Texas Instruments MSP430F1101IPWR

Overview

MSP430F1101IPWR 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 MSP430F1101IPWR datasheet, MSP430F1101IPWR pinout, MSP430F1101IPWR application, or MSP430F1101IPWR equivalent, key selection criteria include its LPM4 standby current (0.1 μA), <6 μs wake-up time from standby, integrated slope A/D capability via I/O pins, and support for 32-kHz crystal or internal DCO clocking - all critical for energy-constrained embedded sensing.

Technical Context

The MSP430F1101IPWR 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 for 32-kHz crystals, and selectable SMCLK/ACLK/MCLK domains - enabling precise low-power timing control across five software-selectable low-power modes.

Peripherals include a 16-bit Timer_A3 with three independent capture/compare registers supporting PWM, interval timing, and input capture; an analog comparator with CA0/CA1 inputs and CAOUT output for slope ADC or battery monitoring; and dual 8-bit I/O ports (P1: 8 pins, P2: 6 pins) with individually configurable direction, interrupt edge select, and Schmitt-trigger inputs.

Key Specifications

Pinout & Package

Package: 20-pin Plastic Small-Outline Thin (TSSOP), PW suffix. Body width 4.4 mm, lead pitch 0.65 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1121IPWR and MSP430F2012IPW, the MSP430F1101IPWR offers the smallest memory footprint and strictest pin compatibility within the F11x1A family, making it optimal for cost-sensitive, space-constrained designs where minimal firmware and proven low-power behavior are prioritized over expandability or serial interface integration.

Availability

MSP430F1101IPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meter interfaces, and industrial battery monitors requiring stable component supply and long-term manufacturability.

Supply support for MSP430F1101IPWR 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 MSP430x1xx product line was engineered specifically for ultralow-power portable measurement and sensing applications, emphasizing extended battery life through aggressive power gating, fast wake-up, and integrated analog peripherals.

FAQ

What is the maximum operating frequency of the MSP430F1101IPWR at 3.6 V?

The MSP430F1101IPWR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This applies when executing code from flash memory and using the internal DCO or external crystal sources. The device's 16-bit RISC architecture delivers 125 ns instruction cycle time at this rate, enabling responsive real-time control in compact firmware.

Does the MSP430F1101IPWR support in-system programming without external hardware?

Yes, the MSP430F1101IPWR includes a factory-programmed Bootstrap Loader (BSL) that enables in-system programming via UART using only P1.1 (TX) and P2.2 (RX) pins. No external programmer or JTAG interface is required for field firmware updates, provided the BSL password has not been erased and the TEST pin remains unasserted during normal operation.

What are the absolute maximum ratings for VCC and I/O voltage on the MSP430F1101IPWR?

The absolute maximum VCC rating for the MSP430F1101IPWR is −0.3 V to 4.1 V relative to VSS. Any I/O pin voltage must remain within −0.3 V to VCC+0.3 V. Exceeding these limits risks permanent damage. For reliable operation, VCC must be maintained between 1.8 V and 3.6 V, and I/O signals should stay within the recommended logic thresholds defined in the electrical characteristics table.

Can the MSP430F1101IPWR perform analog-to-digital conversion without an external ADC?

Yes, the MSP430F1101IPWR supports single-slope analog-to-digital conversion using its on-chip analog comparator and Timer_A. By charging a capacitor through a resistive sensor and comparing against a reference, the device measures time-to-compare - effectively converting resistance or analog voltage to digital values with no external ADC required. This technique is documented in TI Application Report SLAA089.

Is the MSP430F1101IPWR pin-compatible with other devices in the MSP430F11x1A family?

Yes, the MSP430F1101IPWR shares identical pinout and package (20-pin TSSOP, PW) with MSP430F1111IPWR and MSP430F1121IPWR. All F11x1A variants use the same terminal functions, I/O mapping, and peripheral register layout, enabling drop-in memory upgrades - for example, replacing MSP430F1101IPWR with MSP430F1121IPWR requires only flash reprogramming, no PCB change.