Texas Instruments MSP430F2111IPW

Overview

MSP430F2111IPW from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 2KB+256B flash memory, 128B RAM, a 16-bit Timer_A with three capture/compare registers, and an on-chip analog comparator for slope A/D conversion - deployed in battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F2111IPW datasheet, MSP430F2111IPW pinout, MSP430F2111IPW application, or MSP430F2111IPW equivalent, key selection criteria include active-mode current at 1 MHz (250 μA @ 2.2 V), standby-mode retention (0.7 μA), <1 μs wake-up time, 1.8–3.6 V supply range, and TSSOP-20 package compatibility with JTAG debugging and BSL serial programming.

Technical Context

The MSP430F2111IPW implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register instructions in one CPU cycle. Its basic clock module integrates a digitally controlled oscillator (DCO) calibrated to ±1% at 1/8/12/16 MHz, plus support for 32-kHz crystal and high-frequency external sources.

It features two 8-bit I/O ports (P1/P2) with individually configurable pullup/down resistors, edge-selectable interrupts, and peripheral mapping via P1SEL/P2SEL registers. The Comparator_A+ supports eight analog inputs (CA0–CA7), slope A/D conversion, and battery-voltage supervision without external components.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), body width 4.4 mm, lead pitch 0.65 mm, JEDEC MO-153 compliant. Thermal pad not present - no exposed pad connection required.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.

Compared with MSP430F2101IPW and MSP430F2121IPW, the MSP430F2111IPW provides optimal balance of memory headroom and cost for mid-complexity sensor firmware - avoiding under-provisioning while minimizing die-area-driven pricing premiums.

Availability

MSP430F2111IPW is available at Aetrix Electronics and suitable for smart sensor nodes, battery-powered metering, and industrial data loggers requiring stable component supply across extended product lifecycles.

Supply support for MSP430F2111IPW 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 specializing in analog, embedded processing, and connectivity technologies with decades of low-power MCU innovation.

The MSP430F21x1 series targets ultra-low-power portable measurement and sensing applications - emphasizing sub-μA standby, fast wake-up, and integrated analog functions to minimize external components.

FAQ

What is the maximum operating frequency of the MSP430F2111IPW?

The MSP430F2111IPW supports a maximum MCLK frequency of 16 MHz when VCC ≥3.3 V and duty cycle is 50% ±10%. At lower supply voltages (e.g., 2.2 V), the maximum reliable frequency drops to 6 MHz. All timing specifications - including Timer_A operation and flash programming - are validated against this rated frequency envelope, and the DCO is factory-calibrated at 1/8/12/16 MHz points for ±1% accuracy.

Does the MSP430F2111IPW support in-system programming without a JTAG interface?

Yes, the MSP430F2111IPW includes a UART-based Bootstrap Loader (BSL) that enables in-system programming via pins P1.1 (TXD) and P2.2 (RXD). This allows firmware updates using only a simple UART bridge, eliminating dependency on JTAG hardware. The BSL is protected by a user-configurable password and can be disabled via security key 0xAA55 written to address 0xFFDE - ensuring secure field updates for the MSP430F2111IPW.

What are the key differences between the MSP430F2111IPW and MSP430F2121IPW?

The MSP430F2111IPW has 2KB+256B flash and 128B RAM, while the MSP430F2121IPW offers 4KB+256B flash and 256B RAM - doubling both program storage and data memory. Peripheral sets, pinout, and ultra-low-power specs (e.g., 0.7 μA standby) are identical. Therefore, the MSP430F2111IPW is optimal for firmware under ~1.8KB, whereas the MSP430F2121IPW is required for larger applications like secure bootloaders or multi-sensor fusion algorithms.

Can the MSP430F2111IPW operate from a single 1.8 V supply?

Yes, the MSP430F2111IPW is fully specified to operate from 1.8 V to 3.6 V, with all peripherals functional at the minimum 1.8 V rail. Flash programming requires ≥2.2 V, but normal program execution, Timer_A operation, comparator function, and I/O control remain valid at 1.8 V. This enables direct interfacing with low-voltage sensors and energy-harvesting power supplies without intermediate regulation - a core design advantage of the MSP430F2111IPW.

How does the analog comparator in the MSP430F2111IPW support slope A/D conversion?

The MSP430F2111IPW's Comparator_A+ module uses an internal reference and ramp generator to perform slope-based analog-to-digital conversion: the comparator output toggles when the input voltage crosses a linearly increasing internal ramp. By measuring the time between start-of-ramp and toggle point using Timer_A, the MSP430F2111IPW derives a digital value proportional to the input voltage - eliminating need for external ADC components while maintaining 10–12 bit effective resolution in typical configurations.