Details, datasheet, quote on part number: MSP430F1121
CategorySemiconductors => Microcontrollers (MCU) => MSP430 ultra-low-power MCUs => MSP430F1x
Part familyMSP430F1121 16-Bit Ultra-Low-Power Microcontroller, 4kB Flash, 256B RAM, Comparator
Description16-Bit Ultra-Low-Power Microcontroller, 4kB Flash, 256B RAM, Comparator 20-SOIC -40 to 85
CompanyTexas Instruments, Inc.
DatasheetDownload MSP430F1121 datasheet
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  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
20DWSOICR-PDSO-G25TUBEM430F1121 7.512.82.351.27
Application notes
• MSP430 SMBus
This application report describes a software implementation of the system management bus (SMBus) for the MSP430 microcontroller. It includes all master protocols, an interrupt-driven slave, and master usage examples. SMBus is derived from the I2C and is co | Doc
• PWM DC Motor Control Using Timer A of the MSP430
This application report and its associated software demonstrate the control of a DC motor using pulse width modulation (PWM). The Timer A module, which independently generates a PWM output, is used to produce the control signal. | Doc
• Interfacing the MSP430x11x(1) and TLV0831 (Rev. A)
This application report describes how to interface an MSP430x11x(1) 16-bit RISC-like mixed-signal microcontroller and a TLV0831 8-bit A/D converter. This report is written for the MSP430x11x(1) family, but can be adapted to any MSP430 derivative. | Doc
• MSP430 Isolated FET Interface
This application report describes how to build an isolated FET interface for the MSP430 Flash Emulation Tool (FET). When developing and debugging line-powered MSP430applications such as motor control, electricity energy meters, power monitoring systems etc | Doc
• HDQ Protocol Implementation with MSP430 | Doc
• FSK Modulation and Demodulation With the Microcontroller MSP430
This application report describes a software program for performing V.23 FSK modem transceiver functions using an MSP430 microcontroller. It makes use of novel filter architecture to perform DSP functions on a processor with only shift and add capabilities | Doc
• MSP430 32-kHz Crystal Oscillators (Rev. D)
Selection of the right crystal, correct load circuit, and proper board layout are important for a stable crystal oscillator. This application report summarizes crystal oscillator function and explains the parameters to select the correct crystal for ultra- | Doc
• Powering the MSP430 from a High Voltage Input using the TPS62122 (Rev. C) | Doc
• Generation and Recognition of DTMF Signals With the Microcontroller MSP430
The first part of the Application Report describes the generation of DTMF signals using the Microcontroller MSP430. Following an explanation of the most important specifications which are involved, the theoretical and mathematical processes will be discuss | Doc
• Advanced Debugging Using the Enhanced Emulation Module (EEM) With CCS v6 (Rev. F) | Doc
• Simple 1.5 V Boost Converter for MSP430
A simple, efficient, low-cost, boost converter to take 1.5 V from a single type-AA alkaline battery to the operating voltage required by the MSP430 family of ultralow-power microcontrollers is described. Expected battery life is up to 1000 hours. | Doc
• Efficient MSP430 Code Synthesis for an FIR Filter
Digital filtering can be easily accomplished on the MSP430 using efficient multiplication. The tool accompanying this document automatically converts FIR filter coefficients to MSP430 assembly code that can be used in any application. Horner’s method and | Doc
• Wave Digital Filtering Using the MSP430
Digital filtering is an integral part of many digital signal processing algorithms. Digital filters are characterized as either recursive [infinite impulse response (IIR)] or non-recursive [finite impulse response (FIR)] filters. IIR filters require a smal | Doc
• MSP Code Protection Features
MSP microcontrollers (MCUs) offer a number of features to help control code accessibility in the device, to add different layers of code access management and protection strategies. These include features that can lock or password protect the JTAG/SBW acce | Doc
• Economic Voltage Measurement With the MSP430 Family
