Texas Instruments TM4C123BH6PMIR

Overview

TM4C123BH6PMIR 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 generators, 2× CAN controllers, and a 12-bit 1-MSPS ADC. It operates at up to 80 MHz and supports -40°C to +85°C industrial temperature range in a 64-pin LQFP package. It serves as a main system controller in motor control, industrial automation, and embedded HMI applications.

For engineers reviewing the TM4C123BH6PMIR datasheet, TM4C123BH6PMIR pinout, TM4C123BH6PMIR application, or TM4C123BH6PMIR equivalent, key selection considerations include its integrated USB PHY, dual CAN 2.0B support, hibernation module with RTC and battery-backed memory, and hardware floating-point unit for real-time signal processing tasks.

Technical Context

The TM4C123BH6PMIR integrates an ARM Cortex-M4F core with single-precision FPU, 256 KB on-chip flash (with error correction), and 32 KB SRAM. Its system-level integration includes a 200-MHz system clock via PLL, configurable GPIOs with slew-rate control, and a μDMA controller supporting 32 channels with scatter-gather capability.

Peripherals include two independent CAN 2.0B controllers with message objects, eight 16/32-bit general-purpose timers with PWM and capture modes, and a 12-bit ADC with four sample sequencers and hardware averaging. Debug is supported via SWD/JTAG with serial wire trace and real-time watchpoints.

Key Specifications

Pinout & Package

TM4C123BH6PMIR is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS368E datasheet Rev E (June 2014), with dedicated VDD/VSS pairs, JTAG/SWD debug pins, and multiplexed peripheral signals routed to GPIO banks A–K.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and RA4M1, the TM4C123BH6PMIR uniquely combines industrial-grade CAN, integrated USB PHY, and hibernation with battery-backed RAM - making it optimal for cost-sensitive, low-power, fieldbus-connected edge controllers where PCB space and BOM simplicity are critical.

Availability

TM4C123BH6PMIR is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, portable medical monitors, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for TM4C123BH6PMIR 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 wireless technologies with decades of automotive and industrial qualification experience.

The TM4C123BH6PMIR belongs to TI's Tiva C Series microcontrollers, designed specifically for cost-effective, real-time control applications demanding integrated connectivity (CAN, USB), analog precision, and low-power hibernation in harsh environments.

FAQ

What is the maximum operating frequency of the TM4C123BH6PMIR?

The TM4C123BH6PMIR operates at a maximum system clock frequency of 80 MHz, achieved using an internal PLL that multiplies the input crystal or oscillator frequency. This speed delivers over 100 DMIPS of performance and supports real-time execution of control loops, communication stacks, and signal processing routines without external acceleration. The TM4C123BH6PMIR maintains timing integrity across its full industrial temperature range (-40°C to +85°C).

Does the TM4C123BH6PMIR include an integrated USB physical layer?

Yes, the TM4C123BH6PMIR integrates a full-speed USB 2.0 OTG physical layer (PHY) with D+/D− transceivers, VBUS sensing, and session request logic. This eliminates the need for an external USB PHY chip, reducing bill-of-materials cost and PCB area. The TM4C123BH6PMIR supports both device and host roles and is compatible with standard USB device class drivers on Windows, Linux, and macOS platforms.

How much SRAM and flash memory does the TM4C123BH6PMIR provide?

The TM4C123BH6PMIR includes 32 KB of on-chip SRAM and 256 KB of on-chip flash memory. The flash memory implements error-correcting code (ECC) for enhanced reliability in industrial environments, and both memory blocks are accessible via the processor's unified memory map. This memory configuration supports complex firmware with real-time task scheduling, communication protocol stacks, and local data buffering - all within a single-chip solution.

What communication interfaces are available on the TM4C123BH6PMIR?

The TM4C123BH6PMIR provides two CAN 2.0B controllers, eight UARTs, two I²C modules, two SPI modules, and one USB 2.0 OTG interface. Each CAN controller supports 32 message objects and programmable filtering, enabling robust fieldbus networking. The UARTs support IrDA, ISO 7816, and modem handshaking, while the USB interface includes an integrated PHY. These interfaces allow the TM4C123BH6PMIR to serve as a central protocol gateway in heterogeneous embedded systems.

Is the TM4C123BH6PMIR suitable for low-power applications?

Yes, the TM4C123BH6PMIR includes a dedicated hibernation module with real-time clock (RTC), 2 KB of battery-backed SRAM, and wake-on-external-interrupt capability. In hibernate mode, it draws as little as 1.7 µA from a backup coin cell while retaining critical state. Combined with run-time clock gating and multiple sleep modes (sleep, deep-sleep, hibernate), the TM4C123BH6PMIR delivers optimized energy efficiency for battery-operated and energy-harvesting applications.