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Texas Instruments MSP430F122IRHBR
- Part No.:
- MSP430F122IRHBR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430F122IRHBR.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
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Product details
Overview
MSP430F122IRHBR from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 4KB Flash, 256B RAM, a 16-bit Timer_A with three capture/compare registers, on-chip analog comparator, and UART/SPI-capable USART0. It operates from 1.8 V to 3.6 V and supports wake-up from standby in under 6 μs-ideal for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F122IRHBR datasheet, MSP430F122IRHBR pinout, MSP430F122IRHBR application, or MSP430F122IRHBR equivalent, key selection considerations include its 28-pin QFN (RHB) package, 22 GPIOs (including 14 interrupt-capable I/O), integrated slope A/D via comparator, and five low-power modes optimized for energy-constrained embedded designs.
Technical Context
The MSP430F122IRHBR implements a 16-bit CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO), 32 kHz crystal support, and selectable internal resistors-enabling fast wake-up and flexible clock sourcing without external components.
Peripheral integration includes Timer_A3 with independent capture/compare channels mapped to P1/P2 pins, a comparator supporting battery monitoring and single-slope ADC, and USART0 configurable as UART or SPI with double-buffered TX/RX. All I/O ports (P1–P3) are software-configurable for direction, pull-up/down, and edge-triggered interrupts-with P1 and P2 supporting interrupt flags per pin.
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 125 ns instruction cycle at 8 MHz. |
| Memory | 4KB Flash + 256B RAM + 1KB ROM BSL; supports in-system programming via UART or JTAG without external voltage. |
| Power Consumption | 200 μA active @ 1 MHz/2.2 V; 0.7 μA standby; 0.1 μA LPM4 (RAM retention); five software-selectable low-power modes. |
| Timer & Capture | 16-bit Timer_A3 with three capture/compare registers (TACCR0–2); supports PWM, interval timing, and input capture with ≤50 ns resolution @ 3 V. |
| Analog Function | Comparator_A with two inputs (CA0/CA1), output (CAOUT), and slope A/D capability-enables resistive sensor digitization without external ADC. |
| Communication | USART0 supports asynchronous UART (UTXD0/URXD0) and synchronous SPI (SIMO0/SOMI0/UCLK0/STE0) with programmable baud rate and modulation control. |
| Operating Range | −40°C to +85°C ambient; 1.8 V to 3.6 V supply; supports 32 kHz watch crystal, high-frequency crystal, or single-resistor DCO configuration. |
Pinout & Package
Package: 32-pin QFN (RHB), 5 mm × 5 mm, exposed thermal pad (recommended connection to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 30) | Supply voltage input | Primary power rail for core and peripherals; requires local 100 nF decoupling to VSS. |
| VSS (Pin 1) | Ground reference | System ground; must connect to exposed thermal pad for thermal and electrical integrity. |
| RST/NMI (Pin 5) | Reset or nonmaskable interrupt | Active-low reset input; also serves as NMI source when configured via SFR. |
| TEST (Pin 29) | JTAG test mode select | Enables JTAG debugging and programming; pulled low during normal operation. |
| P1.0/TACLK (Pin 21) | Timer_A clock input / GPIO | External clock source for Timer_A; configurable as general-purpose I/O with interrupt capability. |
| P2.2/CAOUT/TA0 (Pin 8) | Comparator output / Timer_A channel 0 | Drives comparator result or Timer_A CCI0B capture signal; used for BSL receive in boot mode. |
| P3.4/UTXD0 (Pin 13) | UART transmit data | Asynchronous serial output for USART0; supports 8-N-1 framing and programmable baud rate. |
| XIN (Pin 3) | Clock oscillator input | Input for 32 kHz watch crystal or high-frequency crystal; paired with XOUT (Pin 2). |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 0.1 μA LPM4 current enables multi-year battery life in coin-cell-powered sensor endpoints. |
| Integrated analog comparator | Supports precision slope A/D conversion on resistive sensors-eliminates need for external ADC in simple sensing applications. |
| Flexible clock system | Digital-controlled oscillator (DCO) stabilizes in <6 μs, enabling rapid wake-up from deep sleep without crystal startup delay. |
| On-chip bootloader (BSL) | UART-based flash programming with password protection-allows field firmware updates without JTAG hardware. |
| Interrupt-capable I/O | 14 pins (P1.0–P1.7, P2.0–P2.5) support individually configurable edge-triggered interrupts-ideal for wake-on-event sensor interfaces. |
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: Main controller executing sensor readout, data processing, low-power scheduling, and UART communication to RF IC. Use Value: 0.1 μA LPM4 current extends CR2032 battery life beyond 5 years; integrated comparator digitizes thermistor without external components. | Use Scenario: Wearable pulse oximeter capturing analog photodiode signals and displaying results on OLED. IC Role / Device Role / Timing Role: Analog front-end controller performing slope A/D on photodiode outputs, driving display interface, and managing button interrupts. Use Value: Single-slope A/D using Comparator_A and Timer_A eliminates discrete ADC; 22 GPIOs support LED indicators, buttons, and display control lines. |
| Industrial Data Logger | Smart Meter Sensor Interface |
