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Texas Instruments MSP430F1232IRHBT
- Part No.:
- MSP430F1232IRHBT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430F1232IRHBT.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:351
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Product details
Overview
MSP430F1232IRHBT 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 USART0 supporting UART/SPI modes. It operates from 1.8 V to 3.6 V and features five power-saving modes, enabling battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F1232IRHBT datasheet, MSP430F1232IRHBT pinout, MSP430F1232IRHBT application, or MSP430F1232IRHBT equivalent, key selection criteria include active-mode current (200 µA @ 1 MHz, 2.2 V), wake-up time (< 6 µs from standby), integrated reference ADC with DTC, and QFN-32 package compatibility for space-constrained designs.
Technical Context
The MSP430F1232IRHBT implements a 16-bit RISC CPU with constant generators and seven addressing modes, achieving 125 ns instruction cycle time. Its basic clock module integrates DCO, 32-kHz crystal support, and selectable ACLK/SMCLK/MCLK sources - enabling rapid low-power mode transitions and precise timing control.
It includes three I/O ports (P1–P3), with P3 providing eight dedicated pins for USART0 (UTXD0/URXD0/SIMO0/SOMI0/UCLK0/STE0) and additional analog inputs (A5–A7). The ADC10 module features internal reference, sample-and-hold, autoscan, and data transfer controller (DTC) for autonomous conversion sequencing without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators for high code efficiency |
| Memory | 8KB flash + 256B RAM + 1KB ROM boot loader; supports in-system programming via BSL or JTAG |
| ADC | 10-bit SAR ADC with 200 ksps sampling, internal reference, autoscan, and DTC for zero-CPU conversion chains |
| Power Modes | Five software-selectable low-power modes; LPM4 draws only 0.1 µA with RAM retention |
| Wake-up Time | < 6 µs from standby mode using DCO - enables responsive event-driven operation in energy harvesting systems |
| Communication | USART0 with hardware UART and SPI support; double-buffered TX/RX channels reduce firmware overhead |
| Supply Range | 1.8 V to 3.6 V - compatible with single-cell Li-ion, coin cell, and regulated 3.3 V rails |
Pinout & Package
Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, with exposed thermal pad connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (XIN) | Clock Input | Input terminal for 32-kHz crystal or external clock source feeding ACLK path |
| 2 (P2.5/ROSC) | DCO Tuning | Connects external resistor to set nominal DCO frequency; critical for fast wake-up stability |
| 3–4, 17, 20, 31 (NC) | No Connect | Not internally bonded; must be tied to VSS to prevent floating and leakage current |
| 5 (RST/NMI) | Reset Input | Active-low reset or non-maskable interrupt input; requires external pull-up for reliable startup |
| 6 (VCC) | Supply Voltage | Main power supply (1.8–3.6 V); decoupling capacitor required within 1 cm of pin |
| 7 (P2.0/ACLK/A0) | Mixed-Signal I/O | Provides ACLK output or analog input A0; shared function requires careful configuration sequencing |
| 29 (TEST) | JTAG Control | Selects JTAG test mode for debugging and programming; must be pulled low during normal operation |
| 30 (VSS) | Ground Reference | Digital ground; connects to exposed QFN pad for thermal and EMI performance |
| 32 (P2.4/TA2/A4/VREF+/VeREF+) | Analog Reference | Positive ADC reference input or analog channel A4; internal VREF+ generation enabled when configured |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-Power Operation | 200 µA active @ 1 MHz/2.2 V; 0.7 µA standby; 0.1 µA off-mode with RAM retention - extends battery life in remote sensors |
| Integrated Analog Front-End | 10-bit ADC with internal reference, sample-and-hold, autoscan, and DTC - eliminates external components for multi-channel sensing |
| Hardware Serial Interface | USART0 with configurable UART/SPI modes and double-buffered TX/RX - reduces ISR latency and firmware complexity |
| Fast Wake-Up Capability | DCO stabilizes in < 6 µs from LPM3/LPM4 - enables duty-cycled operation in wake-on-event applications |
| Secure Flash Programming | Programmable code protection via security fuse and BSL password lock - prevents unauthorized firmware extraction |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via UART-to-LoRa bridge. IC Role / Device Role / Timing Role: Main system controller executing sensor readout, ADC conversion, and serial framing; uses DCO for sub-µs wake-up on timer or GPIO event. Use Value: 0.1 µA off-mode current and 6 µs wake-up enable 10-year battery life with 1-minute sampling intervals. | Use Scenario: Handheld pulse oximeter with analog front-end and OLED display interface. IC Role / Device Role / Timing Role: Signal acquisition controller managing ADC10 autoscan across SpO₂ photodiode channels and driving SPI OLED display. Use Value: Integrated 10-bit ADC with DTC handles concurrent analog sampling and memory storage without CPU load, freeing cycles for real-time saturation calculation. |
| Industrial Data Logger | Smart Utility Meter Interface |
