Texas Instruments MSP430F1111AIPWR

Overview

MSP430F1111AIPWR from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 2KB + 256B flash memory, 128B RAM, a 16-bit Timer_A with three capture/compare registers, an on-chip analog comparator, and 14 programmable I/O pins. It operates from 1.8 V to 3.6 V and achieves active-mode current of 160 μA at 1 MHz/2.2 V, enabling battery-powered sensor signal acquisition and processing in portable measurement systems.

For engineers reviewing the MSP430F1111AIPWR datasheet, MSP430F1111AIPWR pinout, MSP430F1111AIPWR application, or MSP430F1111AIPWR equivalent, key selection criteria include its 6 μs wake-up from standby mode, integrated slope A/D capability via I/O pins, flash-based in-system programmability without external voltage, and support for 32-kHz crystal, DCO, or external clock sources - all critical for energy-constrained embedded sensing nodes.

Technical Context

The MSP430F1111AIPWR implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register operations in one CPU cycle. Its basic clock module integrates a digitally controlled oscillator (DCO), LFXT1 oscillator (32-kHz crystal or resonator), and supports ACLK, SMCLK, and MCLK domains with independent gating control.

It features two 8-bit I/O ports (P1 with 8 pins, P2 with 6 externally available pins), each bit independently configurable for input/output/interrupt with edge-selectable triggering. The Comparator_A module enables precision slope A/D conversion and battery-voltage supervision, while Timer_A3 provides three capture/compare registers for PWM, interval timing, and event capture with interrupt capability per channel.

Key Specifications

Pinout & Package

Package: 20-pin Plastic Small-Outline Wide Body (SOWB), DW suffix. Pin count and layout match TI's standard 20-pin SOWB footprint (JEDEC MS-013AC), with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultralow-power mixed-signal microcontroller applications.

Compared with MSP430F1111AIPWR, the MSP430F1121AIPWR offers scalable memory within identical power/performance envelope, while the MSP430F2131IPW trades comparator-based slope A/D for a true 10-bit ADC and serial interface - making it suitable for higher-fidelity sensing but less optimal for minimal-BOM cost-sensitive nodes.

Availability

MSP430F1111AIPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial equipment monitors requiring stable component supply across long-lifecycle production programs.

Supply support for MSP430F1111AIPWR 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 power efficiency, reliability, and system-level integration.

The MSP430x11x1(A) product line was designed specifically for ultralow-power portable measurement applications - optimizing battery life through aggressive low-power modes, fast wake-up, and integrated analog peripherals that reduce external component count.

FAQ

What is the maximum operating frequency of the MSP430F1111AIPWR at 3.6 V?

The MSP430F1111AIPWR supports a maximum processor frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This applies to the MCLK signal driving the CPU core. At lower supply voltages (e.g., 1.8 V), the maximum frequency is reduced to 4.15 MHz to maintain timing margins and stability.

Does the MSP430F1111AIPWR support in-system programming without external high voltage?

Yes, the MSP430F1111AIPWR supports in-system programming via its onboard bootstrap loader (BSL) using UART communication at standard logic levels - no external programming voltage (VPP) is required. Flash memory can also be programmed through the JTAG interface using standard 3.3 V signaling.

How many I/O pins does the MSP430F1111AIPWR provide, and are they all individually configurable?

The MSP430F1111AIPWR provides 14 usable I/O pins: eight on Port 1 (P1.0–P1.7) and six on Port 2 (P2.0–P2.5). Each pin is independently configurable for input/output direction, pull-up/pull-down resistors, interrupt enable, and edge sensitivity (rising/falling), enabling flexible signal routing in compact sensor interfaces.

What analog-to-digital conversion methods are supported by the MSP430F1111AIPWR?

The MSP430F1111AIPWR does not include a dedicated SAR or sigma-delta ADC. Instead, it supports single-slope analog-to-digital conversion using the on-chip Comparator_A module and Timer_A - converting analog voltage to time duration, then to digital value. This method requires no external components and is optimized for resistive sensors like thermistors or potentiometers.

Is the MSP430F1111AIPWR pin-compatible with other devices in the MSP430F11x1A family?

Yes, the MSP430F1111AIPWR shares identical pinout and package (20-pin SOWB) with MSP430F1101AIPWR and MSP430F1121AIPWR. Firmware and hardware designs are interchangeable across these variants, differing only in flash/RAM capacity - enabling seamless scalability during development or production ramp.