Texas Instruments TM4C1237E6PMI7

Overview

TM4C1237E6PMI7 from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, integrated USB 2.0 device/host/OTG controller, 12-bit ADC (up to 1MSPS), and 8 PWM outputs. It operates at up to 80 MHz and supports -40°C to +85°C industrial temperature range in a 100-pin LQFP package. It is used in motor control, industrial automation, and USB-connected embedded systems.

For engineers reviewing the TM4C1237E6PMI7 datasheet, TM4C1237E6PMI7 pinout, TM4C1237E6PMI7 application, or TM4C1237E6PMI7 equivalent, key selection criteria include its integrated USB PHY, hibernation module with RTC and battery-backed memory, deterministic real-time performance via NVIC and SysTick, and support for TivaWare™ software stack in industrial-grade packaging.

Technical Context

The TM4C1237E6PMI7 integrates a single-core ARM Cortex-M4F CPU with hardware floating-point unit (FPU), enabling high-precision math operations for sensor fusion and motor control algorithms. Its system-level architecture includes a 32-bit AHB bus matrix, configurable memory protection unit (MPU), and power management supporting sleep, deep-sleep, and hibernate modes with wake-up on GPIO, UART, or RTC match.

Peripherals are tightly coupled via APB buses with dedicated clock gating and reset control. The microcontroller features four general-purpose timers (GPTMs) with PWM, capture, and quadrature encoder support; two UARTs with IrDA and ISO 7816; one I²C; two SPI; and a 12-channel μDMA controller-enabling zero-CPU-overhead data movement between peripherals and memory.

Key Specifications

Pinout & Package

TM4C1237E6PMI7 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS358E datasheet Rev E (June 2014), including dedicated JTAG/SWD debug pins, USB D+/D−, VDD/VSS rails, and multiplexed GPIO with peripheral alternate functions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1237E6PMI7, TM4C123GH6PM trades USB OTG for CAN while maintaining pin compatibility, whereas STM32F407VGT6 offers higher clock speed and memory but requires external USB components and lacks integrated hibernate retention - making TM4C1237E6PMI7 optimal for USB-centric, low-power industrial endpoints.

Availability

TM4C1237E6PMI7 is available at Aetrix Electronics and suitable for industrial motor control, USB-connected data loggers, and programmable logic controller (PLC) I/O modules requiring stable component supply across multi-year production cycles.

Supply support for TM4C1237E6PMI7 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 applications.

The TM4C1237E6PMI7 belongs to TI's Tiva C Series microcontroller family, designed specifically for cost-sensitive, real-time industrial control applications requiring integrated connectivity (USB), analog sensing, and ultra-low-power hibernation capabilities.

FAQ

What is the maximum operating frequency of the TM4C1237E6PMI7?

The TM4C1237E6PMI7 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 validated across the full industrial temperature range (-40°C to +85°C) and supports deterministic real-time execution of control loops and USB transactions without throttling.

Does the TM4C1237E6PMI7 include an integrated USB physical layer (PHY)?

Yes, the TM4C1237E6PMI7 includes a fully integrated USB 2.0 full-speed PHY compliant with USB specification revision 2.0. It supports device, host, and OTG modes without requiring external transceivers. The USB0DP and USB0DM pins are routed directly to the internal PHY, enabling plug-and-play USB connectivity with only standard series termination resistors needed on the PCB.

What low-power modes does the TM4C1237E6PMI7 support, and what is its lowest hibernate current?

The TM4C1237E6PMI7 supports Sleep, Deep-Sleep, and Hibernate modes. In Hibernate mode with RTC running and 2 KB SRAM retained, typical current consumption is 1.1 µA at 3.3 V and 25°C, and remains below 5 µA across the full -40°C to +85°C range. Wake-up sources include GPIO, UART, and RTC match events - making it ideal for battery-powered remote sensors.

How much on-chip memory does the TM4C1237E6PMI7 provide, and what types are included?

The TM4C1237E6PMI7 provides 256 KB of on-chip flash memory for program storage, 32 KB of SRAM for runtime variables and stack, 8 KB of ROM containing TivaWare™ driver and USB stack routines, and 2 KB of battery-backed SRAM accessible in Hibernate mode. Flash supports in-application programming (IAP) and has error correction coding (ECC) for enhanced reliability in industrial environments.

Is the TM4C1237E6PMI7 pin-compatible with other Tiva C Series microcontrollers?

The TM4C1237E6PMI7 shares the same 100-pin LQFP package and core peripheral mapping with other TM4C123x devices such as TM4C123GH6PM, but pin compatibility is not guaranteed across all variants due to differences in peripheral enablement (e.g., USB vs. CAN). Always verify pin function tables in the respective datasheets; for example, USB0DP/USB0DM on TM4C1237E6PMI7 map to CAN0RX/CAN0TX on TM4C123GH6PM.