Texas Instruments TM4C123AH6PMI7R

Overview

TM4C123AH6PMI7R 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/I2C/SSI interfaces. It operates at 80 MHz, supports -40°C to +85°C industrial temperature range, and is used in motor control, industrial automation, and embedded HMI systems.

For engineers reviewing the TM4C123AH6PMI7R datasheet, TM4C123AH6PMI7R pinout, TM4C123AH6PMI7R application, or TM4C123AH6PMI7R equivalent, key selection criteria include its dual-CAN interface, hardware floating-point unit, on-chip ROM bootloader, USB device/host/OTG capability, and support for TivaWare™ software stack in real-time embedded designs.

Technical Context

The TM4C123AH6PMI7R integrates a 32-bit ARM Cortex-M4F core with single-precision FPU, memory protection unit (MPU), and NVIC supporting up to 80 interrupt lines. Its system-level architecture includes a 400 MHz system clock derived from PLL, configurable GPIOs with slew-rate control, and dedicated peripheral bus matrix enabling concurrent access to flash, SRAM, and peripherals.

Hardware debug is implemented via SWD/JTAG with full ARM Serial Wire Debug support, including watchpoint and breakpoint units. The microcontroller features a μDMA controller with 32-channel capability, synchronized with peripheral triggers, and supports scatter-gather transfers without CPU intervention for high-efficiency data movement.

Key Specifications

Pinout & Package

TM4C123AH6PMI7R is housed in a 64-pin LQFP package with exposed thermal pad (Pb-free, RoHS-compliant). Pin assignments follow TI's standardized Tiva C Series layout, supporting JTAG/SWD debug, USB D+/D−, CANH/CANL, and multiplexed peripheral functions per GPIO bank.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and RP2040, the TM4C123AH6PMI7R provides integrated CAN 2.0B and USB PHY in a single-package solution with guaranteed industrial temperature operation, making it optimal for space-constrained, protocol-diverse embedded control where BOM count and qualification effort must be minimized.

Availability

TM4C123AH6PMI7R is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interface panels, and automated test equipment requiring stable component supply across long production lifecycles.

Supply support for TM4C123AH6PMI7R 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 and embedded processing solutions for industrial, automotive, and communications markets since 1930.

The TM4C123AH6PMI7R belongs to TI's Tiva C Series microcontrollers, designed specifically for real-time embedded applications demanding integrated connectivity, analog precision, and deterministic control - especially in resource-constrained industrial environments.

FAQ

What is the maximum operating frequency of the TM4C123AH6PMI7R?

The TM4C123AH6PMI7R operates at a maximum system clock frequency of 80 MHz, achieved via internal PLL configuration from an external crystal (4–25 MHz) or internal oscillator. This frequency is sustained across the full industrial temperature range (-40°C to +85°C) and supports deterministic real-time execution of control loops and communication stacks. The TM4C123AH6PMI7R maintains timing compliance under all specified voltage and thermal conditions without derating.

Does the TM4C123AH6PMI7R support USB device, host, and OTG modes simultaneously?

Yes, the TM4C123AH6PMI7R integrates a full-speed USB 2.0 controller with on-chip PHY that supports device, host, and OTG modes in a single silicon implementation. Mode selection is controlled dynamically via software configuration of the USBPC register and session request protocol (SRP)/host negotiation protocol (HNP) logic. The TM4C123AH6PMI7R does not require external transceivers or mode-switching hardware.

How many CAN interfaces does the TM4C123AH6PMI7R include, and what protocol versions are supported?

The TM4C123AH6PMI7R includes two independent CAN modules compliant with ISO 11898-1 (2003) and supporting CAN 2.0A and CAN 2.0B protocols, including extended frame identifiers. Each module supports bit rates up to 1 Mbps and features dedicated message objects (32 per module), FIFO buffering, and automatic retransmission. The TM4C123AH6PMI7R does not support CAN FD.

What debug interfaces are available on the TM4C123AH6PMI7R?

The TM4C123AH6PMI7R supports both JTAG and ARM Serial Wire Debug (SWD) interfaces through dedicated pins (TCK, TMS, TDI, TDO, nTRST, SWDIO, SWCLK). SWD is the recommended interface for production programming and debugging due to its 2-pin footprint and full feature parity with JTAG. The TM4C123AH6PMI7R also supports boundary scan and real-time trace via TPIU when used with compatible debug probes.

Is the TM4C123AH6PMI7R pin-compatible with other devices in the TM4C123x family?

Yes, the TM4C123AH6PMI7R shares identical pinout and package (64-pin LQFP) with other TM4C123x variants including TM4C123GH6PM, TM4C123BH6PM, and TM4C123EH6PM. Differences are limited to flash size, SRAM allocation, and peripheral enablement - all managed via software configuration. This allows hardware reuse across firmware variants without PCB redesign. The TM4C123AH6PMI7R is fully pin-compatible within this family subset.