Texas Instruments MSP430F427IPMR

Overview

MSP430F427IPMR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 32KB flash, 1KB RAM, three independent 16-bit sigma-delta ADCs with differential PGA inputs, integrated 128-segment LCD driver, and UART/SPI serial interface - designed for high-precision portable metering applications including energy meters and handheld weighing scales.

For engineers reviewing the MSP430F427IPMR datasheet, MSP430F427IPMR pinout, MSP430F427IPMR application, or MSP430F427IPMR equivalent, key selection criteria include its 1.8–3.6 V supply range, sub-µA LPM4 current (0.1 µA @ 25°C), <6 µs wake-up from standby, FLL+ clock system, and 64-pin LQFP package with dedicated analog input pins (A0.0± to A2.0±) and LCD segment outputs (S0–S31, COM0–COM3).

Technical Context

The MSP430F427IPMR implements a 16-bit CPU with constant generators and hardware multiplier, enabling efficient signal processing in battery-powered measurement systems. Its architecture supports five low-power modes (AM, LPM0–LPM4), with LPM3 and LPM4 optimized for LCD-driven applications using ACLK sourced from LFXT1 (32.768 kHz watch crystal).

Three SD16 sigma-delta ADC modules operate independently with programmable gain amplifiers, supporting differential inputs and internal reference (1.2 V or external), while the integrated LCD controller drives up to 128 segments with 4-backplane support (COM0–COM3) and configurable voltage levels (R03–R33).

Key Specifications

Pinout & Package

64-pin LQFP (PM package), 10 mm × 10 mm body size, 0.5 mm pitch. Pin functions validated per TI SLAS421B Rev. November 2016, Section 4.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F425IPMR and MSP430F423IPMR, the MSP430F427IPMR provides 2× and 4× more flash respectively - enabling robust firmware with calibration storage, secure boot, and field-upgradable communication stacks while retaining identical analog performance and power efficiency.

Availability

MSP430F427IPMR is available at Aetrix Electronics and suitable for energy metering, handheld weighing equipment, and portable utility meters requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial certification.

Supply support for MSP430F427IPMR 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 expertise in ultra-low-power design.

The MSP430F427IPMR belongs to the MSP430F42x mixed-signal microcontroller family, engineered specifically for high-precision, battery-operated measurement applications demanding integrated analog front-ends and extended runtime.

FAQ

What is the maximum operating frequency of the MSP430F427IPMR?

The MSP430F427IPMR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in Section 5.3 of the SLAS421B datasheet. At lower supply voltages (e.g., 1.8 V), the maximum frequency reduces to 4.15 MHz to maintain timing margins and reliability. This frequency is generated by the FLL+ module locked to either the internal DCO or external crystal sources.

Does the MSP430F427IPMR support external crystal oscillators?

Yes, the MSP430F427IPMR supports external crystals on XIN/XOUT pins: a 32.768 kHz watch crystal for LFXT1 (low-frequency mode) and crystals/resonators from 1–8 MHz for XT1 (high-frequency mode). The FLL+ uses these references to stabilize the DCO for precise MCLK/SMCLK generation - critical for ADC sampling consistency and UART baud rate accuracy.

How many analog input channels does the MSP430F427IPMR have?

The MSP430F427IPMR integrates three independent 16-bit sigma-delta ADC modules (SD16A0, SD16A1, SD16A2), each with dedicated differential analog input pairs: A0.0±, A1.0±, and A2.0±. These are physically separate pins on the 64-pin LQFP package and support programmable gain amplifier stages - enabling true simultaneous sampling of three isolated analog signals.

Can the MSP430F427IPMR drive a 128-segment LCD without external components?

Yes, the MSP430F427IPMR includes a fully integrated LCD controller capable of driving up to 128 segments using 4 commons (COM0–COM3). It provides internal resistor ladder bias generation (via R03–R33 pins) and software-configurable frame frequency - eliminating the need for external LCD bias ICs or external segment drivers in compliant display designs.

What debug interface does the MSP430F427IPMR support?

The MSP430F427IPMR supports standard 4-wire JTAG (TCK, TMS, TDI/TCLK, TDO/TDI) for full-featured emulation, flash programming, and real-time debugging. It also includes a UART-based bootloader (BSL) accessible via P2.4/P2.5, enabling firmware updates without JTAG hardware - useful for field maintenance and production line programming.