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Texas Instruments MSP430F1121AIDGVR
- Part No.:
- MSP430F1121AIDGVR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F1121AIDGVR.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
MSP430F1121AIDGVR from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 4KB flash + 256B RAM, 16-bit Timer_A with three capture/compare registers, on-chip analog comparator, and 14 I/O pins. It operates from 1.8 V to 3.6 V and supports wake-up from standby mode in less than 6 μs - ideal for battery-powered sensor systems requiring analog signal capture, A/D conversion, and low-duty-cycle processing.
For engineers reviewing the MSP430F1121AIDGVR datasheet, MSP430F1121AIDGVR pinout, MSP430F1121AIDGVR application, or MSP430F1121AIDGVR equivalent, key selection criteria include active-mode current at 1 MHz (≤350 μA @ 3 V), LPM3 standby current (≤1.9 μA @ 85°C), flash programmability via JTAG or BSL, and compatibility with 32-kHz crystal or internal DCO clock sources.
Technical Context
The MSP430F1121AIDGVR implements a 16-bit RISC 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), LFXT1 oscillator for 32-kHz crystals, and support for external resistors or high-frequency crystals - all configurable via BCSCTL1/2 and DCOCTL registers.
Peripherals include two 8-bit I/O ports (P1 with 8 pins, P2 with 6 exposed pins), Timer_A3 with three independent capture/compare registers and interrupt-capable overflow, Comparator_A for slope A/D or battery monitoring, and watchdog timer configurable as interval timer. All peripherals are memory-mapped and accessible via standard instructions.
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 code execution and deterministic timing. |
| Memory | 4KB flash + 256B RAM + 1KB boot ROM; supports in-system programming and secure code protection via fuse. |
| Supply Voltage | 1.8 V to 3.6 V; allows direct operation from single-cell Li-ion or dual-cell alkaline batteries without regulation. |
| Active Current | ≤350 μA at 1 MHz / 3 V (flash execution); enables >1-year battery life in periodic-sensing applications. |
| Standby Current | ≤1.9 μA in LPM3 (ACLK active, MCLK/SMCLK off); preserves real-time clock functionality while minimizing power. |
| Wake-up Time | <6 μs from LPM3/LPM4 to active mode; ensures rapid response to external interrupts without missing critical events. |
| Timer Resources | Timer_A3 with three capture/compare registers; supports PWM generation, input capture, and interval timing with independent interrupt vectors. |
Pinout & Package
Package: 20-pin TVSOP (DGV), body width 4.4 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Primary 1.8–3.6 V supply rail; requires local 100 nF decoupling to VSS. |
| VSS | Ground reference | System ground return; must be low-impedance connection for analog/digital stability. |
| RST/NMI | Reset or nonmaskable interrupt input | Active-low reset; also serves as NMI source when configured; internal pullup enabled after POR. |
| XIN / XOUT | Crystal oscillator inputs | Supports 32.768 kHz watch crystal; XIN is input, XOUT is buffered output for crystal drive. |
| P1.0–P1.7 | Port 1 bidirectional I/O | 8 pins with individually configurable direction, pullup/down, and edge-selectable interrupts; P1.0–P1.3 serve as Timer_A inputs. |
| P2.0–P2.5 | Port 2 bidirectional I/O | 6 pins with interrupt capability; P2.0 outputs ACLK, P2.1 accepts INCLK, P2.2–P2.4 interface with Comparator_A and Timer_A. |
| TEST | JTAG test mode select | Input that enables JTAG boundary scan and flash programming; tied high during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | Five software-selectable low-power modes (LPM0–LPM4); LPM4 draws ≤0.5 μA at 25°C with all clocks disabled. |
| Integrated analog comparator | Comparator_A supports precision slope A/D conversion, battery voltage supervision, and external signal monitoring without ADC resource use. |
| Flexible clock system | Dual-clock architecture (ACLK, SMCLK, MCLK) with DCO stabilization <6 μs; eliminates need for external high-speed crystal in many applications. |
| On-chip flash programming | Full flash reprogrammability via JTAG or UART-based BSL; no external programming voltage required; password-protected access. |
| Robust I/O architecture | 14 total I/O pins (8 on P1, 6 on P2) with individually masked interrupts, Schmitt-trigger inputs, and configurable pullup/pulldown resistors. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver on scheduled intervals. IC Role / Device Role / Timing Role: Main controller executing sensor readout, digital filtering, and RF packet assembly; uses ACLK from 32-kHz crystal for precise sleep/wake scheduling. Use Value: LPM3 current ≤1.9 μA extends 200 mAh coin-cell life beyond 3 years; Timer_A3 triggers periodic wake-up and manages RF transmit timing. | Use Scenario: Wearable pulse oximeter capturing analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: Analog front-end controller performing slope A/D via Comparator_A, managing LED drive timing, and processing raw data before Bluetooth transmission. Use Value: Integrated comparator eliminates external ADC; 16-bit Timer_A provides accurate LED pulse-width control and synchronization with photodiode sampling. |
| Industrial Process Sensor | Smart Utility Meter Interface |
Use Scenario: DIN-rail mounted pressure/transducer interface converting analog 4–20 mA signals into digital Modbus RTU packets. IC Role / Device Role / Timing Role: Signal conditioner and protocol engine; reads analog inputs via resistor-based A/D on P1.x, formats Modbus frames, and drives RS-485 transceiver. Use Value: 14 I/O pins support dedicated UART, status LEDs, and isolated digital inputs; flash memory stores calibration coefficients and firmware updates. | Use Scenario: Tamper-resistant electricity meter auxiliary interface handling pulse counting, LCD refresh, and secure event logging. IC Role / Device Role / Timing Role: Secondary controller managing non-critical meter functions; uses RTC via ACLK and stores tamper logs in protected flash information memory segments. Use Value: Flash information memory (256B) retains logs across power cycles; security fuse prevents unauthorized firmware extraction; LPM4 enables zero-current standby during grid outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F1101AIDGVR | 1KB flash + 128B RAM; identical package, core, and peripheral set; lower memory density. | Suitable for simpler sensor nodes with minimal firmware footprint and no calibration storage needs. | Select when application code fits within 1KB and RAM usage stays below 128B - reduces cost without sacrificing low-power performance. |
| MSP430F1132IDGVR | 8KB flash + 256B RAM; adds 10-bit SAR ADC (12 channels); same 20-pin TVSOP package and pinout. | Required when analog signal digitization demands higher resolution or channel count than Comparator_A slope A/D can provide. | Choose when design requires true multi-channel ADC acquisition; note flash size increase enables more complex algorithms and data buffering. |
Compared with MSP430F1101AIDGVR, the MSP430F1121AIDGVR offers 3× more flash for firmware scalability and calibration storage; versus MSP430F1132IDGVR, it trades integrated ADC capability for lower cost and identical ultra-low-power behavior in comparator-based sensing.
