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Texas Instruments MSP430F112IPW
- Part No.:
- MSP430F112IPW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F112IPW.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,352
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Product details
Overview
MSP430F112IPW from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB+256B flash memory, 256B RAM, and integrated Timer_A3 featuring three capture/compare registers. It operates from 1.8 V to 3.6 V, achieves 200 µA active current at 1 MHz/2.2 V, and wakes from standby in under 6 µs - optimized for battery-powered sensor systems and standalone RF front-ends.
For engineers reviewing the MSP430F112IPW datasheet, MSP430F112IPW pinout, MSP430F112IPW application, or MSP430F112IPW equivalent, key selection criteria include its 20-pin TSSOP package, LPM4 ultra-low-power mode (0.1 µA RAM retention), DCO-based sub-6-µs wake-up, and JTAG + BSL serial programming support without external voltage.
Technical Context
The MSP430F112IPW implements a 16-bit RISC CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one MCLK cycle. Its basic clock module supports multiple sources: internal DCO, 32 kHz crystal (ACLK), high-frequency crystal, resonator, or external clock - enabling flexible low-power timing architectures.
It integrates two 8-bit I/O ports (14 total pins: P1.0–P1.7 and P2.0–P2.5), each with individually configurable direction, interrupt enable, edge select, and flag registers. Timer_A3 provides 16-bit counter capability with three independent capture/compare channels, supporting PWM generation, input capture, and interval timing with dedicated interrupt vectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators for optimized code density and execution efficiency |
| Memory | 4KB + 256B flash program memory and 256B RAM - supports in-system programming via JTAG or UART-based BSL |
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct operation from single-cell Li-ion, alkaline, or coin-cell batteries |
| Active Mode Current | 200 µA at 1 MHz, 2.2 V - defines baseline power budget for continuous sensing or processing tasks |
| Low-Power Mode LPM4 | 0.1 µA with RAM retention - sustains real-time clock or wake-on-event state during extended sleep intervals |
| Wake-Up Time | <6 µs from LPM3/LPM4 to active mode - minimizes latency for time-critical sensor interrupts or RF packet reception |
| Timer_A3 Channels | Three independent capture/compare registers (TACCR0–TACCR2) - enables simultaneous PWM outputs, input capture on multiple signals, or multi-phase timing control |
Pinout & Package
Package: 20-pin Plastic Thin Shrink Small-Outline Package (TSSOP), PW suffix, body width 4.4 mm, lead pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 TEST | JTAG test mode select | Must be tied low ≤30 kΩ to enable JTAG debugging and programming on Port 1 pins |
| 2 VCC | Main supply voltage | 1.8–3.6 V input; decoupling capacitor required near pin for stable core and peripheral operation |
| 3 P2.5/ROSC | DCO resistor input | Connects external resistor to set nominal DCO frequency - enables fast wake-up without crystal startup delay |
| 4 VSS | Ground reference | Primary return path for digital and analog circuitry; must be low-impedance connection to PCB ground plane |
| 5 XOUT/TCLK | Crystal oscillator output / test clock input | Drives external crystal or accepts external clock source for ACLK/SMCLK generation |
| 6 XIN | Crystal oscillator input | Input for 32 kHz watch crystal or high-frequency crystal; requires load capacitors per crystal spec |
| 7 RST/NMI | Reset / nonmaskable interrupt | PuLL-down required externally; asserts POR on power-up and triggers NMI on falling edge |
| 8 P2.0/ACLK | Port 2 bit 0 / auxiliary clock output | Configurable as GPIO or ACLK output - provides 32 kHz timing signal to external circuits |
| 9 P2.1/INCLK | Port 2 bit 1 / Timer_A clock input | Accepts external clock signal for Timer_A synchronization - enables precise event timing independent of system clocks |
| 10 P2.2/TA0 | Port 2 bit 2 / Timer_A channel 0 input | Supports CCI0B capture or TA0 compare output - used for secondary timer input or PWM output routing |
| 11 P2.3/TA1 | Port 2 bit 3 / Timer_A channel 1 input | Supports CCI1B capture or TA1 compare output - extends dual-channel PWM or capture capability |
| 12 P2.4/TA2 | Port 2 bit 4 / Timer_A channel 2 output | Provides TA2 compare output - completes third independent PWM or timing channel |
| 13 P1.0/TACLK | Port 1 bit 0 / Timer_A clock input | Accepts external clock for Timer_A - enables asynchronous timing or gated clocking schemes |
| 14 P1.1/TA0/TMS | Port 1 bit 1 / Timer_A channel 0 / JTAG TMS | Shared function: TA0 capture/compare or JTAG test mode select - multiplexed based on TEST pin state |
