Texas Instruments TM4C123BH6PMI7R

Overview

TM4C123BH6PMI7R 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× QEI modules, 12-bit ADC (up to 1MSPS), and dual CAN 2.0A/B controllers. It operates at 80 MHz and supports industrial temperature range (–40°C to +85°C) in a 64-pin LQFP package.

For engineers reviewing the TM4C123BH6PMI7R datasheet, TM4C123BH6PMI7R pinout, TM4C123BH6PMI7R application, or TM4C123BH6PMI7R equivalent, this page delivers verified electrical specs, validated peripheral integration, thermal performance data, real-world use cases in motor control and industrial HMI, and confirmed drop-in alternatives for design continuity.

Technical Context

The TM4C123BH6PMI7R integrates a single-core ARM Cortex-M4F CPU with hardware floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC). It features a 32-bit bus architecture with tightly coupled flash and SRAM, supporting deterministic real-time execution.

System-level integration includes a programmable system clock (up to 80 MHz), hibernation module with RTC and battery-backed memory, μDMA controller with 32-channel support, and synchronized analog-digital subsystems enabling simultaneous sampling and PWM generation for closed-loop motion control.

Key Specifications

Pinout & Package

TM4C123BH6PMI7R is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS368E datasheet Rev E (June 2014), Section 1.4 and Table 1-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123BH6PMI7R, TM4C123GH6PM offers extended thermal margin without design changes, while TM4C1294NCPDT trades CAN capability for Ethernet integration and higher compute throughput - both require PCB layout review due to package differences.

Availability

TM4C123BH6PMI7R is available at Aetrix Electronics and suitable for industrial motor control, smart building HMI, and automotive body electronics requiring stable component supply across multi-year production cycles.

Supply support for TM4C123BH6PMI7R 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 technologies, with decades of automotive and industrial qualification expertise.

The TM4C123 family was designed specifically for cost-sensitive, real-time embedded control applications demanding high peripheral integration, low-power hibernation, and robust industrial communications - targeting motor drives, PLCs, and intelligent sensors.

FAQ

What is the maximum operating frequency of the TM4C123BH6PMI7R?

The TM4C123BH6PMI7R 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 industrial temperature range (–40°C to +85°C) and enables deterministic execution of time-critical tasks like motor commutation and USB packet scheduling. The TM4C123BH6PMI7R maintains timing compliance without derating under worst-case voltage and temperature conditions.

Does the TM4C123BH6PMI7R include a hardware floating-point unit?

Yes, the TM4C123BH6PMI7R integrates a full IEEE 754-compliant single-precision floating-point unit (FPU) as part of its ARM Cortex-M4F core. This allows native execution of floating-point arithmetic instructions without software library overhead, significantly accelerating sensor fusion, PID control loops, and FFT-based signal analysis. The FPU is accessible through standard CMSIS-DSP libraries and supported in TI's TivaWare C Series software.

Can the TM4C123BH6PMI7R support USB device and host modes simultaneously?

No, the TM4C123BH6PMI7R implements a single USB 2.0 OTG controller that supports device, host, or OTG operation-but only one mode active at a time. Mode selection is configured at initialization via the USBPC register and requires physical connection detection (e.g., ID pin state for OTG). The TM4C123BH6PMI7R does not support concurrent device and host stacks; switching modes requires software reinitialization and may interrupt ongoing transfers.

What is the purpose of the hibernation module in the TM4C123BH6PMI7R?

The hibernation module in the TM4C123BH6PMI7R enables ultra-low-power sleep states with selective retention of RTC, battery-backed RAM (2 KB), and wake-up sources (GPIO, RTC match, external interrupt). In hibernate mode, typical current draw is <1 µA, allowing years of operation on a CR2032 coin cell. The module operates independently of the main power domain and retains state even during main VDD removal, making it ideal for battery-backed data loggers and remote sensors.

How many independent PWM generators does the TM4C123BH6PMI7R support?

The TM4C123BH6PMI7R supports eight independent PWM generator blocks, each capable of producing two complementary PWM signals with programmable dead-time insertion. This yields 16 total PWM outputs, configurable for center-aligned or edge-aligned operation. Each generator includes fault inputs for immediate shutdown on overcurrent events-essential for safe motor drive implementation. The TM4C123BH6PMI7R's PWM subsystem is synchronized to the system clock and supports hardware-triggered updates from ADC conversion completion.