Texas Instruments MSP430F438IPNR

Overview

MSP430F438IPNR from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller with 48KB Flash, 2KB RAM, integrated 12-bit ADC, dual 16-bit timers (Timer_A3 and Timer_B3), USART0 supporting UART/SPI, on-chip LCD driver for up to 128 segments, and supply voltage supervisor - designed for battery-powered portable measurement systems requiring long runtime and analog integration.

For engineers reviewing the MSP430F438IPNR datasheet, MSP430F438IPNR pinout, MSP430F438IPNR application, or MSP430F438IPNR equivalent, key selection considerations include its 1.8–3.6 V operation, <6 µs wake-up from LPM4, 300 µA active current at 1 MHz/2.2 V, integrated LCD drive capability, and JTAG + BSL programming support.

Technical Context

The MSP430F438IPNR implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions in one cycle. Its FLL+ clock system supports ACLK (32.768 kHz crystal or HF source), MCLK (CPU clock), and SMCLK (peripheral clock), with DCO stabilization in under 6 µs.

It integrates a single-channel DMA controller for autonomous data movement (e.g., ADC12 → RAM), a 12-bit SAR ADC with internal reference and autoscan, and a dedicated LCD controller supporting static/2–4-MUX displays. Peripheral interrupt vectors are fixed in upper memory (0xFFFE–0xFE0), with priority-encoded maskable and nonmaskable sources.

Key Specifications

Pinout & Package

Package: 80-pin plastic QFP (PN), 12 × 12 mm, 0.5 mm pitch, surface-mount. Pinout validated per SLAS713 datasheet (June 2010) for MSP430F438IPN variant; MSP430F438IPNR shares identical pin mapping and function assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F437IPNR, the MSP430F438IPNR provides 16KB more Flash for feature-rich UIs or larger calibration tables; versus MSP430F449IPZR, it offers full 8-channel analog input (P6.0–P6.7) in an 80-pin package optimized for LCD-intensive applications.

Availability

MSP430F438IPNR is available at Aetrix Electronics and suitable for handheld meters, digital thermostats, and remote controls requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F438IPNR 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 low-power microcontrollers and signal-chain solutions.

The MSP430F43x product line targets portable, battery-operated measurement and control applications - emphasizing ultralow power, integrated analog peripherals, and LCD support for human-interface-rich devices.

FAQ

What is the maximum operating frequency of the MSP430F438IPNR?

The MSP430F438IPNR does not specify a maximum system clock frequency in its datasheet; instead, it guarantees correct operation up to 8 MHz via its FLL+ module. The DCO can be configured to deliver MCLK frequencies up to 8 MHz while maintaining stability and meeting timing specifications across the full 1.8–3.6 V supply range. This allows the MSP430F438IPNR to execute instructions at up to 8 million cycles per second when required for burst-mode processing.

Does the MSP430F438IPNR support hardware UART with automatic baud rate detection?

No, the MSP430F438IPNR USART0 module does not include automatic baud rate detection. It supports standard UART operation with programmable clock dividers for common baud rates (e.g., 9600, 19200, 115200), but requires known clock source accuracy and manual configuration of UBRx and UMCTLx registers. The MSP430F438IPNR relies on external crystal or calibrated DCO for timing precision, and baud rate must be set explicitly in firmware.

Can the MSP430F438IPNR drive a 4-MUX LCD with 32 commons and 4 segments per common?

Yes, the MSP430F438IPNR's integrated LCD driver supports exactly this configuration: 4 commons (COM0–COM3) and up to 32 segments per common yields 128 total segments. The device provides dedicated segment outputs (S0–S31, plus S10–S29, S32–S47 per pin listing) and common outputs, with programmable bias and frame frequency control - enabling direct drive of 4-MUX LCDs without external bias resistors or drivers.

What debug interfaces are supported by the MSP430F438IPNR?

The MSP430F438IPNR supports JTAG (via TCK, TMS, TDI/TCLK, TDO/TDI pins) for full-featured debugging, flash programming, and boundary-scan testing. It also supports Spy-Bi-Wire (2-wire JTAG subset) for reduced pin count debugging. The bootstrap loader (BSL) provides UART-based programming via P1.0/P1.1, but does not support real-time debugging - only flash/RAM loading.

Is the MSP430F438IPNR RoHS compliant and halogen-free?

Yes, the MSP430F438IPNR is RoHS compliant and halogen-free per Texas Instruments' official product change notifications and packaging documentation. TI confirms lead-free matte tin finish on terminals and compliance with JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for the 80-pin QFP package, meeting industrial and consumer environmental requirements.