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Texas Instruments MSP430F1232IPW
- Part No.:
- MSP430F1232IPW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F1232IPW.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
MSP430F1232IPW from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 8KB flash, 256B RAM, 10-bit 200-ksps ADC, Timer_A3 with three capture/compare registers, and integrated 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 instrumentation.
For engineers reviewing the MSP430F1232IPW datasheet, MSP430F1232IPW pinout, MSP430F1232IPW application, or MSP430F1232IPW equivalent, key selection criteria include its 28-pin TSSOP package, 6 µs wake-up from standby, brownout protection, programmable code security fuse, and dual analog input capability across eight ADC channels (A0–A7).
Technical Context
The MSP430F1232IPW implements a 16-bit CPU with constant generators and seven addressing modes, executing register operations in one CPU clock cycle. Its basic clock module integrates DCO, 32-kHz crystal support, and selectable high-frequency crystal or external clock sources - enabling sub-6 µs wake-up and five configurable low-power modes (LPM0–LPM4).
Peripheral integration includes a 10-bit SAR ADC with internal reference, sample-and-hold, autoscan, and Data Transfer Controller (DTC); USART0 with double-buffered TX/RX for UART or SPI; and three-port I/O (P1, P2, P3) with edge-selectable interrupts on P1/P2. Port P3 (8 pins) and USART0 are exclusive to the MSP430x12x2 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators; enables single-cycle register operations and high code efficiency. |
| Memory | 8KB + 256B flash program memory and 256B RAM; supports in-system programming via BSL or JTAG without external voltage. |
| ADC Performance | 10-bit SAR ADC with 200 ksps sampling rate, internal reference, autoscan, and DTC - allows autonomous multi-channel conversion without CPU intervention. |
| Power Modes | Five software-selectable low-power modes; standby mode draws 0.7 µA and off mode (RAM retention) draws 0.1 µA - extends battery life in intermittent-sensing applications. |
| Wake-Up Time | <6 µs from standby to active mode via DCO stabilization - critical for responsive event-driven systems like alarm triggers or RF wake-on-rx. |
| Communication | USART0 with software-selectable UART or SPI; supports full-duplex serial communication using P3.1–P3.5 pins - eliminates need for external transceivers in simple wired sensor links. |
| Supply Range | 1.8 V to 3.6 V operation - compatible with single-cell Li-ion, two-cell alkaline, or regulated 3.3 V rails without level-shifting. |
Pinout & Package
Package: 28-pin plastic TSSOP (PW), body size 9.7 mm × 4.4 mm, 0.65 mm pitch. Thermal pad recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK/ADC10CLK | Timer_A clock input / ADC conversion clock | Configurable as external timer clock source or ADC sampling trigger; enables synchronous timing control across peripherals. |
| P2.3/TA1/A3/VREF− | Analog input / Timer_A capture/compare / ADC negative reference | Shared function pin supporting differential ADC measurements when paired with P2.4/VREF+, reducing component count in precision sensing. |
| P3.4/UTXD0 | USART0 transmit data output | Dedicated UART TX line for direct connection to host MCU or RS-232 level shifter; supports asynchronous full-duplex communication. |
| P3.5/URXD0 | USART0 receive data input | Dedicated UART RX line with noise filtering; enables robust firmware updates or sensor data streaming over serial interface. |
| RST/NMI | Reset or nonmaskable interrupt input | Active-low pin that initiates power-on reset or captures critical fault events (e.g., oscillator failure) with highest priority interrupt vector. |
| XIN / XOUT | Crystal oscillator input / output | Supports 32.768 kHz watch crystal for real-time clock functions or high-frequency crystals up to 8 MHz - provides stable timing for ADC sampling or UART baud generation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-Power Operation | 0.1 µA off-mode current with RAM retention enables multi-year battery life in wireless sensor endpoints using coin cells. |
| Integrated Analog Front-End | Eight ADC input channels (A0–A7), internal reference, and autoscan allow sequential measurement of multiple sensors without external multiplexers or references. |
| Hardware Serial Interface | USART0 with independent TX/RX buffers and programmable baud rate supports reliable firmware updates and telemetry transmission without CPU polling overhead. |
| JTAG + BSL Programming | On-chip bootstrap loader accessible via UART (P1.1/P2.2) eliminates need for dedicated debug hardware during field firmware upgrades. |
| Code Security | Programmable security fuse prevents unauthorized read-out of flash contents - essential for protecting proprietary algorithms in deployed devices. |
Applications
| Wireless Sensor Node | Portable Medical Instrument |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data every 30 seconds via UART to BLE gateway. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, data formatting, low-power scheduling, and USART transmission. Use Value: 0.7 µA standby current and 6 µs wake-up minimize energy per measurement cycle, extending CR2032 battery life beyond 2 years. | Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: Signal acquisition processor handling 10-bit ADC sampling at 200 ksps, digital filtering, and display interface control. Use Value: Integrated DTC automates ADC result storage to RAM, freeing CPU for algorithm execution while maintaining deterministic sampling intervals. |
| Industrial Control Panel | Smart Utility Meter |
