Texas Instruments MSP430F1101IPW

Overview

MSP430F1101IPW from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 1KB 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 nodes and portable measurement systems.

For engineers reviewing the MSP430F1101IPW datasheet, MSP430F1101IPW pinout, MSP430F1101IPW application, or MSP430F1101IPW equivalent, key selection criteria include its 20-pin TSSOP (PW) package, LPM4 standby current of 0.1 μA, sub-6-μs wake-up from standby, integrated DCO oscillator, and flash-based in-system programmability without external voltage.

Technical Context

The MSP430F1101IPW implements a 16-bit CPU with seven addressing modes and constant generators for high code efficiency. Its basic clock module supports multiple sources: internal DCO (stabilizes in <6 μs), 32-kHz crystal, high-frequency crystal, resonator, or external clock - all configurable via BCSCTL1/2 and DCOCTL registers.

Peripherals include Timer_A3 with three independent capture/compare registers supporting PWM, interval timing, and input capture; Comparator_A with two analog inputs (CA0/CA1) and output (CAOUT); and dual 8-bit I/O ports (P1: 8 pins; P2: 6 pins), all with individually configurable direction, pullup/down, and edge-selectable interrupts.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), 0.65 mm pitch, body size 6.5 mm × 4.4 mm, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1101IPW, MSP430F1121IPW offers scalable code space without changing PCB layout, while MSP430F2131IPW adds integrated ADC and communication peripherals - both require firmware adaptation but retain identical power architecture and I/O compatibility.

Availability

MSP430F1101IPW is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, and smart meter tamper detection requiring stable component supply across extended production lifecycles.

Supply support for MSP430F1101IPW 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 over 90 years of innovation in low-power design.

The MSP430x11x1(A) product line was engineered specifically for ultralow-power portable measurement and sensing applications, emphasizing rapid wake-up, minimal active/standby current, and integrated analog peripherals to reduce BOM count.

FAQ

What is the maximum operating frequency of the MSP430F1101IPW at 3.6 V?

The MSP430F1101IPW supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V. This limit applies when using the internal DCO or external crystal/resonator sources. The device maintains full functionality-including flash programming, Timer_A operation, and comparator accuracy-within this range. Exceeding 8 MHz may cause timing violations or flash write failures. MSP430F1101IPW performance is validated per SLAS241I Rev. December 2008.

Does the MSP430F1101IPW support in-system programming without external hardware?

Yes, the MSP430F1101IPW supports in-system programming via its built-in Bootstrap Loader (BSL), which uses UART communication on P1.1 (TX) and P2.2 (RX). No external programmer or JTAG interface is required. The BSL is protected by a user-configurable password and enables field firmware updates using standard serial interfaces. MSP430F1101IPW BSL operation is documented in SLAA089 and requires no additional components beyond the UART link.

Can the MSP430F1101IPW perform analog-to-digital conversion without an external ADC?

Yes, the MSP430F1101IPW implements slope-based analog-to-digital conversion using its on-chip Comparator_A module and 16-bit Timer_A. By charging a capacitor through a known resistor and measuring time-to-compare threshold, it achieves effective resolution up to 12 bits. This technique eliminates the need for external ADCs in cost-sensitive sensor front-ends. MSP430F1101IPW slope A/D is detailed in Section 11 of SLAS241I.

What are the absolute maximum ratings for VCC and pin voltages on the MSP430F1101IPW?

The absolute maximum VCC rating is −0.3 V to +4.1 V relative to VSS. Any pin voltage must remain between −0.3 V and VCC + 0.3 V. Exceeding these limits risks permanent damage. These ratings are defined in SLAS241I Section 14 and apply regardless of operating mode. MSP430F1101IPW reliability depends on strict adherence to these limits - especially during hot-plug or ESD events.

Is the MSP430F1101IPW pin-compatible with other devices in the MSP430x11x1(A) family?

Yes, the MSP430F1101IPW shares identical pinout and package (20-pin TSSOP) with MSP430F1111IPW and MSP430F1121IPW. All three support the same peripheral mapping, register layout, and electrical characteristics. Firmware written for MSP430F1101IPW runs unmodified on the higher-memory variants, enabling seamless scalability. MSP430F1101IPW pin compatibility is confirmed in the DW/PW/DGV package diagram (SLAS241I Page 3).