Texas Instruments MSP430F412IRTDR

Overview

MSP430F412IRTDR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 4KB flash + 256B RAM, integrated 96-segment LCD driver, on-chip comparator, and FLL+ clock system. It operates from 1.8 V to 3.6 V, draws 200 μA at 1 MHz/2.2 V in active mode, and supports five power-saving modes - ideal for battery-powered handheld meters and sensor interfaces.

For engineers reviewing the MSP430F412IRTDR datasheet, MSP430F412IRTDR pinout, MSP430F412IRTDR application, or MSP430F412IRTDR equivalent, key selection criteria include its QFN-64 (RTD) package, Timer_A3 with three capture/compare registers, brownout detection, JTAG debugging support, and LCD segment drive capability without external bias circuitry.

Technical Context

The MSP430F412IRTDR implements a 16-bit RISC CPU with 125-ns instruction cycle time, constant generators, and seven addressing modes for high code efficiency. Its FLL+ module locks the DCO to multiples of ACLK (e.g., 32.768 kHz crystal), enabling sub-6 μs wake-up from standby mode.

It integrates Timer_A3 (three capture/compare registers), a single 16-bit timer, comparator_A with two analog inputs and output, and dedicated LCD control logic driving up to 96 segments using four COM lines and internal voltage divider - all managed via dedicated SFRs without port multiplexing overhead.

Key Specifications

Pinout & Package

Package: 64-pin QFN (RTD), 9 mm × 9 mm, 0.5 mm pitch, exposed thermal pad (VSS-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F413IRTDR and MSP430F415IRTDR, the MSP430F412IRTDR offers optimal cost/performance balance for fixed-function metering and display applications where 4KB flash suffices and dual-timer capability is unnecessary - reducing BOM cost without sacrificing core mixed-signal functionality.

Availability

MSP430F412IRTDR is available at Aetrix Electronics and suitable for handheld meters, portable sensors, and industrial panel displays requiring stable component supply across long-lifecycle embedded programs.

Supply support for MSP430F412IRTDR 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 over 50 years of innovation in low-power design.

The MSP430x41x product line was engineered specifically for ultra-low-power mixed-signal applications - combining precision analog peripherals, LCD control, and energy-efficient execution to extend battery life in portable measurement systems.

FAQ

What is the maximum operating frequency of the MSP430F412IRTDR?

The MSP430F412IRTDR achieves a 125-ns instruction cycle time, corresponding to an effective CPU clock speed of up to 8 MHz. This is derived from the FLL+ module's ability to lock the DCO to integer multiples of the ACLK source (e.g., 32.768 kHz crystal), enabling stable high-speed operation while maintaining ultralow power consumption. The MSP430F412IRTDR does not support external high-frequency crystals beyond XT1.

Does the MSP430F412IRTDR support JTAG debugging and in-circuit programming?

Yes, the MSP430F412IRTDR supports full JTAG-based debugging and programming via the TCK, TMS, TDI/TCLK, and TDO/TDI pins. These signals provide access to flash memory, RAM, and all special function registers for development, testing, and field updates. The device also includes a bootstrap loader (BSL) accessible through UART on P1.0/P1.1 for firmware updates without JTAG hardware.

How many LCD segments can the MSP430F412IRTDR drive, and what COM configurations are supported?

The MSP430F412IRTDR drives up to 96 LCD segments using four common outputs (COM0–COM3). It supports static, 2-mux, 3-mux, and 4-mux LCD configurations via dedicated control bits in the LCDCTL register. Segment outputs (S0–S47) and COM lines are managed entirely by hardware - no GPIO configuration or software timing loops are required for refresh.

What power-saving modes are available on the MSP430F412IRTDR, and how quickly can it wake up?

The MSP430F412IRTDR offers five software-selectable low-power modes (LPM0–LPM4). Wake-up from LPM3 or LPM4 to active mode takes less than 6 μs due to the fast-stabilizing DCO in the FLL+ module. In LPM4, only ACLK remains active; all clocks including the crystal oscillator are halted - achieving 0.1 μA current draw with RAM retention.

Is the MSP430F412IRTDR pin-compatible with other devices in the MSP430x41x family?

Yes, the MSP430F412IRTDR shares identical pinout and package (64-pin QFN RTD) with MSP430F413IRTDR, MSP430F415IRTDR, and MSP430F417IRTDR. All share the same terminal functions for I/O, JTAG, XIN/XOUT, COM/segment outputs, and power pins. However, peripherals such as Timer1_A5 and additional RAM are not present in the MSP430F412IRTDR - firmware must avoid accessing unsupported registers.