Texas Instruments TM4C123AH6PMI

Overview

TM4C123AH6PM from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, and integrated peripherals including USB 2.0 OTG, 8× PWM outputs, 12-bit ADC (up to 1MSPS), and dual CAN 2.0A/B controllers - deployed in industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the TM4C123AH6PM datasheet, TM4C123AH6PM pinout, TM4C123AH6PM application, or TM4C123AH6PM equivalent, key selection criteria include its 80 MHz CPU clock, 12-bit analog subsystem with hardware averaging, USB device/host/OTG support, and -40°C to +85°C industrial temperature grade.

Technical Context

The TM4C123AH6PM integrates a single-core ARM Cortex-M4F processor with FPU and memory protection unit (MPU), supporting Thumb-2 instruction set and deterministic real-time interrupt handling via NVIC with 8-level priority grouping. It implements a unified memory map with tightly coupled flash and SRAM, and supports low-power sleep modes with wake-on-peripheral-event capability.

Its system-level integration includes a programmable clock tree with PLL-based 80 MHz core clock, configurable GPIOs with slew-rate control and interrupt masking per pin, and μDMA controller with 32-channel arbitration supporting peripheral-to-memory, memory-to-peripheral, and memory-to-memory transfers without CPU intervention.

Key Specifications

Pinout & Package

TM4C123AH6PM is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad for enhanced heat dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and RA4M1, the TM4C123AH6PM offers balanced performance, integrated USB PHY, dual CAN, and industrial temperature range in a single-chip solution - ideal for cost-sensitive, fieldbus-connected embedded systems requiring minimal external components.

Availability

TM4C123AH6PM is available at Aetrix Electronics and suitable for industrial motor control, smart sensor gateways, USB human interface devices, and programmable logic controller I/O modules requiring stable component supply and long-term manufacturability.

Supply support for TM4C123AH6PM 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, delivering analog, embedded processing, and wireless technologies for industrial, automotive, and consumer applications.

The Tiva C Series - including the TM4C123AH6PM - was designed specifically for cost-sensitive, real-time embedded applications requiring high integration, USB connectivity, and industrial-grade reliability without external support components.

FAQ

What is the maximum operating frequency of the TM4C123AH6PM?

The TM4C123AH6PM operates at a maximum CPU 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 full industrial temperature range (-40°C to +85°C) and enables deterministic real-time execution of control algorithms and communication stacks. The TM4C123AH6PM maintains timing compliance under all specified voltage and thermal conditions without derating.

Does the TM4C123AH6PM include an integrated USB physical layer?

Yes, the TM4C123AH6PM includes a fully integrated USB 2.0 Full-Speed (12 Mbps) PHY with on-die transceivers, eliminating the need for external USB transceiver ICs. This integration supports USB device, host, and OTG modes directly from the MCU pins (USB0VBUS, USB0ID, USB0DP, USB0DM), reducing BOM count and PCB layout complexity. The TM4C123AH6PM's ROM bootloader also provides USB-based firmware update capability without requiring JTAG.

How many analog-to-digital converter (ADC) channels does the TM4C123AH6PM support?

The TM4C123AH6PM features a 12-bit successive-approximation ADC with up to 21 external input channels across two sample sequencers. It supports hardware averaging of up to 64 samples per conversion to improve effective resolution and reduce noise. The ADC operates at up to 1 MSPS with programmable trigger sources including timers, GPIO edges, and software commands - making it suitable for high-fidelity sensor acquisition in the TM4C123AH6PM-based designs.

What debug interfaces are supported by the TM4C123AH6PM?

The TM4C123AH6PM supports both JTAG and ARM Serial Wire Debug (SWD) interfaces for programming and real-time debugging. It includes a 4-pin SWD interface (SWCLK, SWDIO, nRESET, GND) compatible with standard ARM debug probes, and a 10-pin JTAG interface supporting boundary scan and full visibility into core registers, memory, and peripherals. Both interfaces are active simultaneously and retain functionality across all low-power sleep modes except deep-sleep with debug disabled.

Is the TM4C123AH6PM pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C123AH6PM is not universally pin-compatible with other Tiva C Series MCUs. While it shares the same 64-pin LQFP package footprint with some variants (e.g., TM4C123GH6PM), pin functions differ significantly across part numbers due to varying peripheral sets and routing constraints. For example, USB, CAN, and SSI signal assignments are not identical across the family. Migration requires verification of pin mapping, power domain connections, and peripheral register compatibility - the TM4C123AH6PM must be treated as a distinct design entry point.