Texas Instruments TM4C1231H6PGEI

Overview

TM4C1231H6PGEI 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), two UARTs, two I²C, four SPI, and USB 2.0 device support. It operates at up to 80 MHz, supports hibernation mode with RTC and battery-backed memory, and targets embedded control in industrial automation, motor control, and sensor gateway applications.

For engineers reviewing the TM4C1231H6PGEI datasheet, TM4C1231H6PGEI pinout, TM4C1231H6PGEI application, or TM4C1231H6PGEI equivalent, key selection criteria include its 80-MHz Cortex-M4F core with FPU, 64-pin LQFP package with 49 GPIOs, USB device capability, hibernation power management, and integrated analog front-end for real-time signal acquisition.

Technical Context

The TM4C1231H6PGEI integrates a 32-bit ARM Cortex-M4F CPU with single-precision floating-point unit and 16/32-bit Thumb-2 instruction set, enabling deterministic real-time computation. Its system-level integration includes μDMA controller (32-channel), NVIC with 80 interrupt lines, and configurable clock tree supporting multiple PLL and oscillator sources.

On-chip analog subsystem comprises dual 12-bit ADCs with eight sample sequencers, internal temperature sensor, and digital comparators-enabling closed-loop sensing without external components. The hibernation module provides ultra-low-power operation with RTC wake-up, VBAT backup, and retention of 2 KB SRAM during deep sleep.

Key Specifications

Pinout & Package

TM4C1231H6PGEI is housed in a 64-pin LQFP (PGE) package with exposed thermal pad, rated for –40°C to +105°C industrial temperature range. Pinout supports multiplexed peripheral functions across GPIO banks A–F, with dedicated JTAG/SWD debug pins and USB D+/D– differential pair.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F401RE and RP2040, the TM4C1231H6PGEI uniquely combines USB 2.0 device capability with hibernation-optimized power management, integrated dual ADCs, and industrial temperature rating-making it optimal for self-contained, battery-aware sensor and control endpoints requiring minimal external components.

Availability

TM4C1231H6PGEI is available at Aetrix Electronics and suitable for industrial motor control, smart building HVAC nodes, portable diagnostic tools, and sensor data gateways requiring stable component supply and long-term manufacturability.

Supply support for TM4C1231H6PGEI 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 TM4C1231H6PGEI, was designed specifically for cost-sensitive, real-time embedded applications requiring high analog integration, low-power operation, and USB connectivity-targeting industrial control, robotics, and IoT edge devices.

FAQ

What is the maximum operating frequency of the TM4C1231H6PGEI?

The TM4C1231H6PGEI operates at a maximum system clock frequency of 80 MHz, derived from an internal PLL that can be configured to multiply an external crystal (4–25 MHz) or internal oscillator. This frequency applies to the Cortex-M4F core, bus matrix, and most peripherals, with certain analog blocks (e.g., ADC) specifying separate timing constraints in the datasheet.

Does the TM4C1231H6PGEI support USB device functionality without external components?

Yes, the TM4C1231H6PGEI integrates a full-speed USB 2.0 device controller with on-die transceiver, requiring only passive termination resistors and a 1.5-kΩ pull-up resistor on USB0DP. No external PHY or level-shifter is needed for standard USB device operation, simplifying board design and reducing BOM cost.

How much SRAM is available for application use in the TM4C1231H6PGEI?

The TM4C1231H6PGEI provides 32 KB of general-purpose SRAM, all accessible to firmware for variables, stack, heap, and peripheral buffers. Additionally, 2 KB of hibernate RAM remains powered during hibernation mode, preserving critical state such as network credentials or calibration data without external backup components.

What analog features are integrated into the TM4C1231H6PGEI?

The TM4C1231H6PGEI integrates dual 12-bit SAR ADCs with up to 1 MSPS aggregate sampling rate, eight programmable sample sequencers, hardware averaging (2–64 samples), internal temperature sensor, and four digital comparators. These features enable direct connection of analog sensors without external signal conditioning in many industrial and environmental monitoring applications.

Is the TM4C1231H6PGEI pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C1231H6PGEI is not universally pin-compatible across the Tiva C Series. While it shares the 64-pin LQFP (PGE) package with some variants like TM4C123GH6PGE, differences in peripheral mapping, voltage domains, and reset behavior require board-level validation. Always consult the specific device's datasheet and pinmux tables before substitution.