Texas Instruments TM4C123GH6PMI

Overview

TM4C123GH6PMI from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 256 KB flash, 32 KB SRAM, integrated USB 2.0 OTG, dual CAN 2.0A/B controllers, and 12-bit ADC with 12 channels - deployed in industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the TM4C123GH6PMI datasheet, TM4C123GH6PMI pinout, TM4C123GH6PMI application, or TM4C123GH6PMI equivalent, key selection criteria include its 128-pin LQFP package, hardware floating-point unit (FPU), hibernation module with RTC and battery-backed memory, and support for deterministic real-time control via PWM, QEI, and μDMA.

Technical Context

The TM4C123GH6PMI integrates a 32-bit ARM Cortex-M4F core with single-precision FPU, enabling efficient signal processing and closed-loop control. It features a 12-channel 12-bit ADC with hardware averaging, four 32-bit general-purpose timers with PWM and quadrature encoder interface (QEI) capability, and dedicated hibernation logic with VBAT backup path.

System-level integration includes USB 2.0 OTG with PHY, two CAN 2.0B controllers with message RAM, eight UARTs (one with IrDA/ISO7816), six I²C modules, and four SPI interfaces - all managed by a configurable μDMA controller supporting 32 channel assignments and scatter-gather transfers.

Key Specifications

Pinout & Package

TM4C123GH6PMI is housed in a 128-pin LQFP package with exposed thermal pad (Pb-free, RoHS-compliant). Pin functions are defined per TI SPMS376E datasheet Rev E, with dedicated power domains (VDDA/VSSA for analog, VDDC/VSSC for core, VDDUSB/VSSUSB for USB PHY).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and RA4M3G10CBH#AC0, the TM4C123GH6PMI uniquely combines dual CAN, integrated USB PHY, hibernation with RTC, and industrial temperature range in a single 128-pin LQFP package - making it optimal for space-constrained, multi-protocol, battery-aware embedded systems.

Availability

TM4C123GH6PMI is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and USB-capable gateways requiring stable component supply across long-lifecycle production programs.

Supply support for TM4C123GH6PMI 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 consumer markets since 1930.

The TM4C123GH6PMI belongs to TI's Tiva C Series - designed specifically for cost-sensitive, real-time embedded applications requiring rich analog integration, deterministic timing, and low-power operation without sacrificing performance.

FAQ

What is the maximum operating frequency of the TM4C123GH6PMI?

The TM4C123GH6PMI operates at a maximum system clock frequency of 80 MHz, derived from an internal PLL that accepts input from the main oscillator (4–25 MHz), precision internal oscillator (PIOSC), or external clock source. This frequency is sustained across the full industrial temperature range (–40°C to +85°C) and supports deterministic interrupt latency critical for real-time control loops.

Does the TM4C123GH6PMI include an integrated USB physical layer (PHY)?

Yes, the TM4C123GH6PMI integrates a full-speed (12 Mbps) USB 2.0 OTG physical layer, eliminating the need for an external USB transceiver. The USB module supports device, host, and OTG roles, and includes dedicated VBUS sensing, pull-up/pull-down control, and endpoint FIFOs - enabling robust USB CDC, HID, and mass storage implementations directly from the TM4C123GH6PMI.

How many CAN interfaces does the TM4C123GH6PMI support, and what protocol versions are implemented?

The TM4C123GH6PMI supports two independent CAN 2.0B controllers compliant with ISO 11898-1, each with 32-message RAM buffers and hardware acceptance filtering. Both controllers support standard (11-bit) and extended (29-bit) identifiers, loopback mode for self-test, and programmable bit timing - enabling concurrent J1939 and CANopen communication in automotive and industrial networks.

What low-power modes are available on the TM4C123GH6PMI, and what is the lowest achievable current draw?

The TM4C123GH6PMI offers five low-power modes: sleep, deep-sleep, hibernate, shutdown, and bypass. In hibernate mode with RTC active and VBAT supplied, current draw drops to 1.7 μA typical - retaining SRAM contents, RTC time, and wake-up capability via GPIO, RTC match, or external interrupt. This makes the TM4C123GH6PMI suitable for decade-long battery operation in remote telemetry applications.

Is the TM4C123GH6PMI pin-compatible with other devices in the Tiva C Series?

No, the TM4C123GH6PMI is not pin-compatible with other Tiva C Series microcontrollers such as the TM4C1294NCPDT or TM4C1233H6PZ due to differences in pin count (128 vs. 144 or 64), peripheral mapping, and power domain assignments. While software abstraction layers (e.g., TivaWare Peripheral Driver Library) provide portability, PCB layout must be specific to the TM4C123GH6PMI's 128-pin LQFP footprint and signal routing requirements.