| 15 P1.2/TA1/TDI | Port 1 bit 2 / Timer_A channel 1 / JTAG TDI | Shared function: TA1 capture/compare or JTAG test data input - enables debug without dedicated pins |
| 16 P1.3/TA2 | Port 1 bit 3 / Timer_A channel 2 | Supports CCI2A capture or TA2 compare output - primary channel for third PWM or input capture |
| 17 P1.4/SMCLK/TCK | Port 1 bit 4 / sub-main clock output / JTAG TCK | Outputs SMCLK or accepts JTAG clock - allows clock monitoring or synchronized debug access |
| 18 P1.5/TA0/TMS | Port 1 bit 5 / Timer_A channel 0 / JTAG TMS | Shared function: TA0 compare output or JTAG test mode select - reduces pin count for dual-role use |
| 19 P1.6/TA1/TDI | Port 1 bit 6 / Timer_A channel 1 / JTAG TDI | Shared function: TA1 compare output or JTAG test data input - supports compact debug-enabled designs |
| 20 P1.7/TA2/TDO/TDI | Port 1 bit 7 / Timer_A channel 2 / JTAG TDO/TDI | Shared function: TA2 compare output or JTAG test data output/input - enables full JTAG functionality in 20-pin TSSOP |
Key Features
| Feature | Design Value |
|---|---|
| Five software-selectable low-power modes (LPM0–LPM4) | Enables fine-grained power management - e.g., LPM3 retains ACLK while disabling DCO and MCLK for RTC-only operation |
| Digital controlled oscillator (DCO) with <6 µs stabilization | Eliminates crystal startup delay during wake-up - critical for duty-cycled sensor nodes requiring sub-10 µs response |
| Integrated bootstrap loader (BSL) with UART interface | Allows field firmware updates via simple serial connection - no JTAG hardware needed for production programming |
| 14 programmable I/O pins with individual interrupt control | Supports edge-triggered interrupts on all pins - enables wake-on-button, wake-on-sensor-event, or multi-source interrupt handling |
| JTAG boundary-scan and emulation support | Provides full read/write memory access, register inspection, and real-time breakpoint debugging - accelerates firmware validation |
| Flash memory with segment erase and password protection | Permits selective firmware updates and prevents unauthorized code extraction - essential for secure embedded deployments |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: MSP430F112IPW acts as main controller, sampling sensors via GPIO/analog interface (external ADC), managing RF packet framing, and controlling sleep/wake cycles. Use Value: 0.1 µA LPM4 current extends 10-year battery life; 6 µs wake-up ensures timely response to RF preamble detection. |
Use Scenario: Wearable pulse oximeter logging SpO₂ and heart rate over 72-hour clinical study. IC Role / Device Role / Timing Role: MSP430F112IPW coordinates LED drivers, photodiode signal conditioning (via external analog front-end), and SD card logging with precise timing. Use Value: 200 µA active current at 1 MHz enables continuous 100 Hz sampling; 256B RAM buffers 30 seconds of raw waveform data before write. |
| Smart Utility Meter Interface | Industrial Condition Monitor |
Use Scenario: Tamper-resistant electricity meter with optical port and magnetic switch detection. IC Role / Device Role / Timing Role: MSP430F112IPW monitors tamper inputs (magnetic, cover-open), manages IR communication protocol, and maintains secure metering logs. Use Value: Schmitt-trigger inputs reject EMI on long leads; flash memory password protection prevents firmware tampering. |
Use Scenario: Vibration sensor on motor bearing, performing FFT preprocessing before wireless transmission. IC Role / Device Role / Timing Role: MSP430F112IPW acquires ADC samples using Timer_A-triggered conversions, executes lightweight DSP routines, and initiates RF burst on threshold exceedance. Use Value: 16-bit Timer_A3 with three compare registers enables precise ADC trigger alignment, sample windowing, and event timestamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F113IPW | Same package and core, but includes 10-bit SAR ADC (not present in MSP430F112IPW) | Eliminates need for external ADC in analog-sensing applications; increases BOM count only if ADC unused | Select MSP430F113IPW when on-chip analog acquisition is required; otherwise MSP430F112IPW offers lower cost and identical power/performance for digital-only tasks |
| MSP430F2131IPW | Newer generation with enhanced DCO stability, 16-MHz max MCLK, and improved LPM3/LPM4 current (0.3 µA vs 0.1 µA) | Higher clock speed enables faster computation; slightly higher LPM4 current may impact ultra-long-life designs | Select MSP430F2131IPW for new designs needing >8 MHz operation or tighter DCO tolerance; retain MSP430F112IPW for legacy compatibility or minimal-LPM4-current requirements |
Compared with MSP430F113IPW, the MSP430F112IPW omits integrated ADC - reducing cost and die size where external signal conditioning exists. Against MSP430F2131IPW, it trades higher maximum frequency and newer peripherals for proven ultra-low LPM4 current and mature toolchain support.
