing Role: System controller managing electrochemical sensor interface, LCD driver timing, button debouncing, and UART host communication. Use Value: 8KB flash stores calibration tables and firmware; brownout protection prevents corrupted readings during low-battery operation.	Use Scenario: Ruggedized field logger recording voltage, current, and temperature every 10 seconds onto SD card via SPI. IC Role / Device Role / Timing Role: Data acquisition engine performing autoscan ADC on six channels, storing results in RAM, and initiating SPI writes during idle periods. Use Value: DTC automates ADC result transfers to buffer memory; P3.0–P3.3 provide dedicated SPI interface without GPIO bit-banging.

Wireless Sensor Node

Glass Breakage Detector

Use Scenario: Battery-powered environmental monitor transmitting temperature, humidity, and motion data via UART to BLE gateway.

IC Role / Device Role / Timing Role: Primary MCU executing sensor polling, ADC conversion, data formatting, and UART transmission; DCO provides fast wake-up for scheduled readings.

Use Value: 0.7 µA standby current extends CR2032 battery life beyond 2 years; integrated USART0 eliminates external level shifter.

Use Scenario: Standalone acoustic detector analyzing window vibration signatures using wave digital filter algorithm.

IC Role / Device Role / Timing Role: Real-time signal processor capturing analog audio via ADC10, executing 16-bit RISC FFT routines, and triggering alarm on pattern match.

Use Value: 16-bit CPU performance enables efficient fixed-point math; 200-ksps ADC captures transient breakage waveform without aliasing.

Portable Medical Meter

Industrial Data Logger

Use Scenario: Handheld blood glucose meter with LCD display, button interface, and USB-to-UART bridge.

IC Role / Device Role / Timing Role: System controller managing electrochemical sensor interface, LCD driver timing, button debouncing, and UART host communication.

Use Value: 8KB flash stores calibration tables and firmware; brownout protection prevents corrupted readings during low-battery operation.

Use Scenario: Ruggedized field logger recording voltage, current, and temperature every 10 seconds onto SD card via SPI.

IC Role / Device Role / Timing Role: Data acquisition engine performing autoscan ADC on six channels, storing results in RAM, and initiating SPI writes during idle periods.

Use Value: DTC automates ADC result transfers to buffer memory; P3.0–P3.3 provide dedicated SPI interface without GPIO bit-banging.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultralow-power mixed-signal microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430F1222IDWR	4KB flash, same 256B RAM, identical peripherals and pinout	Limited firmware complexity; insufficient for applications requiring >4KB code (e.g., full USB stack or advanced crypto)	Select when cost sensitivity outweighs code size needs and no future firmware expansion is planned
MSP430F1232IPW	Identical electrical specs and functionality; differs only in 28-pin TSSOP (PW) vs. 28-pin SOWB (DW) package	TSSOP offers better manufacturability and thermal performance than SOWB; SOWB may suit legacy board reuse	Choose MSP430F1232IPW for new designs requiring standard surface-mount assembly and improved thermal dissipation

Compared with MSP430F1232IDWR, the F1222IDWR reduces flash capacity by 50% but maintains identical low-power behavior and peripheral set, while the F1232IPW delivers identical functionality in a more widely supported TSSOP package - making it preferable for volume production and automated assembly.

Availability

MSP430F1232IDWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical meters, industrial data loggers, and acoustic event detectors requiring stable component supply and long-term lifecycle support.

Supply support for MSP430F1232IDWR 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 low-power design and industrial-grade reliability.

The MSP430F1232IDWR belongs to the MSP430x12x2 ultralow-power mixed-signal microcontroller product line, engineered for extended battery life in portable measurement, sensor interface, and energy-harvesting applications.

FAQ

What is the maximum ADC sampling rate of the MSP430F1232IDWR?

The MSP430F1232IDWR features a 10-bit ADC10 module rated at 200 ksps (kilo-samples per second). This maximum rate assumes optimal conditions: internal reference enabled, sample-and-hold active, and minimal conversion setup overhead. In practice, sustained throughput depends on clock source stability and DTC configuration - the MSP430F1232IDWR achieves this rate using SMCLK-derived ADC10CLK with proper prescaling.

Does the MSP430F1232IDWR support hardware UART communication?

Yes, the MSP430F1232IDWR includes USART0, a hardware peripheral that supports asynchronous UART mode. Pins P3.4 (UTXD0) and P3.5 (URXD0) are dedicated to transmit and receive functions, respectively. The MSP430F1232IDWR allows baud rate configuration via U0BR0/U0BR1 and modulation control through U0MCTL, enabling standard rates such as 9600 or 115200 bps without CPU bit-banging.

What package type is used for the MSP430F1232IDWR?

The MSP430F1232IDWR is packaged in a 28-pin plastic TSSOP (Thin Shrink Small Outline Package), designated by the suffix "PW" in TI's ordering nomenclature. This package measures 4.4 mm × 9.7 mm with 0.65 mm lead pitch and includes an exposed thermal pad recommended for connection to VSS to enhance thermal performance and reduce junction temperature during sustained operation.

How many analog input channels does the MSP430F1232IDWR support?

The MSP430F1232IDWR supports eight analog input channels (A0 through A7), accessible via P2.0, P2.1, P2.2, P2.3, P2.4, P3.0, P3.6, and P3.7. All channels share the 10-bit ADC10 module and can be scanned automatically using the autoscan feature. Internal reference voltages (VREF+/VREF−) are available on P2.4 and P2.3, enabling ratiometric or absolute measurements without external components.

Can the MSP430F1232IDWR operate from a single 1.8-V supply?

Yes, the MSP430F1232IDWR is fully specified to operate across a supply range of 1.8 V to 3.6 V. At 1.8 V, it maintains full functionality including flash programming, ADC operation, and USART0 communication - though maximum CPU frequency is reduced per datasheet limits. Its ultralow-power design ensures stable 200 µA active-mode current at 1 MHz and 2.2 V, scaling predictably downward at lower voltages.

MSP430F1232IDWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Series:: MSP430x1xx

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: MSP430 CPU16

Core Size:: 16-Bit

Speed:: 8MHz

Connectivity:: SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 22

Program Memory Size:: 8KB (8K x 8 + 256B)

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:

MSP430F1232IDWR FAQ

1.How can I place an order for MSP430F1232IDWR through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430F1232IDWR 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 MSP430F1232IDWR reliable?

The price and inventory of MSP430F1232IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1232IDWR is usually 5 days.

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MSP430F1232IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430F1232IDWR 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 MSP430F1232IDWR?

For technical support, including MSP430F1232IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1232IDWR requirements.

6.How does Aetrix verify that MSP430F1232IDWR is sourced from the original manufacturer or authorized distributors?

All MSP430F1232IDWR 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 MSP430F1232IDWR meets industry standards.

7.What is the process for return or replacement of MSP430F1232IDWR?

All MSP430F1232IDWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1232IDWR, 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 MSP430F1232IDWR part is unused and in its original packaging.

Return procedure for MSP430F1232IDWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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