Texas Instruments TM4C123FH6PMT

Overview

TM4C123FH6PMT from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, and integrated analog peripherals including 12-bit ADC (1 MSPS), dual 16-bit PWM modules, and USB 2.0 device interface. It operates at 80 MHz, supports -40°C to +105°C industrial temperature range, and targets real-time motor control and sensor hub applications.

For engineers reviewing the TM4C123FH6PMT datasheet, TM4C123FH6PMT pinout, TM4C123FH6PMT application, or TM4C123FH6PMT equivalent, key selection criteria include its single-cycle DSP instructions, hardware floating-point unit, 48-pin LQFP package with configurable GPIOs, and integrated USB PHY for embedded host/device connectivity.

Technical Context

The TM4C123FH6PMT integrates a 32-bit ARM Cortex-M4F core with FPU, supporting Thumb-2 instruction set and vector interrupt handling via NVIC. It features a memory-mapped peripheral bus with APB/APB2 interfaces, enabling deterministic access to UART, I²C, SSI, and timer modules.

Its system-level integration includes a programmable clock tree with PLL, multiple low-power sleep modes (Sleep, Deep-Sleep, Hibernate), and on-chip ROM bootloader supporting UART/USB firmware updates. The μDMA controller provides 32-channel arbitration for zero-CPU-overhead peripheral transfers.

Key Specifications

Pinout & Package

TM4C123FH6PMT is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are fully defined in TI's SPMS372E datasheet Section 1.4 and Table 1-1 (Pin Assignments).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401CEU6 and RP2040, the TM4C123FH6PMT offers unique integration of USB PHY, industrial-grade temperature range, and analog subsystem - making it optimal for space-constrained, mixed-signal industrial endpoints where BOM reduction and guaranteed operating margin are critical.

Availability

TM4C123FH6PMT is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, USB HID devices, and PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TM4C123FH6PMT 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 experience in industrial and automotive applications.

The Tiva C Series - including the TM4C123FH6PMT - was designed specifically for real-time embedded control applications demanding high analog integration, deterministic timing, and robust industrial qualification.

FAQ

What is the maximum operating frequency of the TM4C123FH6PMT?

The TM4C123FH6PMT operates at a maximum system clock frequency of 80 MHz, achieved using its internal PLL with an external 4–25 MHz crystal or precision oscillator. This frequency is sustained across the full -40°C to +105°C temperature range and supports deterministic real-time execution of control loops and signal processing algorithms within the TM4C123FH6PMT.

Does the TM4C123FH6PMT include a hardware floating-point unit?

Yes, the TM4C123FH6PMT integrates a full IEEE 754-compliant single-precision floating-point unit (FPU) as part of its ARM Cortex-M4F core. This enables efficient execution of trigonometric, logarithmic, and filtering operations without software emulation - a key capability confirmed in the TM4C123FH6PMT datasheet Section 1.3.1 and utilized in TivaWare math libraries.

Can the TM4C123FH6PMT operate without an external crystal?

Yes, the TM4C123FH6PMT can boot and run using its internal 16 MHz precision oscillator, eliminating the need for an external crystal during development or low-accuracy timing applications. However, for USB operation or precise timing (e.g., UART baud rates), an external 4–25 MHz crystal connected to PH0/PH1 is required - as specified in the TM4C123FH6PMT datasheet Section 1.3.8 and Section 5.2.5.

How much SRAM does the TM4C123FH6PMT provide, and is it parity-protected?

The TM4C123FH6PMT includes 32 KB of on-chip SRAM, all of which is protected by hardware parity checking. This feature detects single-bit errors in real time and triggers a fault exception, enhancing system reliability in industrial environments - a specification explicitly documented in the TM4C123FH6PMT datasheet Section 1.3.2 and Section 7.2.1.

What USB capabilities does the TM4C123FH6PMT support?

The TM4C123FH6PMT supports USB 2.0 full-speed (12 Mbps) device mode with an integrated PHY, 1 KB of dedicated endpoint RAM, and built-in USB stack support in ROM. It natively enumerates as a USB device without external transceivers and supports standard classes including CDC, HID, and MSC - as verified in the TM4C123FH6PMT datasheet Sections 1.3.3 and 13.1, and TI Application Report SPRAAL1.