Availability
MSP430F112IPW is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and smart utility meter interfaces requiring stable component supply across multi-year production cycles.
Supply support for MSP430F112IPW 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 for industrial, automotive, and consumer markets.
The MSP430F112IPW belongs to the MSP430x1xx ultralow-power MCU family, designed specifically for battery-operated measurement and sensing applications where extended runtime and rapid wake-up are critical system requirements.
FAQ
What is the maximum operating frequency of the MSP430F112IPW at 3.6 V?
The MSP430F112IPW supports a maximum processor frequency (MCLK) of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This limit applies to both active-mode execution and Timer_A clocking when sourced from MCLK or SMCLK. Exceeding this frequency may cause timing violations or unstable operation.
Does the MSP430F112IPW include an integrated analog-to-digital converter (ADC)?
No, the MSP430F112IPW does not include an integrated ADC. It is a digital-core variant within the MSP430F11x series - unlike the MSP430F113IPW, which adds a 10-bit SAR ADC. Analog signal acquisition requires external ADC components interfaced via GPIO or SPI/UART.
How is programming performed on the MSP430F112IPW without external voltage?
Programming is supported via two methods requiring no external programming voltage: (1) JTAG interface using standard 3.3 V logic levels, and (2) UART-based bootstrap loader (BSL) accessed through P1.1 (TX) and P2.2 (RX) pins. Both methods operate within the normal 1.8–3.6 V supply range.
What is the function of the TEST pin on the MSP430F112IPW?
The TEST pin (Pin 1) selects JTAG functionality on Port 1 pins. When pulled low with ≤30 kΩ, it enables JTAG test clock (TCK), test mode select (TMS), test data input (TDI), and test data output (TDO) on P1.4–P1.7. If left unconnected or high, those pins operate as standard GPIO/Timer_A functions.
Can the MSP430F112IPW retain RAM contents during power loss?
The MSP430F112IPW retains RAM contents in LPM4 mode at 0.1 µA, but only while VCC remains above the RAM retention minimum voltage (1.6 V). Below that threshold, data loss occurs. For true power-loss retention, an external backup capacitor or supercapacitor circuit is required to maintain VCC above 1.6 V during brownout events.
MSP430F112IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-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:
- -
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 14
- Program Memory Size:
- 4KB (4K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F112IPW FAQ
1.How can I place an order for MSP430F112IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F112IPW 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 MSP430F112IPW reliable?
The price and inventory of MSP430F112IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F112IPW is usually 5 days.
3.What payment methods are accepted for MSP430F112IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F112IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F112IPW?
MSP430F112IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F112IPW 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 MSP430F112IPW?
For technical support, including MSP430F112IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F112IPW requirements.
6.How does Aetrix verify that MSP430F112IPW is sourced from the original manufacturer or authorized distributors?
All MSP430F112IPW 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 MSP430F112IPW meets industry standards.
7.What is the process for return or replacement of MSP430F112IPW?
All MSP430F112IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F112IPW, 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 MSP430F112IPW part is unused and in its original packaging.
Return procedure for MSP430F112IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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