This application report describes voltage and current measurement methods using the MSP430 universal timer/port module. The report explains the two measurement methods (charge and discharge) and shows how to measure voltage and current. The equations for t | Doc
• 1.8V – 5.5V Input, High-Efficiency DCDC Converter Reference Design for MSP430 (Rev. B)
This reference design is presented to help application designers and others who are trying to use the MSP430 in a system with an input voltage in the range of 1.8 V to 5.5 V, and who must increase the application run time by making use of the complete batt | Doc
• Digital Fan Control With Tachometer Using MSP430
Digital Fan Control with Tachometer using MSP430 Application Report | Doc
• Spread-Spectrum Clock Source Using an MSP430
While spread-spectrum clocking has long since been used in processor and memory clock trees, there are many other clocked systems, such as power supplies or switch-mode amplifiers, that continue to use a single-frequency clock. This can, in turn, generate | Doc
• Using the TPS3619 with MSP430 Microcontrollers Can Reduce Sys Power Consumption (Rev. A)
The MSP430 series of microcontrollers are ideal in applications where battery life is critical. These microcontollers require only 0.1?A of current in low-power RAM retention mode; In this mode the microcontroller must have power to retain volatile memor | Doc
• Tiny DCDC Converter Reference Design (Rev. A)
This reference design is presented to help application designers and others who are trying to use the MSP430 in a system with an input voltage in the range of 3.6 V to 6 V with the primary design objective to minimize solution size as well as to maintain h | Doc
• AES128 – A C Implementation for Encryption and Decryption (Rev. A)
This application report describes the AES algorithm and the use of a suggested C implementation for AES encryption and decryption with MSP430.Note: This document may be subject to the export control policies of the local government. | Doc
• Interfacing TMS320C5000 DSP to MSP430 Mixed Signal Microcontroller (Rev. A)
The TMS320C5000™ family of digital signal processors (DSPs) features Host Port Interface Controllers (HPI) and Direct Memory Access Controllers (DMAC) for efficient data movement without any CPU involvement. The HPI enables the DSP to interface to host p | Doc
• MSP430 LFXT1 Oscillator Accuracy
This report details the factors that influence achievable accuracy of the low frequency oscillator, specifically for real-time clock (RTC) applications. The intent of this application report is to provide an understanding of MSP430-specific factors influen | Doc
• Interfacing the 3-V MSP430 to 5-V Circuits
The interfacing of the 3-V MSP430x1xx and MSP430x4xx microcontroller families to circuits with a supply of 5 V or higher is shown. Input, output and I/O interfaces are given and explained. Worse-case design equations are provided, where necessary. Some sim | Doc
• Programming a Flash-Based MSP430 Using the JTAG Interface (Rev. H)
This application report has been superseded by the document shown below. Information previously contained in this application report can be found by clicking on the following links.- MSP430 Programming Via the JTAG Interface User's Guide Download MSP430 P | Doc
• Mixing C and Assembler with the MSP430
This application note describes how C and assembler code can be used together within an MSP430 application. The combination of C and assembler benefits the designer by providing the power of a high-level language as well as the speed, efficiency, and low-l | Doc
• Implementing a UART Function with Timer_A3 (Rev. A)
This application report describes how to use timer_A3 to implement a UART function. The included examples are specifially for the MSP430x11x(1) family, but they can be adapted to any MSP430 family member incorporating timer_A. The UART function uses hardwa | Doc
• Efficient Multiplication and Division Using MSP430 | Doc
• I2C Interfacing of the MSP430 to a 24xx Series EEPROM
This application report and the associated software demonstrate how to interface an MSP430 microcontroller to an external EEPROM memory using the I2C bus standard. The circuit and software presented are adaptable to any MSP430 device, EEPROMs with other me | Doc
• ESD Diode Current Specification
