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Texas Instruments MSP430F1222IDWR
- Part No.:
- MSP430F1222IDWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MSP430F1222IDWR.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
MSP430F1222IDWR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB 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 achieves sub-6 µs wake-up from standby mode - ideal for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F1222IDWR datasheet, MSP430F1222IDWR pinout, MSP430F1222IDWR application, or MSP430F1222IDWR equivalent, key selection criteria include active-mode current (200 µA @ 1 MHz), RAM retention in off mode (0.1 µA), integrated ADC reference, USART0 protocol flexibility, and 28-pin TSSOP package compatibility with JTAG debugging and BSL serial programming.
Technical Context
The MSP430F1222IDWR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal support, and selectable ACLK/SMCLK/MCLK sources - all optimized for rapid low-power mode transitions.
Peripheral integration includes a 10-bit ADC with autoscan, data transfer controller (DTC), and internal reference; Timer_A3 with independent capture/compare channels on P1.x and P2.x pins; and USART0 with dual-buffered UART/SPI operation - all accessible via memory-mapped SFRs at fixed byte/word addresses (e.g., U0TXBUF at 077h, ADC10MEM at 1B4h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and 125 ns instruction cycle time - enables efficient signal processing in resource-constrained firmware. |
| Memory | 4KB flash + 256B RAM - sufficient for standalone sensor firmware with ADC data buffering and UART telemetry without external memory. |
| ADC Performance | 10-bit, 200 ksps with internal reference and DTC - supports continuous analog monitoring (e.g., temperature, voltage) with zero-CPU overhead result storage. |
| Power Modes | Five software-selectable low-power modes; LPM4 draws only 0.1 µA with RAM retention - extends coin-cell battery life to multi-year operation. |
| Wake-Up Time | <6 µs from standby to active mode - meets real-time response requirements in wake-on-event applications like motion-triggered logging. |
| Communication | USART0 with UART/SPI dual-mode support - enables flexible host interface options using shared P3.x pins without external level shifters. |
| Supply Range | 1.8 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, or two-cell alkaline power sources without regulation overhead. |
Pinout & Package
Package: 28-pin plastic TSSOP (PW), body size 9.7 mm × 4.4 mm, 0.65 mm pitch, exposed thermal pad connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 / TEST | JTAG test mode select input | Enables boundary-scan and debug access when pulled high during reset; required for in-circuit programming and emulation. |
| 2 / VCC | Supply voltage input | Primary power rail for core and peripherals; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| 3 / P2.5/ROSC | DCO resistor input | Connects external resistor to set nominal DCO frequency - critical for clock stability when crystal is absent. |
| 4 / VSS | Ground reference | Common return path for all digital and analog circuits; tied to QFN thermal pad in RHB variant. |
| 5 / XOUT | Crystal oscillator output | Drives external 32-kHz watch crystal; requires parallel load capacitance matching crystal spec (typically 12.5 pF). |
| 6 / XIN | Crystal oscillator input | Accepts crystal or external clock source; enables precise timing for RTC or low-jitter sampling intervals. |
| 7 / RST/NMI | Reset/nonmaskable interrupt | Pulled low to force hardware reset; also serves as NMI input for critical fault handling (e.g., brownout detection). |
| P1.0–P1.7 | General I/O with timer/ADC functions | Support capture/compare (TA0–TA2), ADC clock (TACLK), and BSL UART (P1.1/P2.2) - enables mixed-signal control with minimal external components. |
| P2.0–P2.4 | Analog/digital I/O with ADC inputs | Provide A0–A4 analog inputs plus VREF+/VREF− terminals - allows ratiometric sensing and differential measurements without external references. |
| P3.0–P3.7 | USART0 and extended ADC channels | Deliver SPI/UART signals (SIMO0, SOMI0, UCLK0, UTXD0, URXD0) and ADC inputs A5–A7 - expands serial connectivity and analog channel count beyond P1/P2. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DCO with <6 µs stabilization | Eliminates need for external high-frequency crystal in cost-sensitive designs while maintaining fast wake-up responsiveness. |
| ADC10 with autoscan and DTC | Automatically sequences conversions across up to eight analog inputs and stores results directly to RAM - removes polling or ISR overhead. |
| Programmable code protection | Security fuse prevents unauthorized read-out of flash contents - essential for protecting proprietary algorithms in deployed devices. |
| Supply voltage brownout protection | Generates automatic reset if VCC drops below threshold - ensures reliable operation during battery depletion or transient supply dips. |
| Onboard serial programming (BSL) | Enables field firmware updates via UART using only P1.1 (TX) and P2.2 (RX) - no JTAG debugger required for production reprogramming. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and ambient light via ADC inputs, transmitting data over UART to BLE gateway. IC Role / Device Role / Timing Role: Central MCU managing sensor acquisition, low-power scheduling, and serial telemetry - leveraging LPM4 for 99.9% sleep duty cycle. Use Value: 0.1 µA off-mode current and sub-6 µs wake-up enable multi-year operation on CR2032; integrated ADC reference eliminates external precision components. | Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, performing real-time SpO₂ calculation, and displaying results on segmented LCD. IC Role / Device Role / Timing Role: Signal-processing MCU executing FIR filtering and ADC oversampling - using Timer_A3 for precise LED drive timing and ADC trigger synchronization. Use Value: 10-bit ADC with 200 ksps and DTC enables high-fidelity waveform capture; 1.8 V minimum supply supports direct connection to single Li-ion cell. |
| Industrial Data Logger | Smart Utility Meter Interface |
