Texas Instruments TM4C1237H6PMI7

Overview

TM4C1237H6PMI7 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 (1MSPS), 8-channel PWM, and USB 2.0 device interface. 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 a main system controller in motor control, industrial sensing, and USB-connected embedded devices.

For engineers reviewing the TM4C1237H6PMI7 datasheet, TM4C1237H6PMI7 pinout, TM4C1237H6PMI7 application, or TM4C1237H6PMI7 equivalent, key selection considerations include its integrated USB PHY, hibernation module with RTC and battery-backed memory, dual 32-bit general-purpose timers, 40 GPIOs with interrupt capability, and support for TivaWare™ software stack and TI's Code Composer Studio™ IDE.

Technical Context

The TM4C1237H6PMI7 implements the ARMv7E-M architecture with hardware floating-point unit (FPU) compliant with IEEE 754 single-precision standard, enabling deterministic real-time math operations. Its memory subsystem includes 256 KB on-chip flash with error correction, 32 KB SRAM, and 2 KB EEPROM, all accessible via bus matrix with zero-wait-state operation at 80 MHz.

System-level integration includes a programmable clock tree with PLL, multiple low-power modes (sleep, deep-sleep, hibernate), and dedicated hibernation module featuring RTC, battery-backed RAM, and external wake-up pins. Peripheral interconnect uses APB/AHB buses with configurable priority arbitration for μDMA channels supporting 32 peripheral requests.

Key Specifications

Pinout & Package

TM4C1237H6PMI7 is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS361E datasheet Rev E (June 2014), with dedicated power/ground pairs, configurable GPIOs, and fixed-function pins for USB, JTAG/SWD, and analog inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM, TM4C1237H6PMI7 adds integrated USB PHY and retains identical hibernate capabilities; versus STM32F407VGT6, it trades raw performance for superior low-power autonomy and TI's mature TivaWare ecosystem - making it optimal for USB-peripheral and battery-constrained industrial nodes.

Availability

TM4C1237H6PMI7 is available at Aetrix Electronics and suitable for industrial motor control, USB-connected sensor hubs, and smart building occupancy nodes requiring stable component supply and long-term manufacturability.

Supply support for TM4C1237H6PMI7 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 TM4C1237H6PMI7 belongs to TI's Tiva C Series microcontroller family, designed specifically for cost-sensitive, real-time embedded applications requiring integrated analog, USB, and ultra-low-power hibernation capabilities - targeting industrial automation, building controls, and portable instrumentation.

FAQ

What is the maximum operating frequency of the TM4C1237H6PMI7?

The TM4C1237H6PMI7 operates at a maximum system clock frequency of 80 MHz, achieved using its internal PLL with external crystal or precision internal oscillator. This frequency applies to the ARM Cortex-M4F core, bus matrix, and most peripherals, and is validated across the full industrial temperature range (-40°C to +85°C). The TM4C1237H6PMI7 maintains timing compliance without derating under specified voltage and thermal conditions.

Does the TM4C1237H6PMI7 include an integrated USB physical layer?

Yes, the TM4C1237H6PMI7 integrates a full-speed USB 2.0 physical layer (PHY) compliant with USB specification revision 2.0. It supports USB device mode only, with dedicated USB0DP and USB0DM pins, internal termination resistors, and 3.3-V tolerant I/O. No external transceiver is required for basic USB device functionality, reducing bill-of-materials and PCB layout complexity in designs using the TM4C1237H6PMI7.

What low-power modes does the TM4C1237H6PMI7 support?

The TM4C1237H6PMI7 supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws as low as 1.7 µA with RTC active and battery-backed RAM retained, enabled by its dedicated hibernation module. Wake-up sources include RTC alarm, external GPIO pins, and HIB interrupt. Sleep and Deep-Sleep offer progressively deeper power savings while retaining more peripheral context - all managed via the system control block in the TM4C1237H6PMI7.

How much on-chip memory does the TM4C1237H6PMI7 provide?

The TM4C1237H6PMI7 includes 256 KB of on-chip flash memory with error-correcting code (ECC), 32 KB of SRAM with parity checking, and 2 KB of EEPROM. Flash is organized in 1-KB sectors for flexible firmware updates; SRAM supports zero-wait-state access at 80 MHz; EEPROM provides byte-erasable nonvolatile storage for calibration data or configuration parameters - all directly accessible by the TM4C1237H6PMI7's Cortex-M4F core without external memory controllers.

Is the TM4C1237H6PMI7 pin-compatible with other Tiva C Series MCUs?

The TM4C1237H6PMI7 is pin-compatible with the TM4C123GH6PM and TM4C123BH6PGE in the same 64-pin LQFP package, sharing identical pinout, power, and reset configurations. However, functional differences exist - notably, the TM4C1237H6PMI7 includes an integrated USB PHY while TM4C123GH6PM does not. Designers must verify peripheral mapping and enable appropriate clocking and initialization sequences for the TM4C1237H6PMI7 to ensure correct operation.