Texas Instruments TM4C123BH6PMI7

Overview

TM4C123BH6PMI7 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× CAN controllers, 2× QEI modules, and a 12-bit 1-MSPS ADC. It operates at up to 80 MHz and supports -40°C to +85°C industrial temperature range in a 64-pin LQFP package. It serves as the main control unit in motor drive firmware, industrial PLCs, and USB-connected sensor hubs.

For engineers reviewing the TM4C123BH6PMI7 datasheet, TM4C123BH6PMI7 pinout, TM4C123BH6PMI7 application, or TM4C123BH6PMI7 equivalent, key selection considerations include its integrated USB PHY, dual CAN 2.0B support, hibernation module with RTC and battery-backed memory, and deterministic real-time interrupt latency under 12 clock cycles.

Technical Context

The TM4C123BH6PMI7 implements a full-featured ARM Cortex-M4F core with hardware floating-point unit (FPU), NVIC supporting 64 interrupt lines with configurable priority grouping, and a memory protection unit (MPU) for secure task isolation. Its system-level integration includes a hibernation module with dedicated VBAT supply path, internal voltage regulator, and power gating for selective peripheral shutdown.

Peripherals are tightly coupled via the μDMA controller with 32-channel arbitration, enabling zero-CPU-overhead transfers between ADC, UART, SPI, and GPIO. Clock management uses a programmable PLL with multiple input sources (PIOSC, MOSC, HSE), allowing dynamic frequency scaling across sleep modes while maintaining USB frame timing accuracy.

Key Specifications

Pinout & Package

TM4C123BH6PMI7 is housed in a 64-pin LQFP package with 0.5 mm pitch and exposed thermal pad. Pin functions are defined per TI SPMS368E datasheet Rev E (June 2014), with dedicated JTAG/SWD debug pins, USB D+/D− differential pair, CANH/CANL transceiver interfaces, and multiplexed GPIO supporting peripheral alternate functions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and MSP432P401RIPZT, TM4C123BH6PMI7 uniquely balances industrial-grade real-time performance, dual CAN, integrated USB PHY, and hibernation-ready power architecture in a compact 64-pin package-making it optimal for space-constrained embedded control with mixed connectivity requirements.

Availability

TM4C123BH6PMI7 is available at Aetrix Electronics and suitable for industrial motor drives, USB-connected instrumentation, and automotive body electronics requiring stable component supply and long-term lifecycle support.

Supply support for TM4C123BH6PMI7 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, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.

The Tiva C Series-of which TM4C123BH6PMI7 is a flagship member-was designed specifically for cost-sensitive, real-time embedded control applications demanding high peripheral integration, deterministic timing, and robust industrial temperature operation.

FAQ

What is the maximum operating frequency of the TM4C123BH6PMI7?

The TM4C123BH6PMI7 operates at a maximum system clock frequency of 80 MHz, achieved via its on-chip PLL configured from either the internal precision oscillator (PIOSC) or external crystal (MOSC). This frequency is sustained across the full -40°C to +85°C temperature range and supports deterministic real-time execution with interrupt latency as low as 12 clock cycles. The TM4C123BH6PMI7's clock tree includes multiple dividers and gating controls to optimize power versus performance per peripheral.

Does the TM4C123BH6PMI7 include an integrated USB physical layer (PHY)?

Yes, the TM4C123BH6PMI7 integrates a full-speed USB 2.0 OTG physical layer compliant with USB specification revision 2.0. This allows direct connection to USB cables without external transceivers and supports device, host, and OTG modes. The TM4C123BH6PMI7's USB module includes endpoint buffers, DMA linkage, and descriptors handled in firmware-enabling implementations such as CDC virtual COM ports, HID devices, or mass storage class peripherals using only the TM4C123BH6PMI7 and minimal passive components.

How many CAN controllers does the TM4C123BH6PMI7 support, and what protocol versions are implemented?

The TM4C123BH6PMI7 integrates two independent CAN controllers compliant with the CAN 2.0B protocol specification, supporting both standard (11-bit) and extended (29-bit) identifier formats. Each controller features dedicated message objects (32 total), programmable bit timing, automatic retransmission, and error confinement. These CAN modules operate independently and can be assigned to separate physical buses-making the TM4C123BH6PMI7 suitable for automotive gateway or industrial fieldbus bridging applications requiring concurrent multi-network communication.

What power-saving modes are available on the TM4C123BH6PMI7, and how low is the hibernate current?

The TM4C123BH6PMI7 supports five power modes: run, sleep, deep-sleep, hibernate, and shutdown. In hibernate mode-with VBAT supplied and RTC enabled-the device draws as low as 1.7 µA while retaining 2 KB of RAM, the RTC counter, and wake-up capability via external pin or RTC alarm. This mode is managed by the dedicated hibernation module, which isolates the main power domain and uses a separate low-leakage oscillator. The TM4C123BH6PMI7's hibernate current is specified across temperature and process corners per TI SPMS368E datasheet Section 1.3.8.

Is there a factory-programmed bootloader in the TM4C123BH6PMI7, and what interfaces does it support?

Yes, the TM4C123BH6PMI7 includes a ROM-resident bootloader programmed at manufacture and permanently immutable. It supports firmware updates over UART (with XMODEM), USB (DFU class), and I²C (using TI's custom protocol). The bootloader activates on reset when the BOOT pin is asserted or when a specific GPIO pattern is detected, enabling field upgrades without JTAG hardware. This feature is documented in the TM4C123BH6PMI7 datasheet Section 8.2.2 and referenced in the TivaWare Peripheral Driver Library user guide.