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Texas Instruments MSP430F1232CY
- Part No.:
- MSP430F1232CY
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- Die
- Datasheet:
-
MSP430F1232CY.pdf
- Description:
- IC MCU 16BIT 8KB FLASH DIESALE
- Quantity:
- Payment:
- Shipping:
Inventory:3,791
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Product details
Overview
MSP430F1232CY from Texas Instruments is an ultralow-power 16-bit RISC microcontroller featuring 8KB flash, 256B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, 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 - ideal for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F1232CY datasheet, MSP430F1232CY pinout, MSP430F1232CY application, or MSP430F1232CY equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases in RF sensing and glass-break detection, and two validated alternative MCUs with documented functional and interface differences.
Technical Context
The MSP430F1232CY implements a 16-bit RISC CPU with 125 ns instruction cycle time, constant generators for code efficiency, and five software-selectable low-power modes - including LPM4 with 0.1 µA off-mode (RAM retention). Its basic clock module integrates DCO, 32-kHz crystal support, and external resistor tuning via P2.5/ROSC.
It features three I/O ports (P1–P3), with P3 providing dedicated USART0 pins (UTXD0/URXD0/UCLK0/SIMO0/SOMI0/STE0) and seven analog inputs (A0–A7). The ADC10 includes integrated reference, sample-and-hold, and data transfer controller (DTC) enabling autonomous conversions without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125 ns instruction cycle; enables deterministic timing for real-time signal analysis. |
| Flash / RAM | 8 KB flash + 256 B RAM; sufficient for firmware with ADC-driven DTC routines and UART-based telemetry. |
| ADC Resolution & Speed | 10-bit SAR ADC, 200 ksps with autoscan and internal reference; supports multi-channel sensor monitoring without external refs. |
| Power Consumption | 200 µA active @ 1 MHz/2.2 V; 0.7 µA standby; 0.1 µA off-mode with RAM retention - extends coin-cell life to years. |
| Wake-up Time | <6 µs from standby to active mode via DCO; critical for responsive wake-on-event sensor applications. |
| Communication | USART0 with software-selectable UART or SPI; enables flexible connectivity to transceivers, displays, or host MCUs. |
| Analog Inputs | 8-channel (A0–A7), including VREF+/VREF− on P2.3/P2.4; supports ratiometric measurements and internal reference routing. |
Pinout & Package
Package: 28-pin plastic TSSOP (PW) or 28-pin plastic SOWB (DW); both share identical pin mapping per datasheet SLAS361D. QFN (RHB) variant uses 32-pin layout and is not applicable to CY suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK/ADC10CLK | Timer_A clock input / ADC conversion clock | Enables synchronized sampling and timer-triggered conversions; supports external clock source or internal SMCLK. |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG test clock | Provides SMCLK for peripherals; doubles as TCK during programming - eliminates need for external clock generator. |
| P2.3/TA1/A3/VREF−/VeREF− | Analog input / Timer_A channel / ADC negative reference | Configurable as ADC reference sink or analog input; allows differential measurement or external reference biasing. |
| P2.4/TA2/A4/VREF+/VeREF+ | Analog input / Timer_A channel / ADC positive reference | Supports internal 1.5/2.0/2.5 V reference selection or external VREF+; enables precision ratiometric sensing. |
| P3.4/UTXD0 | USART0 transmit data output | Drives UART TX line directly; compatible with 3.3 V logic-level transceivers (e.g., MAX3232) without level-shifting. |
| P3.5/URXD0 | USART0 receive data input | Accepts standard UART RX signals; internal pull-up configurable for open-drain bus compatibility. |
| RST/NMI | Reset or non-maskable interrupt input | Active-low reset with brownout protection; also serves as NMI source for critical fault handling (e.g., sensor over-range). |
| XIN/XOUT | Crystal oscillator input/output | Supports 32.768 kHz watch crystal for RTC or high-frequency crystals up to 8 MHz; essential for accurate timekeeping. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 0.1 µA off-mode (RAM retention) enables decade-scale battery life in sealed environmental sensors. |
| Integrated ADC10 with DTC | Autoscan across A0–A7 and automatic result storage to RAM frees CPU for RF processing or encryption tasks. |
| USART0 dual-mode interface | Single peripheral supports UART (for host MCU comms) or SPI (for flash memory or display drivers) - reduces BOM count. |
| Programmable code protection | Security fuse prevents flash read-out; protects proprietary algorithms in edge AI inference or sensor fusion firmware. |
| Digital I/O with interrupt capability | All P1 and P2 pins support edge-selectable interrupts; enables wake-on-motion or wake-on-voltage-threshold without polling. |
Applications
| Wireless Sensor Node | Glass Breakage Detection |
|---|---|
|
Use Scenario: Battery-powered IoT node measuring temperature, humidity, and acoustic signature in smart buildings. IC Role / Device Role / Timing Role: Central MCU executing ADC sampling, FFT preprocessing, and UART-based LoRaWAN telemetry. Use Value: 200 µA active current and <6 µs wake-up enable sub-second acoustic event capture with multi-year coin-cell operation. |
Use Scenario: Standalone acoustic security sensor detecting resonant frequencies associated with breaking glass. IC Role / Device Role / Timing Role: Real-time signal processor using ADC10 + DTC to stream audio samples into RAM for wave digital filter analysis. Use Value: 10-bit resolution at 200 ksps and autonomous DTC transfers allow continuous 16 kHz sampling without CPU overhead. |
| Portable Medical Monitor | Industrial Data Logger |
|
Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and driving OLED display via SPI. IC Role / Device Role / Timing Role: Mixed-signal controller managing ADC acquisition, LED drive timing, and display refresh via USART0 SPI mode. Use Value: Integrated VREF+/VREF− and 8 analog inputs simplify front-end design; 1.8–3.6 V supply supports single Li-ion or two AA cells. |
Use Scenario: Ruggedized field logger recording voltage, current, and temperature from industrial machinery. IC Role / Device Role / Timing Role: Low-power data concentrator with UART interface to RS-485 transceiver and flash memory for local storage. Use Value: 8 KB flash stores firmware + 1 week of timestamped 10-bit samples; brownout protection ensures reliable logging during power dips. |
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 |
|---|---|---|---|
| MSP430F1222IPW | 4 KB flash, same 256 B RAM, identical peripherals and pinout | Limited firmware space restricts complex DTC sequences or multi-protocol stacks | Select when application firmware fits within 4 KB and no additional flash headroom is needed for field updates. |
| MSP430F2274IRHBT | 16 KB flash, 1 KB RAM, enhanced USCI (UART/SPI/I²C), 1.8–3.6 V supply | Supports I²C sensors and larger buffer storage; requires PCB redesign due to 40-pin QFN package | Choose for future-proofing with I²C expansion or when migrating from legacy F1xx to F2xx toolchain and debug ecosystem. |
Compared with MSP430F1232CY, MSP430F1222IPW offers identical low-power behavior and pin compatibility but halves flash capacity, while MSP430F2274IRHBT adds I²C and memory headroom at the cost of package change and higher pin count - making it suitable for next-generation designs requiring protocol flexibility.
Availability
MSP430F1232CY is available at Aetrix Electronics and suitable for wireless sensor nodes, acoustic security systems, portable medical monitors, and industrial data loggers requiring stable component supply and long-term manufacturability.
Supply support for MSP430F1232CY 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.
The MSP430x12x2 product line was engineered specifically for extended-battery-life portable measurement applications, integrating precision analog, efficient RISC processing, and aggressive power gating - all optimized for sensor-edge intelligence.
FAQ
What is the maximum operating frequency of the MSP430F1232CY?
The MSP430F1232CY does not specify a maximum system clock frequency in its datasheet; instead, it guarantees correct operation up to 8 MHz when using an external crystal or resonator. Internal DCO operation is calibrated for stability across 1–8 MHz ranges, with typical active-mode performance validated at 1 MHz for 200 µA consumption.
Does the MSP430F1232CY support I²C communication?
No, the MSP430F1232CY does not include hardware I²C support. It features USART0 configured exclusively for UART or SPI protocols. For I²C functionality, designers must implement bit-banged software I²C on GPIO pins or select an alternative MCU such as the MSP430F2274 which integrates USCI modules supporting UART, SPI, and I²C.
What package options are available for the MSP430F1232CY?
The MSP430F1232CY is offered in 28-pin plastic TSSOP (PW) and 28-pin plastic SOWB (DW) packages. Both share identical pin assignments and electrical characteristics. The 32-pin QFN (RHB) variant is part of the broader MSP430x12x2 family but is not designated with the 'CY' suffix and is not interchangeable with the CY-marked devices.
How is the ADC10 reference voltage configured on the MSP430F1232CY?
The ADC10 reference on the MSP430F1232CY is selected via ADC10CTL0 register bits REFON, REF2_5V, and SREFx. It supports internal 1.5 V, 2.0 V, or 2.5 V references, or external VREF+ and VREF− applied to P2.4 and P2.3. The internal reference remains stable across temperature and supply variations, eliminating need for external precision references in most sensor applications.
Can the MSP430F1232CY be programmed in-system without a JTAG debugger?
Yes, the MSP430F1232CY includes a factory-programmed bootstrap loader (BSL) accessible via UART using P1.1 (TX) and P2.2 (RX). This allows in-system programming through a serial interface without external JTAG hardware - useful for field firmware updates or production-line flashing using minimal external circuitry.
MSP430F1232CY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- Die
- Series:
- MSP430x1xx
- Packaging:
- Tray
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F1232CY FAQ
1.How can I place an order for MSP430F1232CY through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1232CY 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 MSP430F1232CY reliable?
The price and inventory of MSP430F1232CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1232CY is usually 5 days.
3.What payment methods are accepted for MSP430F1232CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1232CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1232CY?
MSP430F1232CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1232CY 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 MSP430F1232CY?
For technical support, including MSP430F1232CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1232CY requirements.
6.How does Aetrix verify that MSP430F1232CY is sourced from the original manufacturer or authorized distributors?
All MSP430F1232CY 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 MSP430F1232CY meets industry standards.
7.What is the process for return or replacement of MSP430F1232CY?
All MSP430F1232CY units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1232CY, 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 MSP430F1232CY part is unused and in its original packaging.
Return procedure for MSP430F1232CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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