Availability
MSP430F1121AIDGVR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial process sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSP430F1121AIDGVR 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 MSP430x11x1(A) product line targets ultralow-power portable measurement applications, combining mixed-signal integration, five low-power modes, and fast wake-up to maximize battery life in sensor and instrumentation systems.
FAQ
What is the maximum operating frequency of the MSP430F1121AIDGVR at 3.6 V?
The MSP430F1121AIDGVR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This applies when using the internal DCO or external crystal/resonator sources. The device maintains full functionality-including flash programming and peripheral operation-at this rate, with active-mode current scaling linearly per the datasheet's IAM = IAM[3 V] + 120 μA/V × (VCC−3 V) relationship.
Does the MSP430F1121AIDGVR support in-system programming without external hardware?
Yes, the MSP430F1121AIDGVR supports in-system programming via its built-in bootstrap loader (BSL), which operates over UART using P1.1 (TX) and P2.2 (RX). No external programmer is required - only a UART-to-USB adapter and TI-provided BSL host software. Flash programming via JTAG remains available for development and debug, but BSL enables field firmware updates without physical access to JTAG pins.
How many I/O pins does the MSP430F1121AIDGVR expose in the 20-pin TVSOP package?
The MSP430F1121AIDGVR exposes 14 I/O pins in the 20-pin TVSOP (DGV) package: Port 1 provides 8 pins (P1.0–P1.7), and Port 2 provides 6 pins (P2.0–P2.5). Although P2 has eight internal bits, only six are routed to package terminals. All 14 pins support individual direction control, interrupt enable, and edge-selectable triggering - confirmed by the functional block diagram and terminal functions table in SLAS241I.
What is the minimum supply voltage required to program the flash memory of the MSP430F1121AIDGVR?
The MSP430F1121AIDGVR requires a minimum supply voltage of 2.7 V to perform flash memory programming or erase operations, as stated in the "recommended operating conditions" section of SLAS241I. This is higher than the 1.8 V minimum for normal program execution. Attempting flash writes below 2.7 V may result in incomplete or corrupted programming; the device's flash control logic enforces this threshold via internal voltage monitoring.
Can the MSP430F1121AIDGVR operate with a 32.768 kHz crystal for real-time clock functionality?
Yes, the MSP430F1121AIDGVR supports 32.768 kHz crystal operation via the LFXT1 oscillator circuit connected to XIN and XOUT pins. In LF mode (XTS = 0), the crystal drives ACLK directly, enabling precise real-time clocking and low-power periodic wake-up from LPM3. The datasheet specifies 32.768 Hz as the nominal LFXT1 frequency and recommends a 5.1 MΩ resistor from XOUT to VSS when VCC < 2.5 V to ensure reliable startup.
MSP430F1121AIDGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- POR, 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:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F1121AIDGVR FAQ
1.How can I place an order for MSP430F1121AIDGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1121AIDGVR 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 MSP430F1121AIDGVR reliable?
The price and inventory of MSP430F1121AIDGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1121AIDGVR is usually 5 days.
3.What payment methods are accepted for MSP430F1121AIDGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1121AIDGVR transactions.
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MSP430F1121AIDGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1121AIDGVR 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 MSP430F1121AIDGVR?
For technical support, including MSP430F1121AIDGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1121AIDGVR requirements.
6.How does Aetrix verify that MSP430F1121AIDGVR is sourced from the original manufacturer or authorized distributors?
All MSP430F1121AIDGVR 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 MSP430F1121AIDGVR meets industry standards.
7.What is the process for return or replacement of MSP430F1121AIDGVR?
All MSP430F1121AIDGVR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1121AIDGVR, 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 MSP430F1121AIDGVR part is unused and in its original packaging.
Return procedure for MSP430F1121AIDGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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