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Texas Instruments MSP430F156IPMR
- Part No.:
- MSP430F156IPMR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430F156IPMR.pdf
- Description:
- IC MCU 16BIT 24KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,360
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Product details
Overview
MSP430F156IPMR from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 24KB+256B Flash, 1KB RAM, a 12-bit ADC with internal reference and autoscan, dual 12-bit DACs, two 16-bit timers (Timer_A3 and Timer_B3), three-channel DMA, and dual USART interfaces supporting UART/SPI/I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and portable instrumentation.
For engineers reviewing the MSP430F156IPMR datasheet, MSP430F156IPMR pinout, MSP430F156IPMR application, or MSP430F156IPMR equivalent, key selection criteria include Flash/RAM size, 64-pin QFP package compatibility, Timer_B3 (3 capture/compare registers) vs. Timer_B7 variants, absence of USART1 hardware, and LPM4 standby current of 0.2 μA with RAM retention.
Technical Context
The MSP430F156IPMR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its clock system includes DCO, ACLK, SMCLK, and MCLK with sub-6-μs wake-up from LPM3/LPM4 via external interrupt or timer event.
Peripherals are memory-mapped and fully accessible via standard instructions. The device lacks hardware multiplier and extended RAM addressing-distinguishing it from MSP430F161x series-and supports only USART0 (not USART1), limiting dual-serial-channel applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators; enables efficient C compilation and deterministic timing. |
| Memory | 24KB+256B Flash (main + info memory), 1KB RAM; supports in-system programming and BSL-based UART updates without external voltage. |
| ADC | 12-bit SAR ADC with 8-channel analog input, internal reference, sample-and-hold, and autoscan; achieves <10 μs conversion time for real-time sensor sampling. |
| DAC | Dual 12-bit voltage-output DACs (DAC0/DAC1) with synchronization; suitable for precision analog waveform generation or calibration signal injection. |
| Timers | Timer_A3 (3 capture/compare registers) and Timer_B3 (3 capture/compare registers, no shadow registers); supports PWM, input capture, and interval timing. |
| Low-Power Modes | Five software-selectable modes including LPM4 (0.2 μA, RAM retention, all clocks off); optimized for multi-year battery life in intermittent-sensing applications. |
| Communication | USART0 only (UART/SPI/I²C); no USART1-limits dual-protocol or redundant serial interface designs. |
Pinout & Package
Package: 64-pin Plastic Quad Flat Package (QFP), PM suffix, RoHS-compliant, 10 mm × 10 mm body, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt Input | Active-low reset initiation and NMI trigger; also enters bootstrap loader when held during power-up. |
| P1.0/TACLK | Timer_A Clock Input | External clock source for Timer_A; enables precise timing independent of system clocks. |
| P2.6/ADC12CLK/DMAE0 | ADC Conversion Clock / DMA Trigger | Configurable as ADC sampling clock source or external DMA channel 0 trigger for autonomous data acquisition. |
| P3.5/URXD0 | USART0 Receive Data | Asynchronous UART receive input; supports baud rates up to 1 Mbps at 8 MHz SMCLK. |
| P6.6/A6/DAC0 | Analog Input / DAC0 Output | Shared pin: 12-bit ADC input channel A6 or voltage-output DAC0; requires careful I/O configuration to avoid conflict. |
| AVCC / AVSS | Analog Power Supply | Dedicated analog supply pins (64 and 62) isolate noise-sensitive ADC/DAC circuitry from digital switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Standby Current | 1.1 μA in LPM3 (ACLK active) and 0.2 μA in LPM4 (all clocks off), enabling multi-year operation on coin-cell batteries. |
| Fast Wake-Up | Sub-6 μs wake-up from LPM3/LPM4 to active mode using DCO, critical for duty-cycled sensor nodes. |
| Integrated Analog Peripherals | Single-chip solution with 12-bit ADC, dual 12-bit DACs, comparator, and programmable voltage references-eliminates external signal-chain components. |
| Three-Channel DMA | Enables zero-CPU-overhead data transfers between peripherals (e.g., ADC → RAM, RAM → DAC), reducing active-mode time and power. |
| Secure Bootloader | On-chip UART-based BSL with password protection allows field firmware updates without JTAG debugger or external programmer. |
Applications
| Wireless Sensor Node | Portable Medical Meter |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via SPI-connected sub-GHz transceiver. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, data preprocessing, SPI communication, and ultra-low-power sleep scheduling. Use Value: LPM4 current of 0.2 μA extends 200 mAh coin-cell life to >10 years in 1-minute wake-up intervals. |
Use Scenario: Handheld blood glucose meter requiring analog front-end signal conditioning and LCD display control. IC Role / Device Role / Timing Role: Mixed-signal processor handling 12-bit ADC acquisition, dual DAC-based calibration offset correction, and segmented LCD drive. Use Value: Integrated DAC0/DAC1 eliminate external precision DACs; internal reference ensures stable measurement accuracy across temperature. |
| Industrial Process Monitor | Smart Energy Logger |
Use Scenario: DIN-rail mounted current/voltage monitor logging data to SPI flash every 10 seconds. IC Role / Device Role / Timing Role: Real-time acquisition engine using Timer_A3 for precise 10-s intervals and DMA to move ADC results to RAM. Use Value: Three-channel DMA offloads CPU during burst sampling, cutting active-mode duration by 70% versus polling-based implementation. |
