Texas Instruments TM4C1237E6PMI7R

Overview

TM4C1237E6PMI7R 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 with 12 channels, two 32-bit general-purpose timers, and USB 2.0 OTG controller. It operates at up to 80 MHz and supports -40°C to +105°C industrial temperature range in a 64-pin LQFP package, used in motor control, industrial sensing, and embedded HMI systems.

For engineers reviewing the TM4C1237E6PMI7R datasheet, TM4C1237E6PMI7R pinout, TM4C1237E6PMI7R application, or TM4C1237E6PMI7R equivalent, key selection criteria include its integrated USB OTG interface, hibernation module with RTC and battery-backed memory, dual 32-bit GPTM blocks, 12-bit ADC sampling rate of 1 MSPS, and support for ARM Thumb-2 and DSP instructions.

Technical Context

The TM4C1237E6PMI7R implements a full-featured Cortex-M4F core with hardware floating-point unit (FPU), enabling deterministic real-time signal processing. Its system integration includes a hibernation module with dedicated VBAT supply path, configurable GPIOs with slew-rate control, and μDMA controller supporting 32-channel arbitration and peripheral-to-memory transfers without CPU intervention.

Peripherals are tightly coupled via the AHB/APB bus matrix: the 12-bit ADC supports hardware averaging and digital comparators; UARTs include ISO 7816 smart card and SIR infrared modes; and the USB controller supports OTG host/device/OTG roles with internal PHY and 1.5 kΩ pull-up resistor.

Key Specifications

Pinout & Package

TM4C1237E6PMI7R is housed in a 64-pin LQFP package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin assignments follow TI's standard Tiva C Series pinout for 64-pin variants, supporting full peripheral mapping including USB D+/D−, multiple UART/SSI/I2C interfaces, and GPIOs with programmable drive strength and slew rate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM, TM4C1237E6PMI7R offers identical functionality with documented production status per TI SPMS358E; versus STM32F407VGT6, it reduces system-level component count by integrating USB PHY and hibernate power management - lowering total cost and layout complexity for industrial edge devices.

Availability

TM4C1237E6PMI7R is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, embedded HMI panels, and USB peripheral devices requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TM4C1237E6PMI7R 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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The Tiva C Series - including TM4C1237E6PMI7R - was designed specifically for cost-sensitive, real-time embedded applications requiring high analog integration, low-power hibernation, and USB connectivity without external components.

FAQ

What is the maximum operating frequency of the TM4C1237E6PMI7R?

The TM4C1237E6PMI7R operates at a maximum system clock frequency of 80 MHz, derived from its internal precision oscillator or external crystal source. This speed is fully supported across the entire industrial temperature range (-40°C to +105°C) and enables real-time execution of control algorithms, communication stacks, and sensor processing without throttling. The TM4C1237E6PMI7R achieves this performance using the ARM Cortex-M4F core with hardware floating-point unit and optimized memory subsystem.

Does the TM4C1237E6PMI7R include an integrated USB physical layer?

Yes, the TM4C1237E6PMI7R integrates a full-speed USB 2.0 OTG physical layer (PHY) with on-chip termination resistors, including a 1.5 kΩ pull-up resistor on D+ for device enumeration. This eliminates the need for external USB transceivers in most USB device or OTG applications. The TM4C1237E6PMI7R supports USB device, host, and OTG roles, and its USB controller is accessible via dedicated pins (USB0DP/USB0DM) in the 64-pin LQFP package.

What low-power modes does the TM4C1237E6PMI7R support?

The TM4C1237E6PMI7R supports multiple low-power states including Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws less than 1.5 µA while retaining RTC operation and 2 KB of battery-backed RAM via the VBAT pin. Wake-up sources include RTC alarm, external GPIO, or USB activity. These modes are managed by the integrated hibernation module, and the TM4C1237E6PMI7R maintains full register context and peripheral configuration across transitions without external supervision.

Can the TM4C1237E6PMI7R execute floating-point arithmetic in hardware?

Yes, the TM4C1237E6PMI7R contains a full IEEE 754-compliant single-precision floating-point unit (FPU) integrated into its ARM Cortex-M4F core. This enables hardware acceleration of addition, multiplication, division, square root, and transcendental functions - reducing execution time for mathematical operations by up to 10× compared to software emulation. Applications such as motor control, sensor fusion, and digital filtering benefit directly from the FPU in the TM4C1237E6PMI7R.

Is the TM4C1237E6PMI7R pin-compatible with other Tiva C Series microcontrollers?

The TM4C1237E6PMI7R uses the standard 64-pin LQFP package shared across multiple Tiva C Series parts, including TM4C123GH6PM and TM4C123BE6PM. While pin functions are largely consistent within the same package variant, exact signal mapping must be verified against the specific device's datasheet - for example, USB, hibernate, and analog input pin assignments are identical between TM4C1237E6PMI7R and TM4C123GH6PM, enabling drop-in replacement in many designs.