Texas Instruments MSP430F1222IPWR

Overview

MSP430F1222IPWR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB flash, 256B RAM, 10-bit ADC, Timer_A3 with three capture/compare registers, and integrated USART0 supporting UART/SPI modes. It operates from 1.8 V to 3.6 V and achieves 200 µA active current at 1 MHz, enabling battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1222IPWR datasheet, MSP430F1222IPWR pinout, MSP430F1222IPWR application, or MSP430F1222IPWR equivalent, key selection criteria include its 28-pin TSSOP package, 22 I/O pins (including eight on Port P3), wake-up time under 6 µs from standby, integrated brownout protection, and programmable code security via fuse.

Technical Context

The MSP430F1222IPWR implements a 16-bit CPU with seven addressing modes and register-to-register execution in one cycle. Its basic clock module supports multiple sources: internal DCO (stabilizes <6 µs), 32-kHz crystal, high-frequency crystal, external resistor, or external clock - enabling flexible low-power timing architectures.

It integrates three peripheral domains: a 10-bit ADC10 with internal reference, sample-and-hold, autoscan, and data transfer controller (DTC); Timer_A3 with three independent capture/compare registers for PWM, input capture, and interval timing; and USART0 with dual-buffered UART/SPI operation - all accessible via memory-mapped SFRs and interrupt vectors at fixed addresses (0FFFEh–0FFE0h).

Key Specifications

Pinout & Package

Package: 28-pin Plastic TSSOP (PW), body size 9.7 mm × 4.4 mm, 0.65 mm pitch, exposed thermal pad connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1222IPWR, MSP430F1232IPW offers scalable code space while maintaining identical low-power behavior and peripheral set, whereas MSP430F1122IPW sacrifices serial interface and I/O count to reduce package size and cost - making it suitable only for stripped-down implementations.

Availability

MSP430F1222IPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F1222IPWR 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 investment in ultra-low-power architecture.

The MSP430x12x2 product line was designed specifically for battery-operated measurement and sensing applications demanding nanowatt-level sleep currents, fast wake-up, and integrated analog peripherals - targeting portable instrumentation, environmental monitoring, and energy harvesting systems.

FAQ

What is the maximum operating frequency of the MSP430F1222IPWR?

The MSP430F1222IPWR supports a maximum CPU clock frequency of 8 MHz, though typical active-mode operation at 1 MHz draws only 200 µA at 2.2 V. Its digitally controlled oscillator (DCO) is factory-trimmed for stability across voltage and temperature, and can be calibrated to achieve precise frequencies up to 8 MHz using the FLL+ module - confirmed in the SLAS361D datasheet Section 3.2.

Does the MSP430F1222IPWR support hardware UART communication?

Yes, the MSP430F1222IPWR includes USART0, a hardware peripheral that supports both asynchronous UART and synchronous SPI protocols. Pins P3.4 (UTXD0) and P3.5 (URXD0) provide dedicated UART transmit/receive functionality, with baud rate programmable via U0BR0/U0BR1 registers and modulation control in U0MCTL - as documented in Section 13 of SLAS361D.

How many analog input channels does the MSP430F1222IPWR ADC support?

The MSP430F1222IPWR ADC10 module supports eight analog input channels: A0 through A7. Channels A0–A4 are mapped to P2.0–P2.4; A5–A7 are assigned to P3.0, P3.6, and P3.7 respectively. All channels share the same 10-bit SAR core and internal reference, and can be scanned automatically via ADC10CTL1's CONSEQ bits - verified in the Terminal Functions table (Page 6) and ADC10 section (Page 13).

Is the MSP430F1222IPWR pin-compatible with other MSP430x12x2 devices in TSSOP packages?

Yes, the MSP430F1222IPWR is pin-compatible with MSP430F1232IPW in the 28-pin TSSOP (PW) package: identical pin functions, electrical characteristics, and memory map. However, it is not pin-compatible with MSP430x11x2 devices (20-pin) or QFN variants (RHB), as confirmed by the Pin Designation tables for MSP430x12x2 (Page 3) and package option matrix (Page 2).

What debug interfaces are supported by the MSP430F1222IPWR?

The MSP430F1222IPWR supports JTAG-based debugging via the TEST pin (Pin 1) and P1.x pins (TCK, TMS, TDI, TDO), compliant with IEEE 1149.1. It also supports Spy-Bi-Wire (2-wire JTAG) for reduced pin count. No SWD or ARM-style debug is supported. The BSL (bootstrap loader) provides UART-based firmware loading using P1.1 (TX) and P2.2 (RX), as detailed in Section 11 of SLAS361D.