Texas Instruments TM4C1237H6PGEIR

Overview

TM4C1237H6PGEIR from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB Flash, 32 KB SRAM, and integrated USB 2.0 OTG, CAN, PWM, ADC (12-bit, 1MSPS), and multiple serial interfaces. It operates at up to 80 MHz and supports industrial temperature range (–40°C to +105°C) in a 144-pin LQFP package. It serves as the main control unit in motor drives, industrial PLCs, and smart sensor nodes.

For engineers reviewing the TM4C1237H6PGEIR datasheet, TM4C1237H6PGEIR pinout, TM4C1237H6PGEIR application, or TM4C1237H6PGEIR equivalent, key selection criteria include its dual CAN 2.0B controllers, hibernation module with RTC and battery-backed memory, USB device/host/OTG capability, and hardware floating-point unit for real-time signal processing.

Technical Context

The TM4C1237H6PGEIR integrates an ARM Cortex-M4F core with FPU, supporting single-precision IEEE 754 arithmetic and DSP instructions. It features a 32-bit bus matrix, memory protection unit (MPU), and nested vectored interrupt controller (NVIC) with 8 priority levels per interrupt.

System-level integration includes a hibernation module with dedicated 32.768 kHz RTC oscillator, battery-backed 2 KB SRAM, and VBAT monitoring; plus a μDMA controller with 32 channels supporting peripheral-to-memory, memory-to-peripheral, and memory-to-memory transfers without CPU intervention.

Key Specifications

Pinout & Package

TM4C1237H6PGEIR is housed in a 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS360E datasheet Rev E (June 2014), with dedicated JTAG/SWD debug pins, dual CAN transceiver interfaces, USB D+/D–, and configurable GPIOs supporting peripheral multiplexing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PGE, TM4C1237H6PGEIR adds critical hibernation functionality with battery-backed memory and RTC - essential for energy harvesting or backup-power systems. Versus TM4C1294NCPDT, it trades raw performance and Ethernet for smaller footprint, lower power, and industrial temperature compliance in the same LQFP form factor.

Availability

TM4C1237H6PGEIR is available at Aetrix Electronics and suitable for industrial motor control, smart building sensor hubs, and automotive body electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TM4C1237H6PGEIR 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 wireless technologies, with decades of experience in industrial and automotive-grade microcontrollers.

The TM4C1237H6PGEIR belongs to the Tiva C Series - designed specifically for real-time control applications demanding robust peripherals, low-power hibernation, and seamless connectivity across CAN, USB, and serial protocols.

FAQ

What is the maximum operating frequency of the TM4C1237H6PGEIR?

The TM4C1237H6PGEIR operates at a maximum system clock frequency of 80 MHz, achieved using its internal PLL with input from the main oscillator or precision internal 16 MHz RC oscillator. This speed delivers 100 DMIPS performance and supports real-time execution of control algorithms, communication stacks, and sensor processing within the TM4C1237H6PGEIR's architecture.

Does the TM4C1237H6PGEIR support USB device, host, and OTG modes?

Yes, the TM4C1237H6PGEIR integrates a full-speed USB 2.0 controller with on-chip PHY supporting device, host, and OTG operation. Its USB module complies with USB 2.0 specification and includes dedicated endpoints, FIFOs, and DMA integration - enabling direct connection to PCs, USB peripherals, or dual-role accessories without external transceivers in the TM4C1237H6PGEIR design.

How does the hibernation module in the TM4C1237H6PGEIR function during power loss?

The TM4C1237H6PGEIR hibernation module retains operation using a separate VBAT supply, preserving 2 KB of battery-backed SRAM, the 32.768 kHz RTC, and wake-up configuration. During main power loss, the TM4C1237H6PGEIR enters hibernate mode drawing ~1.7 µA, maintaining timekeeping and critical state - allowing rapid resumption of operation upon VDD restoration or RTC alarm trigger.

Are there hardware floating-point capabilities in the TM4C1237H6PGEIR?

Yes, the TM4C1237H6PGEIR features a full IEEE 754-compliant single-precision hardware floating-point unit (FPU) integrated into its ARM Cortex-M4F core. This FPU accelerates trigonometric, exponential, and division operations - significantly improving execution time for motor control algorithms, sensor fusion, and digital filtering tasks implemented on the TM4C1237H6PGEIR.

What debug interfaces does the TM4C1237H6PGEIR support?

The TM4C1237H6PGEIR supports both Serial Wire Debug (SWD) and JTAG interfaces via dedicated pins (SWCLK, SWDIO, nSRST, TCK, TMS). These interfaces enable full-featured debugging, flash programming, and real-time tracing using standard ARM tools such as TI Code Composer Studio or SEGGER J-Link - all directly supported by the TM4C1237H6PGEIR's debug architecture.