Texas Instruments TM4C123FH6PMI

Overview

TM4C123FH6PMI 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), PWM, UART, I²C, SSI, and USB 2.0 device support. It operates at up to 80 MHz and supports industrial temperature range (–40°C to +85°C) in a 64-pin LQFP package, used in motor control, sensor hubs, and embedded HMI systems.

For engineers reviewing the TM4C123FH6PMI datasheet, TM4C123FH6PMI pinout, TM4C123FH6PMI application, or TM4C123FH6PMI equivalent, key selection criteria include its integrated USB PHY, deterministic FPU performance, on-chip ROM bootloader, 12-channel μDMA controller, and configurable GPIO interrupt triggering for real-time edge detection.

Technical Context

The TM4C123FH6PMI integrates a single-core ARM Cortex-M4F processor with hardware floating-point unit and memory protection unit (MPU), supporting Thumb-2 instruction set and vector table relocation. It features a 32-bit bus matrix with separate AHB/APB bridges enabling concurrent peripheral access without CPU stalling.

System-level integration includes a programmable clock tree with PLL, multiple low-power sleep modes (Sleep, Deep-Sleep, Hibernate), and dedicated system control peripherals such as reset, NMI, and watchdog timers. All analog and digital peripherals are synchronized to the same clock domain and share common interrupt vectors via NVIC with 8-bit priority grouping.

Key Specifications

Pinout & Package

TM4C123FH6PMI is housed in a 64-pin LQFP package with exposed thermal pad (EP). Pin assignments follow TI's standard Tiva C Series layout, supporting full GPIO remapping via the GPIO AFSEL register and configurable drive strength (2 mA / 4 mA / 8 mA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and MSP432P401RIPZT, the TM4C123FH6PMI offers balanced performance, integrated USB PHY, robust industrial temperature rating, and proven TivaWare software stack - making it optimal for cost-sensitive, USB-connected industrial controllers requiring deterministic real-time response.

Availability

TM4C123FH6PMI is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, and embedded HMI applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for TM4C123FH6PMI 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 connectivity solutions for industrial, automotive, and consumer markets since 1930.

The TM4C123FH6PMI belongs to TI's Tiva C Series, designed specifically for cost-effective, real-time embedded control applications requiring USB connectivity, analog integration, and industrial-grade reliability - targeting motor drives, sensor nodes, and human-machine interfaces.

FAQ

What is the maximum operating frequency of the TM4C123FH6PMI?

The TM4C123FH6PMI operates at a maximum system clock frequency of 80 MHz, achieved using the internal PLL with either the main oscillator (MOSC) or precision internal oscillator (PIOSC) as the reference source. This frequency is fully supported across the entire industrial temperature range (–40°C to +85°C) and is validated in TI's production test flow. The TM4C123FH6PMI maintains timing compliance at this speed under worst-case voltage and temperature conditions.

Does the TM4C123FH6PMI include an integrated USB physical layer (PHY)?

Yes, the TM4C123FH6PMI includes a full-speed USB 2.0 device-mode physical layer with integrated transceiver, VBUS sensing, and ID pin detection. This eliminates the need for external USB PHY components or level-shifting circuitry. The USB interface supports CDC, HID, and MSC classes out-of-the-box using TI's TivaWare USB library, and is accessible via dedicated USB0DP and USB0DM pins on the 64-pin LQFP package.

What analog peripherals are integrated into the TM4C123FH6PMI?

The TM4C123FH6PMI integrates a 12-bit, 1-MSPS analog-to-digital converter with 12 input channels, hardware sample averaging (up to 64x), and four independent sample sequencers. It also includes an internal temperature sensor, digital comparators, and programmable analog input ranges. No external ADC or signal conditioning ICs are required for basic sensor interfacing, reducing BOM count and board area in designs like environmental monitors and motor current sensing.

How much on-chip memory does the TM4C123FH6PMI provide?

The TM4C123FH6PMI provides 256 KB of on-chip flash memory with error-correcting code (ECC), 32 KB of SRAM, and 2 KB of EEPROM. The flash supports in-application programming (IAP) and sector erase operations, while the EEPROM offers byte-level write endurance and retention exceeding 20 years. These memory resources are sufficient to host TivaWare drivers, application firmware, and persistent configuration data without external storage.

Is the TM4C123FH6PMI pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C123FH6PMI is not universally pin-compatible with other Tiva C Series devices. While it shares the same 64-pin LQFP footprint with variants like TM4C123GH6PM, differences in peripheral mapping, GPIO alternate function assignments, and power pin placement require board-level validation. For example, USB0ID and USB0VBUS pins are located differently across family members, and certain analog inputs are reassigned - always consult the specific device datasheet before substitution.