Texas Instruments MSP430F477IPNR

Overview

MSP430F477IPNR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 32 KB flash, 2 KB RAM, a 16-bit sigma-delta ADC with five differential inputs, a 12-bit DAC, dual 16-bit timers (Timer_A and Timer_B), two USCI modules (UART/I²C/SPI), and integrated LCD driver supporting up to 160 segments - designed for battery-powered metering and sensor interface applications.

For engineers reviewing the MSP430F477IPNR datasheet, MSP430F477IPNR pinout, MSP430F477IPNR application, or MSP430F477IPNR equivalent, key selection considerations include its 80-pin QFP (PN) package, 1.8–3.6 V supply range, sub-1 µA LPM3 current with RTC and LCD enabled, 262 µA active-mode current at 1 MHz/2.2 V, and support for precision analog measurement in handheld meters and thermostats.

Technical Context

The MSP430F477IPNR 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 sigma-delta ADC (SD16_A) includes internal reference, programmable gain, and built-in temperature sensing, while the LCD_A module integrates a regulated charge pump and supports static and 4-mux segment drive.

It features dual USCI peripherals: USCI_A0 supports enhanced UART with auto-baud detection and IrDA, plus SPI; USCI_B0 supports I²C and SPI. The device uses separate analog (AVCC/AVSS) and digital (DVCC/DVSS) supply domains, with dedicated pins for LCD voltage levels (V1–V4) and COM outputs for multiplexed display control.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm, with exposed thermal pad (not electrically connected). Pinout conforms to TI's standardized MSP430F47x PN package layout, supporting full peripheral mapping including 48 general-purpose I/O pins, 5 SD16_A analog input pairs, LCD segment/backplane drivers, and JTAG debugging interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F478IPNR and MSP430F479IPNR, the MSP430F477IPNR delivers identical analog performance, power efficiency, and peripheral set at the lowest flash density - making it optimal for cost-sensitive, functionally complete metering designs where firmware fits within 32 KB.

Availability

MSP430F477IPNR is available at Aetrix Electronics and suitable for smart energy metering, portable handheld meters, and thermostat control units requiring stable component supply and long-term industrial availability.

Supply support for MSP430F477IPNR 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 leadership in ultra-low-power microcontrollers.

The MSP430F477IPNR belongs to the MSP430F47x metrology-optimized microcontroller line, engineered specifically for high-accuracy, battery-operated measurement systems requiring integrated sigma-delta ADC, LCD drive, and real-time clock functionality.

FAQ

What is the maximum system clock frequency supported by the MSP430F477IPNR?

The MSP430F477IPNR supports a maximum system clock (MCLK) frequency of 4.15 MHz at 1.8 V and 8 MHz at 2.5 V or higher, as specified in the Recommended Operating Conditions table. This DCO-derived clock enables deterministic timing for metrology sampling and real-time display updates without external high-frequency crystals.

Does the MSP430F477IPNR support hardware real-time clock (RTC) functionality?

Yes, the MSP430F477IPNR includes a Basic Timer module with dedicated RTC capability, supporting calendar mode (year/month/day/hour/minute/second), alarm interrupts, and automatic leap-year compensation - all while operating in LPM3 at sub-µA current with ACLK sourced from a 32.768 kHz crystal.

How many LCD segments can the MSP430F477IPNR drive, and what drive methods are supported?

The MSP430F477IPNR's LCD_A module drives up to 160 segments using static, 2-mux, 3-mux, or 4-mux configurations. It provides four COM outputs (COM0–COM3) and dedicated segment pins (S0–S160), with an integrated regulated charge pump (LCDCPEN = 0) generating V1–V4 LCD bias voltages from a single supply.

What analog input channels does the SD16_A ADC support on the MSP430F477IPNR?

The SD16_A ADC on the MSP430F477IPNR supports five differential analog input channels: A0±, A1±, A2±, A3±, and A4±. Each pair maps to dedicated pins (e.g., P6.0/P6.1 for A0±), and the module includes internal 1.2 V reference, programmable gain (1×/2×/4×/8×), and built-in temperature sensor for self-calibration.

Is the MSP430F477IPNR pin-compatible with other devices in the MSP430F47x family?

Yes, the MSP430F477IPNR is pin-compatible with the MSP430F478IPNR and MSP430F479IPNR in the 80-pin QFP (PN) package - sharing identical pin assignments, peripheral mappings, and electrical characteristics, allowing drop-in replacement for flash-capacity upgrades without PCB redesign.