Texas Instruments MSP430F1122IPWR

Overview

MSP430F1122IPWR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB flash, 256B RAM, 10-bit 200-ksps ADC, Timer_A3 with three capture/compare registers, and serial communication support via UART/SPI (not implemented in this variant). It operates from 1.8 V to 3.6 V and achieves active-mode current of 200 µA at 1 MHz/2.2 V, enabling battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1122IPWR datasheet, MSP430F1122IPWR pinout, MSP430F1122IPWR application, or MSP430F1122IPWR equivalent, key selection criteria include its 20-pin TSSOP package, absence of integrated USART0 (distinguishing it from MSP430x12x2), five low-power modes, 6 µs wake-up from standby, and DCO-based clock system with 32-kHz crystal support.

Technical Context

The MSP430F1122IPWR implements a 16-bit RISC CPU with 125 ns instruction cycle time, constant generators for code efficiency, and seven addressing modes. Its basic clock module integrates a digitally controlled oscillator (DCO), internal resistors, and external crystal/resonator support - enabling sub-6 µs wake-up from LPM3/LPM4.

It features two 8-bit I/O ports (P1: 8 pins, P2: 6 pins), no P3 port, and peripheral integration including ADC10 with internal reference, sample-and-hold, autoscan, and data transfer controller (DTC). The device lacks USART0 hardware - confirmed by functional block diagram and interrupt vector table exclusions.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (PW), 0.65 mm pitch, body size 6.5 × 4.4 mm. Thermal pad not present. Pin 1 marked by beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1132IPWR, the MSP430F1122IPWR trades flash capacity for cost reduction in fixed-function deployments; versus MSP430F1222IPWR, it sacrifices communication capability for minimal footprint and lower system BOM count.

Availability

MSP430F1122IPWR is available at Aetrix Electronics and suitable for portable sensor nodes, industrial data loggers, and medical wearables requiring stable component supply across multi-year production cycles.

Supply support for MSP430F1122IPWR 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 energy efficiency and system-level innovation.

The MSP430x11x2 product line targets ultralow-power portable measurement applications, emphasizing extended battery life through aggressive power gating, fast wake-up, and integrated mixed-signal peripherals.

FAQ

Does MSP430F1122IPWR support hardware UART or SPI communication?

No, MSP430F1122IPWR does not include USART0 hardware. Unlike the MSP430x12x2 family, the MSP430x11x2 series (including MSP430F1122IPWR) omits integrated UART/SPI peripherals. Serial communication must be implemented in software (bit-banged) or via external transceivers. This is confirmed by the functional block diagram, peripheral file map, and absence of U0TXBUF/U0RXBUF registers in the memory map.

What is the maximum operating frequency of MSP430F1122IPWR?

The MSP430F1122IPWR supports a maximum MCLK frequency of 8 MHz, derived from its digitally controlled oscillator (DCO) or external crystal sources. While the core executes instructions at 125 ns (8 MHz), the datasheet specifies reliable operation up to 8 MHz across the full 1.8–3.6 V supply range and −40°C to 85°C temperature range. Higher frequencies are not characterized or guaranteed.

Can MSP430F1122IPWR use an external 32.768 kHz crystal for real-time clock functionality?

Yes, MSP430F1122IPWR supports a 32.768 kHz crystal connected between XIN and XOUT pins to generate ACLK, which serves as the basis for real-time clock functionality. The basic clock module explicitly lists "32-kHz Crystal" as a supported configuration, and ACLK can drive Timer_A3 in continuous mode for precise timekeeping with typical accuracy of ±20 ppm when using a standard watch crystal.

Is MSP430F1122IPWR pin-compatible with MSP430F1222IPWR?

No, MSP430F1122IPWR is not pin-compatible with MSP430F1222IPWR. The MSP430F1122IPWR uses a 20-pin TSSOP package (PW), while MSP430F1222IPWR uses a 28-pin TSSOP package. Their pin counts, layouts, and peripheral mappings differ significantly - for example, P3 port signals and USART0 pins exist only on the 28-pin variant. Migration requires PCB redesign.

How is flash memory programmed on MSP430F1122IPWR?

Flash memory on MSP430F1122IPWR can be programmed via JTAG interface using standard tools (e.g., MSP-FET), or through the onboard bootstrap loader (BSL) using UART communication on P1.1 (TX) and P2.2 (RX). The BSL requires a specific password sequence and supports in-system programming without external voltage - all operations are performed at the standard VCC supply voltage (1.8–3.6 V).