Texas Instruments TM4C1237H6PMI

Overview

TM4C1237H6PM 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 (up to 1MSPS), PWM, UART, I²C, SPI, USB 2.0, and hibernation module - deployed in industrial motor control, sensor hubs, and smart metering systems.

For engineers reviewing the TM4C1237H6PM datasheet, TM4C1237H6PM pinout, TM4C1237H6PM application, or TM4C1237H6PM equivalent, key selection criteria include its 80 MHz CPU clock, 12-bit ADC resolution with hardware averaging, USB device/host/OTG support, hibernation current of 1.7 µA, and -40°C to +85°C industrial temperature grade.

Technical Context

The TM4C1237H6PM integrates a single-core ARM Cortex-M4F processor with floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC). It supports Thumb-2 instruction set and delivers deterministic real-time performance for closed-loop control.

Its system-level integration includes a programmable hibernation module with RTC, battery-backed memory, and wake-on-external-event capability; plus μDMA with 32-channel arbitration supporting peripheral-to-memory transfers without CPU intervention.

Key Specifications

Pinout & Package

TM4C1237H6PM is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are validated per TI SPMS361E datasheet Rev E (June 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6 and MSP432P401RIPZ, the TM4C1237H6PM uniquely balances 80 MHz real-time performance, integrated USB transceiver, hibernation module with RTC, and industrial temperature rating - making it optimal for cost-sensitive, mixed-signal edge controllers requiring both connectivity and ultra-low-power standby.

Availability

TM4C1237H6PM is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, wireless sensor hubs, and building automation controllers requiring stable component supply across extended product lifecycles.

Supply support for TM4C1237H6PM 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 connectivity technologies, with decades of experience in industrial and automotive MCU design.

The TM4C1237H6PM belongs to the Tiva C Series - engineered for cost-effective, real-time control in resource-constrained industrial and IoT edge applications, emphasizing integrated analog, low-power hibernation, and USB connectivity.

FAQ

What is the maximum operating frequency of the TM4C1237H6PM?

The TM4C1237H6PM operates at a maximum CPU frequency of 80 MHz, achieved using the internal PLL with a 16 MHz crystal oscillator input. This frequency is fully supported across the entire industrial temperature range (-40°C to +85°C) and enables deterministic real-time response for time-critical control loops. The TM4C1237H6PM maintains this clock stability without external frequency multipliers or additional clock conditioning circuitry.

Does the TM4C1237H6PM include an integrated USB transceiver?

Yes, the TM4C1237H6PM integrates a full-speed USB 2.0 transceiver compliant with USB Device, Host, and OTG specifications. It supports session request protocol (SRP) and host negotiation protocol (HNP), eliminating the need for external PHY components. The TM4C1237H6PM provides dedicated USB0VBUS, USB0ID, USB0P, and USB0N pins with internal pull-ups and ESD protection rated to ±8 kV HBM.

What low-power modes does the TM4C1237H6PM support?

The TM4C1237H6PM supports multiple low-power states including Sleep, Deep-Sleep, and Hibernation. In Hibernation mode, it draws only 1.7 µA while retaining RTC operation and 2 KB of battery-backed RAM. Wake-up can be triggered by RTC alarm, external GPIO, or external interrupt - all without CPU intervention. The TM4C1237H6PM's hibernation module includes dedicated control registers and battery-switchover circuitry, enabling seamless transition between active and ultra-low-power states.

How much on-chip memory does the TM4C1237H6PM provide?

The TM4C1237H6PM includes 256 KB of on-chip flash memory for program storage and 32 KB of SRAM for runtime data and stack. It also features 8 KB of ROM containing TivaWare™ peripheral driver library and boot loader, plus 2 KB of battery-backed RAM accessible during hibernation. This memory configuration supports complex firmware with USB stacks, cryptographic libraries, and real-time control algorithms without external memory expansion. The TM4C1237H6PM's flash supports sector erase and programming in-system with error correction.

Is the TM4C1237H6PM pin-compatible with other Tiva C Series microcontrollers?

The TM4C1237H6PM uses a 64-pin LQFP package with a defined pinout documented in TI SPMS361E. While it shares the same package footprint with other TM4C123x variants (e.g., TM4C123GH6PM), pin compatibility is not guaranteed across all peripherals due to differences in peripheral mapping and alternate function assignments. Engineers must verify signal routing against the specific variant's datasheet; the TM4C1237H6PM's unique feature set - including hibernation control pins and USB routing - requires board-level validation even within the same package family.