This document explains the maximum ESD diode current specified for GPIO on MSP microcontrollers. Sometimes signals on specific pins exceed the supply of the MSP MCU. In such a case, the device can handle this overvoltage condition through the ESD diodes, b | Doc
• Implementing An Ultralow-Power Keypad Interface with MSP430
Often in applications with keypads, the condition can occur where a key can be held or stuck down, causing excess current consmption and reducing the battery life of a battery-operated product. This application report shows a solution. The keypad interfa | Doc
• MSP430 Embedded Application Binary Interface
This document is a specification for the ELF-based Embedded Application Binary Interface (EABI) for the MSP430 family of processors from Texas Instruments. The EABI defines the low-level interface between programs, program components, and the execution env | Doc
• Choosing an Ultra Low-Power MCU
This application report describes how to compare ultralow-power MCUs. It discusses the key differences between popular low-power MCUs and how to interpret features and specifications and apply them to application requirements. | Doc
• Interfacing the MSP430 and TLC549/1549 A/D Converters
This application report describes how to interface an MSP430 mixed-signal microcontroller with the TLC549 and TLV1549 3-volt A/D converters. This report is written for the MSP430x11x(1) family, but can be adapted to any MSP430 derivative. | Doc
• Boost DC/DC with Ultra-Low Shutdown Current (Rev. A)
This reference design is presented to help application designers and others who are trying to use the MSP430 in a system that requires a very low input voltage range while also maintaining high efficiency. Battery life is extended as well as a result of th | Doc
• Current Transformer Phase Shift Compensation and Calibration
This application report demonstrates a digital technique to compensate and calibrate the phase shift of a current (or voltage) transformer used in electric power of energy measurement. Traditional analog compensation is replaced by a digital finite impulse | Doc
• MSP430 Family Mixed-Signal Microcontroller Application Reports
MSP430 Metering Application Report | Doc
• Li-Ion Battery Charger solution using the MSP430 | Doc
• MSP430 Software Coding Techniques (Rev. A)
This application report covers software techniques and topics of interest to all MSP430 programmers. The first part of the document discusses the MSP430 standard interrupt-based code flow model, recommended for the vast majority of applications. The next p | Doc
• MSP430 Capacitive Single-Touch Sensor Design Guide
This application report discusses the design of RC-type capacitive single-touch sensors using the MSP430 microcontroller. The MSP430 has some unique features that make it suitable for interfacing with capacitive-touch sensors. The RC-type method does not n | Doc
• MSP430 Flash Memory Characteristics (Rev. A)
Flash memory is a widely used, reliable, and flexible nonvolatile memory to store software code and data in a microcontroller. Failing to handle the flash according to data-sheet specifications may result in unreliable operation of the application. This ap | Doc
• Understanding MSP430 Flash Data Retention
The MSP430 family of microcontrollers, as part of its broad portfolio, offers both read-only memory (ROM)-based and flash-based devices. Understanding the MSP430 flash is extremely important for efficient, robust, and reliable system design. Data retention | Doc
• CRC Implementation with MSP430
Cyclic Redundancy Code (CRC) is commonly used to determine the correctness of a data transmission or storage. This application note presents a solution to compute 16-bit and 32-bit CRCs on the ultra low-power TI MSP430 microcontroller for the bitwise algor | Doc
• Random Number Generation Using the MSP430
Many applications require the generation of random numbers. These random numbers are useful for applications such as communication protocols, cryptography, and device individualization.Generating random numbers often requires the use of expensive dedicated | Doc
Evaluation Kits
MSP-TS430DW28: MSP-TS430DW28 - 28-pin Target Development Board for MSP430F1x and MSP430F2x MCUs
MSP-TS430PW28: MSP-TS430PW28 - 28-pin Target Development Board for MSP430F1x and MSP430F2x MCUs


