Texas Instruments TM4C123AH6PMIR

Overview

TM4C123AH6PMIR from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, and integrated peripherals including USB 2.0, CAN, 8×PWM, 12-bit ADC (1MSPS), and multiple UART/SSI/I²C interfaces. It operates at up to 80 MHz and supports -40°C to +105°C industrial temperature range in a 64-pin LQFP package. It serves as a main system controller in motor drives, industrial PLCs, and smart sensors.

For engineers reviewing the TM4C123AH6PMIR datasheet, TM4C123AH6PMIR pinout, TM4C123AH6PMIR application, or TM4C123AH6PMIR equivalent, key selection considerations include its integrated USB PHY, dual CAN 2.0B controllers, deterministic real-time interrupt latency (<12 cycles), and TivaWare™ software support for rapid firmware development.

Technical Context

The TM4C123AH6PMIR integrates an ARM Cortex-M4F core with single-precision floating-point unit (FPU), enabling efficient signal processing and control math. Its memory subsystem includes 256 KB on-chip flash with ECC protection, 32 KB SRAM, and 2 KB EEPROM - all accessible via tightly coupled bus architecture with zero-wait-state operation at 80 MHz.

Peripherals are organized into clock-gated modules with configurable GPIO remapping: six UARTs (one with ISO 7816 and IR support), two CAN controllers, one USB 2.0 device/host/OTG controller with integrated PHY, and four 16/32-bit general-purpose timers with PWM and quadrature encoder support - all synchronized via a centralized system control block.

Key Specifications

Pinout & Package

TM4C123AH6PMIR is housed in a 64-pin LQFP package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin assignment follows TI's standardized Tiva C Series layout, supporting flexible peripheral mapping via GPIO commit registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and MSP432P401RIPZT, the TM4C123AH6PMIR uniquely balances industrial-grade temperature range, dual CAN, integrated USB PHY, and on-chip EEPROM - making it optimal for space-constrained, mixed-protocol edge controllers requiring field-upgradability and robustness.

Availability

TM4C123AH6PMIR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TM4C123AH6PMIR 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 solutions, with decades of experience in industrial, automotive, and communications markets.

The TM4C123AH6PMIR belongs to TI's Tiva C Series microcontrollers, designed specifically for real-time industrial automation, motor control, and intelligent sensing applications demanding high integration, reliability, and software ecosystem maturity.

FAQ

What is the maximum operating frequency of the TM4C123AH6PMIR?

The TM4C123AH6PMIR operates at a maximum system clock frequency of 80 MHz, achieved via its internal PLL that accepts a 4–25 MHz crystal or external clock source. This frequency is fully supported across the entire -40°C to +105°C temperature range with guaranteed timing margins, enabling deterministic real-time execution without dynamic frequency scaling.

Does the TM4C123AH6PMIR include an integrated USB transceiver?

Yes, the TM4C123AH6PMIR includes a full-speed USB 2.0 transceiver with integrated PHY, supporting device, host, and OTG modes. This eliminates the need for external USB transceivers or level shifters, reducing bill-of-materials cost and PCB complexity while maintaining full USB compliance per USB-IF certification requirements for the TM4C123AH6PMIR.

How many CAN interfaces does the TM4C123AH6PMIR support?

The TM4C123AH6PMIR integrates two independent CAN 2.0B controllers, each with dedicated message RAM, acceptance filtering, and programmable bit timing. Both controllers operate concurrently without CPU intervention, enabling dual-bus architectures such as primary/backup CAN networks or multi-domain vehicle subsystems in the TM4C123AH6PMIR.

What types of memory are included on-chip in the TM4C123AH6PMIR?

The TM4C123AH6PMIR includes 256 KB of flash memory with ECC protection, 32 KB of SRAM with parity checking, and 2 KB of EEPROM emulated in flash with wear-leveling. These memory resources are accessible via the AHB bus with zero-wait-state operation at 80 MHz, ensuring consistent performance for firmware, stack, and non-volatile parameter storage in the TM4C123AH6PMIR.

Is the TM4C123AH6PMIR qualified for industrial temperature operation?

Yes, the TM4C123AH6PMIR is fully specified and tested for operation from -40°C to +105°C ambient temperature. All electrical parameters - including flash programming voltage, ADC accuracy, USB timing, and CAN bit rate tolerance - are guaranteed across this range, making the TM4C123AH6PMIR suitable for deployment in harsh industrial environments without thermal derating.