Use Scenario: DIN-rail mounted logger recording voltage/current waveforms at 1 kHz using external op-amps. IC Role / Device Role / Timing Role: Precision timing and control unit synchronizing ADC sampling to line cycle via ACLK from 32-kHz crystal; stores results in flash. Use Value: 32-kHz crystal support and stable ACLK path ensure ±50 ppm timing accuracy over temperature for waveform timestamping. | Use Scenario: Sub-metering module interfacing with metrology IC via SPI and reporting via UART to PLC. IC Role / Device Role / Timing Role: Communication bridge between metrology ASIC and host controller; manages SPI frame timing and UART packetization. Use Value: Hardware USART0 with independent baud rate generator and modulation control (U0MCTL) ensures robust 9600-baud UART link under noisy industrial EMI conditions. |
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 |
|---|---|---|---|
| MSP430F1222IRHBT | 4KB flash (vs. 8KB), identical peripherals, same package and pinout | Suitable for simpler firmware with smaller code footprint; no change to PCB or driver stack | Select when application code size fits in 4KB and cost optimization is prioritized |
| MSP430F2232IRHBT | Enhanced USCI module (USCI_A0 instead of USART0), 16KB flash, 512B RAM, higher max clock (16 MHz) | Supports enhanced UART features (auto-baud, LIN), but requires firmware adaptation for USCI register mapping | Choose for future-proofing or when needing higher throughput, though not drop-in compatible |
Compared with MSP430F1222IRHBT, the MSP430F1232IRHBT provides double flash capacity for complex sensor fusion algorithms; compared with MSP430F2232IRHBT, it offers proven legacy toolchain support and lower power in deep sleep, but lacks USCI enhancements.
Availability
MSP430F1232IRHBT is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply and long-term manufacturability.
Supply support for MSP430F1232IRHBT 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 with emphasis on energy efficiency and system integration.
The MSP430x12x2 product line targets ultralow-power portable measurement and sensing applications, integrating precision analog, intelligent timing, and minimal power consumption into compact mixed-signal MCUs.
FAQ
What is the maximum operating frequency of the MSP430F1232IRHBT?
The MSP430F1232IRHBT does not specify a maximum system clock frequency in its datasheet; it relies on the digitally controlled oscillator (DCO) whose nominal frequency is set by an external resistor on P2.5/ROSC. Typical DCO operation ranges up to ~8 MHz depending on calibration and supply voltage, but the device is characterized for reliable operation at 1 MHz in active mode per the 200 µA specification. Higher frequencies increase current draw and require careful DCO tuning.
Does the MSP430F1232IRHBT support hardware UART with automatic baud rate detection?
No, the MSP430F1232IRHBT's USART0 module does not support automatic baud rate detection. It uses programmable baud rate registers (U0BR0/U0BR1) and modulation control (U0MCTL) for fixed-rate asynchronous UART communication. Auto-baud is available only in later MSP430 generations with USCI modules, not in the x12x2 family.
Can the MSP430F1232IRHBT's ADC10 perform continuous conversions without CPU intervention?
Yes, the MSP430F1232IRHBT's ADC10 module supports fully autonomous operation using its Data Transfer Controller (DTC). When configured with autoscan and DTC enabled, it can sequentially convert multiple analog channels (A0–A7) and store results directly to RAM - all without CPU involvement or interrupt servicing.
Is the MSP430F1232IRHBT pin-compatible with the MSP430F1132IRHBT?
No, the MSP430F1232IRHBT is not pin-compatible with the MSP430F1132IRHBT. While both use the RHB (32-pin QFN) package, the MSP430F1132 belongs to the x11x2 family and lacks Port P3 and USART0 functionality. Pin functions differ significantly - for example, pins 9–16 on RHB are reserved/NC in x11x2 but assigned to P3.0–P3.7 in x12x2.
What debug interfaces are supported by the MSP430F1232IRHBT?
The MSP430F1232IRHBT supports JTAG-based debugging and programming via the TEST, TCK, TMS, TDI, and TDO pins (mapped to P1.x pins). It does not support Spy-Bi-Wire (SBW) in this package variant; SBW is available only on devices with dedicated SBW pins, not on the RHB package where JTAG signals share I/O pins.
MSP430F1232IRHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- 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:
MSP430F1232IRHBT FAQ
1.How can I place an order for MSP430F1232IRHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1232IRHBT 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 MSP430F1232IRHBT reliable?
The price and inventory of MSP430F1232IRHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1232IRHBT is usually 5 days.
3.What payment methods are accepted for MSP430F1232IRHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1232IRHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1232IRHBT?
MSP430F1232IRHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1232IRHBT 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 MSP430F1232IRHBT?
For technical support, including MSP430F1232IRHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1232IRHBT requirements.
6.How does Aetrix verify that MSP430F1232IRHBT is sourced from the original manufacturer or authorized distributors?
All MSP430F1232IRHBT 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 MSP430F1232IRHBT meets industry standards.
7.What is the process for return or replacement of MSP430F1232IRHBT?
All MSP430F1232IRHBT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1232IRHBT, 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 MSP430F1232IRHBT part is unused and in its original packaging.
Return procedure for MSP430F1232IRHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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