Use Scenario: Local HMI panel monitoring relay status, reading potentiometer inputs, and driving LED indicators in factory equipment. IC Role / Device Role / Timing Role: Embedded controller interfacing with discrete I/O, analog sensors, and user interface elements via P1/P2/P3 ports. Use Value: 24 GPIO pins (including 8-bit P1, 6-bit P2, 8-bit P3) provide sufficient routing for mixed-signal control without external expanders. | Use Scenario: Sub-metering module measuring voltage/current waveforms and logging data to EEPROM over long intervals. IC Role / Device Role / Timing Role: Data acquisition engine performing synchronized analog sampling, timestamping via ACLK, and secure local storage. Use Value: Brownout protection and supply voltage monitoring ensure reliable operation during grid fluctuations, preventing corrupted metering data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F1222IPW | 4KB flash (vs. 8KB), identical peripherals, same 28-pin TSSOP package and pinout. | Suitable for simpler firmware with smaller code footprint; lacks headroom for complex protocol stacks or future feature expansion. | Select when application code size remains under 3.5 KB and no planned firmware growth is expected. |
| MSP430F1232IRHB | Identical core specs but in 32-pin QFN (RHB) package with exposed thermal pad; adds NC and reserved pins not present in PW. | Better thermal performance and higher I/O density; requires PCB redesign due to different footprint and soldering process. | Choose for space-constrained designs needing improved thermal dissipation or additional routing flexibility. |
Compared with MSP430F1222IPW, the MSP430F1232IPW provides double the flash for larger firmware or bootloader+application separation; compared with MSP430F1232IRHB, it offers drop-in compatibility for TSSOP-based legacy layouts while sacrificing thermal pad benefits.
Availability
MSP430F1232IPW is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical instruments, and industrial control panels requiring stable component supply and long-term manufacturability.
Supply support for MSP430F1232IPW 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 microcontroller innovation.
The MSP430x12x2 product line was designed for ultralow-power mixed-signal applications demanding extended battery life, integrated analog peripherals, and rapid wake-up response - targeting portable instrumentation, sensor networks, and energy-conscious industrial systems.
FAQ
What is the maximum ADC sampling rate supported by the MSP430F1232IPW?
The MSP430F1232IPW features a 10-bit successive approximation register (SAR) ADC capable of 200 ksamples per second (ksps). This maximum rate assumes optimal clock configuration and minimal overhead from autoscan or DTC usage. At lower rates, the ADC supports internal reference, sample-and-hold, and automatic channel sequencing - all fully functional in the MSP430F1232IPW without external components.
Does the MSP430F1232IPW support UART communication natively?
Yes, the MSP430F1232IPW includes USART0, a hardware peripheral that supports both asynchronous UART and synchronous SPI protocols. UART mode uses P3.4 (UTXD0) and P3.5 (URXD0) pins and is enabled via UTXE0/URXE0 bits in module enable registers. This functionality is confirmed for the MSP430x12x2 family and is fully implemented in the MSP430F1232IPW.
What package type is used for the MSP430F1232IPW?
The MSP430F1232IPW uses a 28-pin plastic thin-shrink small-outline package (TSSOP), designated by the suffix "PW". Its dimensions are 9.7 mm × 4.4 mm with 0.65 mm lead pitch. The thermal pad on the underside must be connected to VSS for optimal thermal performance and electrical stability.
How many I/O pins does the MSP430F1232IPW provide?
The MSP430F1232IPW provides 24 usable GPIO pins: 8-bit Port 1 (P1.0–P1.7), 6-bit Port 2 (P2.0–P2.5), and 8-bit Port 3 (P3.0–P3.7). Two pins (RST/NMI and TEST) are dedicated control inputs, and XIN/XOUT are oscillator-specific. All GPIO pins support individual direction control, interrupt capability (on P1/P2), and peripheral multiplexing as documented in the MSP430F1232IPW terminal functions table.
Is the MSP430F1232IPW pin-compatible with other MSP430x12x2 devices in TSSOP packages?
Yes, the MSP430F1232IPW shares identical pinout and electrical characteristics with other 28-pin TSSOP MSP430x12x2 variants including MSP430F1222IPW. Pin assignments for P1, P2, P3, power, reset, and oscillator signals match exactly - enabling direct substitution where flash size requirements permit, without PCB layout changes.
MSP430F1232IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430x1xx
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- 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:
MSP430F1232IPW FAQ
1.How can I place an order for MSP430F1232IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1232IPW 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 MSP430F1232IPW reliable?
The price and inventory of MSP430F1232IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1232IPW is usually 5 days.
3.What payment methods are accepted for MSP430F1232IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1232IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1232IPW?
MSP430F1232IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1232IPW 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 MSP430F1232IPW?
For technical support, including MSP430F1232IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1232IPW requirements.
6.How does Aetrix verify that MSP430F1232IPW is sourced from the original manufacturer or authorized distributors?
All MSP430F1232IPW 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 MSP430F1232IPW meets industry standards.
7.What is the process for return or replacement of MSP430F1232IPW?
All MSP430F1232IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1232IPW, 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 MSP430F1232IPW part is unused and in its original packaging.
Return procedure for MSP430F1232IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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