Features, Applications

Ultra-low power consumption - 400-A active mode - 1.3-A standby mode - 0.1-A off mode High throughput processor - 16-bit orthogonal RISC architecture - Most instructions executed within a single 200-ns cycle operating at 5 MHz - Seven different address modes for 51 (27 core) instructions Hardware multiplier Integrated 14-bit A/D converter Integrated LCD driver Integrated USART Various timers

From the beginning, the design objective of the MSP430 team was to focus on the ultra-low power consumption of the complete system. The goal was to create a microcontroller which consumes very little current in the sleep modes and performs the given tasks in the active mode as fast as possible. To reduce the current consumption of a system, the MSP430 allows designers the ability to influence the active current consumption and active time as well as sleep mode current consumption and sleep time. The active mode current consumption of the in a typical 3-V system. The time to wake-up from the sleep mode to a total functional system takes a maximum of 6 s. This

allows the be in sleep modes longer and eliminates unnecessary energy use in the active mode. The powerful 16-bit CPU core ensures a fast

execution of the tasks and therefore reduces the active time. This means that the higher the performance of the CPU core, the lower the system power

A full range of MSP430 evaluation and support tools are available and provide easy-to-use design solutions.

In a modern household, many electronic applications like TV sets or stereo systems are permanently in a standby mode. Assuming the total standby power in a household W, a country with 40 million households requires 400 MW just to supply the standby energy. This means that a mid sized power plant is working only to supply the standby energy for these parts. The is an ultra-low-power microcontroller family and can help to reduce this standby current. The typical current consumption in low-power mode is 1.3 A, where the device is still capable of displaying information on the LCD display or keeping a real-time clock updated. This ultra-low-power consumption is no limitation for the outstanding high processing capability. The 16-bit RISC CPU core can perform tasks like calculation of the energy, faster than conventional 4- and 8-bit microcontrollers. This combination sets a new benchmark of processing capability versus energy consumption. The MSP430 offers 1200 MIPS/Watt in active mode. Finally, the high integration of the MSP430 allows the user to build up a system with a minimum of external components. This leads to very cost competitive system solutions.

consumption. All MSP430 peripheral modules are specially designed to support these ultralow power features. The sleep modes offer a reduced current consumption even when some peripherals are still active. For example, in a simple real time clock (RTC), it is not necessary to keep the device in active mode. Another example, the system can operate from the 32-kHz (ACLK) clock instead of 1-4 MHz (MCLK) with the timers and LCD still active. These examples are benefits of the most often used low-power

mode 3 (LPM3) which consumes 1.3 A typically. The current consumption can be reduced down in LPM4 where the MSP430 is still capable of

processing external interrupts, for example from a connected keyboard. The sleep time can be maximized due to the fast wakeup from the low-power modes.

Active Mode 550 A with A/D 400 A without A/D CPU is active Various modules are active 1-4 MHz on

LP-Mode 0.1 A CPU is inactive Peripherals inactive 32 kHz off wake up from LPM4 only with external interrupt

LP-Mode 1.3 A CPU is inactive Peripherals active 32 kHz on all parameters typical at 3V

The MSP430 offers a variety of possibilities to reduce the cost of the complete system to a minimum. The use of the 32-kHz XTAL and the internal DCO/FLL eliminates the need for a second XTAL for the system frequency. Furthermore, a ceramic resonator can be used in place of the 32-kHz XTAL; or, the system can be operated without any external component for the clock generation at all. The low-power features of the MSP430 make it possible to choose a smaller battery for the application and still increase the system life due to the various power saving modes. High code efficiency leads to smaller memory sizes and drives cost down. The high integration of the device makes an external LCD driver or an external ADC unnecessary. This high level of integration saves system cost and lowers the failure rate of the system by reducing the device count. The ease-of-use MSP430 architecture and the development tools significantly improve the development time and speed up the time-tomarket.

16-bit RISC CPU The MSP430 CPU offers you much more than standard 4- and 8-bit microcontrollers. The 16-bit RISC core is built with a highly orthogonal structure. Every instruction can be used with each of the seven different addressing modes. The reduced instruction set consists of only 27 core instructions. However, the user has, due to the 24 additional emulated instructions the capability of using highly familiar instructions. For example, a familiar instruction like INC R4 is available to the firmware programmer and automatically emulated by the assembler with ADD #1,R4. This instruction will be executed like all other register to register instructions in only one cycle. The orthogonal architecture of the MSP430 CPU core makes the device extremely easy-to-use. Sixteen (16) registers are implemented in the CPU itself and contain the Program counter, the stack pointer, the Status Register and the Constant Generator (which contains the highly used constants and 8). This feature makes the MSP430 an extremely code efficient device using a lot less of the code space than conventional CISC machines. The remaining 12 registers are available for general usage.

R0, Program Counter PC R1, Stack Pointer SP R2, Status Register ST / Constant Generator CG R3, Constant Generator CG R4, General Purpose

The hardware multiplication module in the MSP430x33x configuration provides multiplications in less than one cycle. The two operands are moved into registers inside the multiplier module, and in the next cycle, the result can be read out.

Oscillator / FLL Module The clock network of the MSP430 offers the designer flexibility. The Digital Controlled Oscillator (DCO) generates the system frequency to 4 MHz. The 32-kHz oscillator, which operates with only a single 32-kHz crystal, can be used to provide a stable frequency over temperature and operating voltage. The

integrated Frequency Locked Loop (FLL) regulates the system frequency MCLK with the stable 32-kHz crystal frequency. It is even possible to operate the MSP430 without any crystal at all, disable the FLL and just use the DCO to generate the system clock. The product offers a fail-safe feature. If the crystal connection is broken, the MSP430 continues operation with the lowest possible frequency. The DCO starts operation a maximum 6 s after a reset or interrupt occurs. This provides a working system in a fraction of the time needed with conventional microcontrollers.


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