Texas Instruments TM4C123GH6PMIR

Overview

TM4C123GH6PMIR 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, 2× CAN, 8× UARTs, 2× I²C, 2× SPI, and a 12-bit 1-MSPS ADC. It operates at up to 80 MHz and supports -40°C to +85°C industrial temperature range. It serves as the main control unit in motor drive firmware, industrial PLCs, and USB-connected embedded gateways.

For engineers reviewing the TM4C123GH6PMIR datasheet, TM4C123GH6PMIR pinout, TM4C123GH6PMIR application, or TM4C123GH6PMIR equivalent, key selection criteria include its integrated USB PHY, dual CAN controllers with FIFO support, hibernation module with RTC and battery-backed memory, and deterministic real-time interrupt latency under 12 clock cycles.

Technical Context

The TM4C123GH6PMIR implements a full-featured ARM Cortex-M4F core with hardware floating-point unit (FPU), 3-stage pipeline, and NVIC supporting 64 interrupt lines with configurable priority grouping. Its system-level integration includes a programmable clock tree with PLL, multiple low-power modes (sleep, deep-sleep, hibernate), and a dedicated hibernation module with external wake-up capability and 256-byte battery-backed RAM.

Peripherals are tightly coupled via the μDMA controller with 32-channel arbitration, enabling zero-CPU-overhead transfers between ADC, UART, and SRAM. The analog subsystem features four independent 12-bit ADC sample sequencers with hardware averaging and digital comparators, while the motion control suite includes two quadrature encoder interfaces and eight PWM generator blocks with fault protection inputs.

Key Specifications

Pinout & Package

TM4C123GH6PMIR is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across five GPIO ports (A–E), plus dedicated peripheral pins for USB, CAN, UART, I²C, SPI, ADC, PWM, QEI, and debug interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GE6PM and STM32F407VGT6, the TM4C123GH6PMIR uniquely combines USB 2.0 OTG with integrated PHY, industrial-grade hibernation with RTC and battery-backed RAM, and dual CAN in a compact 64-pin LQFP - making it optimal for space-constrained, USB-connected, low-power industrial endpoints.

Availability

TM4C123GH6PMIR is available at Aetrix Electronics and suitable for industrial motor drives, USB field gateways, and smart building sensor nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TM4C123GH6PMIR 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 wireless technologies for industrial, automotive, and consumer markets.

The TM4C123 family targets cost-sensitive, real-time industrial control applications - emphasizing integrated connectivity (USB, CAN), low-power operation, and robust peripheral sets for deterministic embedded firmware execution.

FAQ

What is the maximum operating frequency of the TM4C123GH6PMIR?

The TM4C123GH6PMIR operates at a maximum system clock frequency of 80 MHz, achieved using its internal PLL with an external crystal (4–25 MHz) or precision internal oscillator. This frequency applies to the Cortex-M4F core, bus matrix, and all synchronous peripherals. The device maintains full specification compliance-including ADC sampling rate, UART baud accuracy, and PWM resolution-at this speed across the full -40°C to +85°C temperature range.

Does the TM4C123GH6PMIR include an integrated USB physical layer (PHY)?

Yes, the TM4C123GH6PMIR integrates a full-speed USB 2.0 OTG physical layer, including differential transceivers, voltage regulators, and pull-up/pull-down resistors. This eliminates the need for an external USB PHY chip and simplifies board layout. The USB module supports device, host, and OTG roles and is accessible via dedicated pins (USB0VBUS, USB0ID, USB0DM, USB0DP) on the 64-pin LQFP package.

How does the hibernation mode function in the TM4C123GH6PMIR?

The TM4C123GH6PMIR's hibernation module reduces current consumption to under 5 µA while maintaining RTC operation and preserving 256 bytes of battery-backed RAM. It supports wake-up via RTC alarm, external GPIO interrupt, or HIB pin assertion. The module includes dedicated clock sources (hibernate RTC oscillator), battery switchover circuitry, and tamper detection - enabling reliable operation in battery-backed industrial logging and remote sensor applications.

What are the key differences between TM4C123GH6PMIR and TM4C123GH6PZ?

The TM4C123GH6PMIR and TM4C123GH6PZ share identical silicon functionality and electrical specifications but differ only in packaging and marking: TM4C123GH6PMIR uses a 64-pin LQFP with moisture sensitivity level (MSL) 3 and tape-and-reel packaging for automated assembly, while TM4C123GH6PZ uses a 100-pin TQFP. Both operate from -40°C to +85°C and support the same peripheral set, clocking, and firmware binaries.

Can the TM4C123GH6PMIR support simultaneous dual CAN communication?

Yes, the TM4C123GH6PMIR integrates two independent CAN 2.0A/B controllers (CAN0 and CAN1), each with 32 message objects, dedicated transmit/receive FIFOs, and programmable bit timing. They operate concurrently without resource contention, enabling applications such as redundant fieldbus links or hybrid networks where one CAN port handles motor control and the other manages diagnostics or sensor aggregation.