Texas Instruments MSP430FG477IPN

Overview

MSP430FG477IPN from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 32 KB flash, 2 KB RAM, a 16-bit sigma-delta ADC with five differential inputs, dual 12-bit DACs, two configurable op-amps, dual 16-bit timers (Timer_A and Timer_B), two USCI modules (UART/I²C/SPI), and integrated LCD driver supporting up to 128 segments - deployed in handheld meters, thermostats, and analog sensor systems.

For engineers reviewing the MSP430FG477IPN datasheet, MSP430FG477IPN pinout, MSP430FG477IPN application, or MSP430FG477IPN equivalent, key selection criteria include its 80-pin LQFP package, 1.8–3.6 V supply range, sub-1 µA LPM4 current, real-time clock capability, and on-chip LCD bias generation - critical for battery-powered measurement and display interfaces.

Technical Context

The MSP430FG477IPN implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling wake-up from standby mode in under 6 µs. Its memory-mapped peripherals include SD16_A (16-bit sigma-delta ADC) with internal reference and programmable gain, and dual 12-bit DACs with independent output buffers and reference options.

It integrates two fully configurable operational amplifiers (OA0/OA1) with switchable input/output routing, supporting transimpedance, difference, and instrumentation configurations. The LCD_A module provides direct drive for static and 4-mux segmented displays using on-chip charge-pump voltage generation (V1–V4).

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FG477IPN, MSP430FG4619IPN offers greater flash headroom while maintaining pin and peripheral compatibility, whereas MSP430F6736IPZ trades LCD/analog integration for metrology-specific enhancements - making MSP430FG477IPN optimal for cost-sensitive, display-integrated sensor controllers.

Availability

MSP430FG477IPN is available at Aetrix Electronics and suitable for handheld meters, thermostats, analog sensor systems, and digital motor control applications requiring stable component supply across long-lifecycle industrial programs.

Supply support for MSP430FG477IPN 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 low-power innovation and industrial reliability.

The MSP430FG47x product line was designed specifically for ultra-low-power, analog-intensive embedded applications - integrating precision data converters, LCD drivers, and real-time clock functionality into a single chip for portable and battery-operated measurement devices.

FAQ

What is the maximum operating frequency of the MSP430FG477IPN at 3.3 V?

The MSP430FG477IPN supports a maximum system clock (MCLK) frequency of 8 MHz at 3.3 V, as specified in the Recommended Operating Conditions table. This frequency is achieved using the DCO oscillator with calibration; external crystals (LFXT1/XT2) operate up to 8 MHz but require appropriate load capacitance and stability design. The 8-MHz limit ensures reliable timing across the full –40°C to 85°C temperature range.

Does the MSP430FG477IPN support hardware UART with automatic baud-rate detection?

Yes, the MSP430FG477IPN supports automatic baud-rate detection in USCI_A0 UART mode. This feature enables robust communication initialization without prior knowledge of the host's transmission speed, using start-bit edge timing analysis. It is implemented entirely in hardware and requires no CPU intervention - a key advantage in low-power remote control and sensor node applications where the MSP430FG477IPN must respond quickly to incoming commands.

Can the MSP430FG477IPN drive a 4-mux LCD without external bias circuitry?

Yes, the MSP430FG477IPN can drive a 4-mux LCD directly using its integrated LCD_A module. It generates all four required bias voltages (V1–V4) internally via a charge-pump circuit, with LCDCAP pin connecting the external capacitor. The R03–R33 pins route these voltages to segment lines, and COM0–COM3 serve as backplane outputs - eliminating need for external LCD bias ICs or resistor networks in designs targeting up to 128 segments.

What are the key differences between the MSP430FG477IPN and MSP430FG479IPN?

The MSP430FG477IPN and MSP430FG479IPN share identical peripherals, pinout (80-pin PN), and package dimensions, differing only in flash memory size: 32 KB + 256 B for MSP430FG477IPN versus 60 KB + 256 B for MSP430FG479IPN. Both have 2 KB RAM and identical analog subsystems (SD16_A, DAC12, OA0/OA1). Firmware developed for MSP430FG477IPN runs unchanged on MSP430FG479IPN, making the latter a drop-in upgrade path when larger code space is needed.

Is the MSP430FG477IPN qualified for automotive applications?

No, the MSP430FG477IPN is not AEC-Q100 qualified and is rated for industrial temperature range (–40°C to 85°C), not automotive (–40°C to 125°C). It lacks automotive-specific qualification testing, extended temperature validation, and PPAP documentation. For automotive cabin controls or body electronics requiring AEC-Q100 Grade 2 compliance, TI recommends the MSP430FR6989 or MSP430F5638 families - not the MSP430FG477IPN.