Texas Instruments TM4C1231D5PMI

Overview

TM4C1231D5PMI from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 256 KB Flash, 32 KB SRAM, and integrated USB, CAN, PWM, ADC, and multiple UART/SPI/I2C peripherals. It serves as a main system controller in industrial motor drives, smart sensors, and programmable logic controllers requiring real-time deterministic control and mixed-signal integration.

For engineers reviewing the TM4C1231D5PMI datasheet, TM4C1231D5PMI pinout, TM4C1231D5PMI application, or TM4C1231D5PMI equivalent, key selection criteria include its 80 MHz Cortex-M4F core with FPU, 12-bit 1-MSPS ADC with 12 channels, USB 2.0 OTG support, CAN 2.0B interface, and -40°C to +85°C industrial temperature rating.

Technical Context

The TM4C1231D5PMI integrates a single-core ARM Cortex-M4F processor with hardware floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC). It supports Thumb-2 instruction set, bit-band memory access, and low-power sleep modes including deep-sleep and hibernate with RTC and battery-backed memory.

System-level integration includes a 400 kHz I2C master/slave, four 32-bit general-purpose timers (with PWM and capture capability), two watchdog timers, and a micro-DMA controller supporting 32-channel peripheral-to-memory transfers without CPU intervention.

Key Specifications

Pinout & Package

TM4C1231D5PMI is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per TI SPMS334E datasheet Rev E, June 2014.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM and STM32F401CEU6, TM4C1231D5PMI uniquely balances industrial bus integration (CAN + USB OTG), compact 64-pin LQFP packaging, and verified -40°C to +85°C operation - making it optimal for cost-sensitive, space-limited embedded controllers where fieldbus interoperability is mandatory.

Availability

TM4C1231D5PMI is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and programmable logic controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TM4C1231D5PMI 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies with broad industrial, automotive, and communications market reach.

The Tiva C Series - including TM4C1231D5PMI - was designed specifically for cost-sensitive, real-time embedded applications demanding integrated analog peripherals, deterministic timing, and industrial-grade reliability without external support components.

FAQ

What is the maximum operating frequency of the TM4C1231D5PMI?

The TM4C1231D5PMI operates at a maximum system clock frequency of 80 MHz, derived from its internal PLL driven by an external crystal (4–25 MHz) or internal oscillator. This frequency is fully supported across all operating conditions (-40°C to +85°C) and enables deterministic execution of real-time control algorithms with sub-microsecond interrupt latency.

Does the TM4C1231D5PMI include a hardware floating-point unit (FPU)?

Yes, the TM4C1231D5PMI integrates a single-precision IEEE 754-compliant hardware FPU within its ARM Cortex-M4F core. This enables efficient execution of trigonometric, exponential, and filtering operations - critical for motor control, sensor fusion, and digital power supply algorithms without software emulation overhead.

What USB capabilities does the TM4C1231D5PMI support?

The TM4C1231D5PMI supports USB 2.0 Full-Speed (12 Mbps) with On-The-Go (OTG) functionality. It includes a built-in USB PHY, integrated transceiver, and dedicated USB controller - enabling device, host, or OTG roles without external components. USB descriptors and enumeration are handled in ROM or application firmware.

How many analog input channels does the TM4C1231D5PMI ADC support?

The TM4C1231D5PMI features a 12-bit successive-approximation ADC with up to 12 external input channels, organized into four sample sequencers. Each sequencer supports hardware-triggered conversions, programmable sample-and-hold timing, and optional hardware averaging - enabling synchronized multi-channel acquisition for motor phase current or sensor array monitoring.

Is the TM4C1231D5PMI qualified for industrial temperature range operation?

Yes, the TM4C1231D5PMI is specified and tested for continuous operation from -40°C to +85°C ambient temperature. This qualification covers all core functionality including Flash programming, ADC accuracy, USB timing, and CAN bus arbitration - ensuring reliable deployment in factory automation, outdoor metering, and uncontrolled enclosure environments.