Use Scenario: DIN-rail mounted logger recording voltage/current transformer outputs every 10 seconds, storing data in flash, and uploading via RS-232 UART. IC Role / Device Role / Timing Role: Standalone data acquisition controller with flash wear-leveling, timestamping via ACLK, and UART framing - using USART0 in UART mode. Use Value: 4KB flash accommodates firmware + 2 weeks of 10-second samples; brownout protection prevents corruption during AC line sags. | Use Scenario: AMI meter sub-module interfacing with metrology IC via SPI, reading kWh registers, and communicating with PLC modem over UART. IC Role / Device Role / Timing Role: Protocol bridge MCU handling SPI master transactions with metrology chip and UART slave communication with modem - using P3.x pins for dual-bus isolation. Use Value: Dedicated USART0 hardware supports simultaneous SPI and UART without CPU intervention; 28-pin TSSOP fits constrained meter PCB layouts. |
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 |
|---|---|---|---|
| MSP430F1232IDWR | 8KB flash, same RAM, peripherals, and package - double program memory capacity. | Suitable for applications requiring larger firmware (e.g., OTA update stack, cryptographic libraries). | Select when firmware size exceeds 4KB or future feature expansion is anticipated. |
| MSP430F2274IRHBT | 16KB flash, 1KB RAM, enhanced USCI module (USCI_A0 + USCI_B0), 40-pin QFN - higher integration and memory. | Required for designs needing dual serial interfaces (e.g., UART + I²C) or >4KB application code. | Choose when additional memory, I/O count, or second hardware serial port is mandatory. |
Compared with MSP430F1222IDWR, the F1232IDWR offers scalable code space without changing PCB layout, while the F2274IRHBT provides greater peripheral flexibility and memory headroom at the cost of larger footprint and higher unit cost - making the MSP430F1222IDWR optimal for cost-sensitive, compact, battery-operated designs with stable firmware size.
Availability
MSP430F1222IDWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MSP430F1222IDWR 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 was designed specifically for ultralow-power portable measurement applications - combining mixed-signal peripherals, aggressive power gating, and fast wake-up to maximize battery life in sensor and instrumentation systems.
FAQ
What is the maximum ADC sampling rate supported by the MSP430F1222IDWR?
The MSP430F1222IDWR supports a maximum ADC conversion rate of 200 ksps (kilo-samples per second) in its 10-bit SAR architecture. This rate is achievable with internal reference and sample-and-hold enabled, and is specified under typical conditions (2.2 V, 25°C). The actual sustained throughput depends on configuration - for example, autoscan across multiple channels reduces effective rate due to sequencing overhead. The MSP430F1222IDWR datasheet confirms this value in the ADC10 electrical characteristics table.
Does the MSP430F1222IDWR support hardware UART and SPI simultaneously?
No, the MSP430F1222IDWR features a single USART0 module that supports either UART or SPI mode - not both concurrently. The mode is selected via software configuration of U0CTL register bits (SYNC=0 for UART, SYNC=1 for SPI). While it can switch between protocols dynamically, it cannot maintain active UART and SPI links at the same time. This limitation is documented in the SLAS361D datasheet section "USART0 (MSP430x12x2 Only)" and confirmed in the functional block diagram.
What package type does the MSP430F1222IDWR use, and what are its key mechanical dimensions?
The MSP430F1222IDWR uses a 28-pin plastic TSSOP (Thin Shrink Small Outline Package) with designation PW. Its body dimensions are 9.7 mm × 4.4 mm, lead pitch is 0.65 mm, and total height is 1.2 mm max. The package includes an exposed thermal pad on the underside, recommended to be soldered to a VSS copper pour for thermal and electrical stability. This information is specified in the "AVAILABLE OPTIONS" table and mechanical drawings of SLAS361D.
How does the MSP430F1222IDWR achieve 0.1 µA current consumption in off mode?
The MSP430F1222IDWR achieves 0.1 µA in off mode (RAM retention) by disabling all clocks (ACLK, SMCLK, MCLK), turning off the DCO and crystal oscillator, and powering down all peripheral modules except RAM. Only the RAM retention circuit remains active, preserving data across deep sleep. This state is entered via software-controlled LPM4 mode and verified in the "Ultralow-Power Consumption" section of SLAS361D, measured at 2.2 V and 25°C.
Can the MSP430F1222IDWR be programmed in-system without a JTAG debugger?
Yes, the MSP430F1222IDWR supports in-system programming via its built-in Bootstrap Loader (BSL), which operates over UART using P1.1 (TX) and P2.2 (RX) pins. No external programming voltage is required - only a 3.3 V logic-level UART interface and correct BSL password entry. This capability is fully documented in the "Bootstrap Loader (BSL)" section of SLAS361D and enables field firmware updates without JTAG hardware.
MSP430F1222IDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- 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:
- 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:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F1222IDWR FAQ
1.How can I place an order for MSP430F1222IDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1222IDWR 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 MSP430F1222IDWR reliable?
The price and inventory of MSP430F1222IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1222IDWR is usually 5 days.
3.What payment methods are accepted for MSP430F1222IDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1222IDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1222IDWR?
MSP430F1222IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1222IDWR 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 MSP430F1222IDWR?
For technical support, including MSP430F1222IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1222IDWR requirements.
6.How does Aetrix verify that MSP430F1222IDWR is sourced from the original manufacturer or authorized distributors?
All MSP430F1222IDWR 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 MSP430F1222IDWR meets industry standards.
7.What is the process for return or replacement of MSP430F1222IDWR?
All MSP430F1222IDWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1222IDWR, 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 MSP430F1222IDWR part is unused and in its original packaging.
Return procedure for MSP430F1222IDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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