Use Scenario: AC energy meter with isolated current sensing, requiring accurate RMS calculation and time-stamped kWh storage. IC Role / Device Role / Timing Role: Low-power host MCU coordinating 12-bit ADC oversampling, watchdog supervision, and RTC-backed timestamping via ACLK. Use Value: Dedicated ACLK output on P2.0 enables external RTC sync; brownout detector prevents corrupted flash writes during line dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F167IPMR | 32KB Flash, 1KB RAM, Timer_B7 (7 CCRs), USART1 support, same 64-pin QFP package. | Supports dual-serial protocols (e.g., Modbus RTU + I²C sensor bus) and higher code density for complex algorithms. | Select when needing USART1, additional timer resources, or larger Flash-no PCB change required due to pin compatibility. |
| MSP430F155IPMR | 16KB Flash, 512B RAM, identical peripheral set and pinout; lower memory capacity. | Suitable for simpler firmware with smaller footprint; reduced cost where memory headroom is not required. | Select for cost-sensitive designs with ≤16KB code and ≤512B RAM usage-pinout and layout identical. |
Compared with MSP430F156IPMR, the MSP430F167IPMR adds USART1 and Timer_B7 for expanded connectivity and timing flexibility, while the MSP430F155IPMR reduces memory to lower BOM cost-both retain identical 64-pin QFP packaging and core analog peripherals.
Availability
MSP430F156IPMR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical meters, industrial process monitors, and smart energy loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSP430F156IPMR 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 focus on power efficiency and system integration.
The MSP430F156IPMR belongs to the MSP430F15x ultralow-power microcontroller family, designed specifically for battery-operated measurement applications demanding extended runtime, integrated analog functionality, and robust low-power operation.
FAQ
What is the maximum operating frequency of the MSP430F156IPMR?
The MSP430F156IPMR supports a maximum CPU clock (MCLK) of 8 MHz derived from its digitally controlled oscillator (DCO). At 2.2 V supply, active-mode current is specified at 330 μA per MHz, confirming stable operation up to 8 MHz under typical conditions. External crystals (XT1/XT2) may be used for higher-precision timing but do not increase maximum CPU speed beyond the DCO limit.
Does the MSP430F156IPMR support I²C communication?
Yes, the MSP430F156IPMR supports I²C communication via USART0 configured in I²C mode. Pin P3.1 functions as SDA and P3.3 as SCL. The device implements standard I²C master functionality with programmable clock rate, start/stop detection, and address matching-but does not support I²C slave mode or multi-master arbitration per the MSP430F15x datasheet.
How much Flash memory is available on the MSP430F156IPMR, and is it segmented?
The MSP430F156IPMR contains 24KB of main Flash memory (address range 0xFFFFh–0xA000h) and 256B of information Flash memory (0x10FFh–0x1000h). Flash is organized into 512-byte segments, allowing individual segment erase or full-bank erase. Information memory holds calibration data and bootloader settings, and must be erased before first use per TI documentation.
What are the key differences between MSP430F156IPMR and MSP430F167IPMR?
The MSP430F156IPMR has 24KB Flash, 1KB RAM, Timer_B3 (3 capture/compare registers), and USART0 only. The MSP430F167IPMR offers 32KB Flash, same RAM, Timer_B7 (7 capture/compare registers), and adds USART1. Both share identical 64-pin QFP packaging and pinout, making them drop-in replacements where additional peripherals are not required.
Can the MSP430F156IPMR operate from a 1.8 V supply, and what features remain functional?
Yes, the MSP430F156IPMR is fully specified for 1.8 V to 3.6 V operation. At 1.8 V, all core functions-including 16-bit CPU execution, 12-bit ADC (with reduced sampling rate), dual DACs, Timer_A3/Timer_B3, DMA, and USART0-remain operational. Active-mode current drops to ~250 μA/MHz, and LPM4 standby remains at 0.2 μA, preserving ultralow-power capability across the full voltage range.
MSP430F156IPMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 24KB (24K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F156IPMR FAQ
1.How can I place an order for MSP430F156IPMR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F156IPMR 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 MSP430F156IPMR reliable?
The price and inventory of MSP430F156IPMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F156IPMR is usually 5 days.
3.What payment methods are accepted for MSP430F156IPMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F156IPMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F156IPMR?
MSP430F156IPMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F156IPMR 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 MSP430F156IPMR?
For technical support, including MSP430F156IPMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F156IPMR requirements.
6.How does Aetrix verify that MSP430F156IPMR is sourced from the original manufacturer or authorized distributors?
All MSP430F156IPMR 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 MSP430F156IPMR meets industry standards.
7.What is the process for return or replacement of MSP430F156IPMR?
All MSP430F156IPMR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F156IPMR, 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 MSP430F156IPMR part is unused and in its original packaging.
Return procedure for MSP430F156IPMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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