Use Scenario: Standalone environmental logger recording temperature, pressure, and humidity at 1-minute intervals. IC Role / Device Role / Timing Role: Timekeeping and data acquisition controller using 32 kHz crystal for real-time clock, Flash storage management, and periodic wake-up. Use Value: LPM3 mode (1.6–1.9 μA @ 3 V) enables >2-year operation on AA batteries; 4KB Flash stores >10,000 timestamped samples. | Use Scenario: Tamper-detection circuit monitoring enclosure switch and voltage rails in electricity meter. IC Role / Device Role / Timing Role: Low-power security monitor sampling switch state and supply voltage via comparator_A and GPIO interrupts. Use Value: Comparator_A threshold detection triggers immediate wake-up from LPM4; programmable code protection prevents unauthorized firmware access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F2274IRHBT | 16KB Flash, 1KB RAM, enhanced USCI (UART/SPI/I²C), 10-bit ADC, 25 MHz max MCLK | Requires higher supply current in active mode (270 μA @ 1 MHz); supports I²C and higher-speed communication | Select for designs needing ADC, I²C, or larger code space-requires layout revision due to different pinout and package (32-pin QFN, but not pin-compatible). |
| MSP430G2553IPW28 | 16KB Flash, 512B RAM, built-in 10-bit ADC, 16 MHz MCLK, 28-pin TSSOP package | Higher active current (220 μA @ 1 MHz), no comparator_A; uses different clock system (calibrated DCO only) | Choose for cost-sensitive, ADC-reliant applications where QFN assembly is impractical; not drop-in-requires PCB redesign and firmware adaptation. |
Compared with MSP430F122IRHBR, the MSP430F2274IRHBT offers greater memory and peripheral richness at higher power, while the MSP430G2553IPW28 trades comparator-based analog functionality for integrated ADC and lower-cost packaging-neither is pin-compatible, and both require firmware and layout changes.
Availability
MSP430F122IRHBR 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 lifecycle support.
Supply support for MSP430F122IRHBR 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 MSP430x12x product line targets ultralow-power portable measurement applications-designed around a 16-bit RISC core, five low-power modes, and integrated analog peripherals to maximize battery life in sensor-centric systems.
FAQ
What is the maximum operating frequency of the MSP430F122IRHBR at 3.6 V?
The MSP430F122IRHBR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This limit applies to both active-mode execution and peripheral clocking (e.g., Timer_A, USART0). Operation above 8 MHz is not guaranteed and may cause timing violations or increased current consumption.
Does the MSP430F122IRHBR support hardware UART or only software-emulated serial?
The MSP430F122IRHBR includes a dedicated hardware USART0 peripheral that supports true asynchronous UART operation with programmable baud rate, start/stop bit generation, and double-buffered transmit/receive registers-no software bit-banging required. UART mode uses P3.4 (UTXD0) and P3.5 (URXD0) pins.
Can the MSP430F122IRHBR perform analog-to-digital conversion without an external ADC?
Yes-the MSP430F122IRHBR uses its on-chip Comparator_A module with Timer_A to implement slope-type analog-to-digital conversion. By charging a capacitor through a known resistor and measuring time-to-compare against a reference, it achieves digitization of resistive sensors (e.g., thermistors) without external ADC components.
What is the function of the TEST pin on the MSP430F122IRHBR?
The TEST pin (Pin 29) selects JTAG test mode for debugging and programming. When driven high during power-up, it enables JTAG interface access to the CPU and Flash memory. During normal operation, it must be held low (typically via pull-down resistor) to prevent unintended entry into test mode.
Is the MSP430F122IRHBR RoHS compliant and lead-free?
Yes-the MSP430F122IRHBR is manufactured in a RoHS-compliant, lead-free QFN package per Texas Instruments' standard product specifications. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020.
MSP430F122IRHBR 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:
- POR, PWM, WDT
- Number of I/O:
- 22
- 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:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F122IRHBR FAQ
1.How can I place an order for MSP430F122IRHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F122IRHBR 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 MSP430F122IRHBR reliable?
The price and inventory of MSP430F122IRHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F122IRHBR is usually 5 days.
3.What payment methods are accepted for MSP430F122IRHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F122IRHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F122IRHBR?
MSP430F122IRHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F122IRHBR 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 MSP430F122IRHBR?
For technical support, including MSP430F122IRHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F122IRHBR requirements.
6.How does Aetrix verify that MSP430F122IRHBR is sourced from the original manufacturer or authorized distributors?
All MSP430F122IRHBR 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 MSP430F122IRHBR meets industry standards.
7.What is the process for return or replacement of MSP430F122IRHBR?
All MSP430F122IRHBR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F122IRHBR, 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 MSP430F122IRHBR part is unused and in its original packaging.
Return procedure for MSP430F122IRHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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