Texas Instruments TM4C1231H6PGEIR

Overview

TM4C1231H6PGEIR from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 256 KB Flash, 32 KB SRAM, and integrated USB 2.0 OTG, PWM, ADC (12-bit, 1MSPS), and multiple serial interfaces (UART, SPI, I²C). It serves as a main system controller in industrial HMI, motor control edge nodes, and low-power IoT gateways.

For engineers reviewing the TM4C1231H6PGEIR datasheet, TM4C1231H6PGEIR pinout, TM4C1231H6PGEIR application, or TM4C1231H6PGEIR equivalent, key selection criteria include its 80 MHz Cortex-M4F core with FPU, 12-bit 1MSPS ADC with hardware averaging, USB OTG support, hibernation module with RTC and battery-backed memory, and QFP-144 package with 114 GPIOs.

Technical Context

The TM4C1231H6PGEIR integrates a 32-bit ARM Cortex-M4F core with single-precision floating-point unit and 80 MHz maximum clock speed. It features a dedicated hibernation module with real-time clock, battery-backed SRAM, and wake-on-RTC/external-pin capability - enabling sub-1 µA hibernate current.

Peripherals include eight 16/32-bit general-purpose timers (with PWM and capture), two 12-bit ADCs (each with eight sample sequencers and hardware averaging), four UARTs (one with ISO 7816 and SIR), four SPIs, and two I²Cs. All are accessible via APB/AHB bus matrix with configurable priority and DMA support.

Key Specifications

Pinout & Package

TM4C1231H6PGEIR is housed in a 144-pin LQFP (PGE) package with exposed thermal pad. Pin functions are fully defined in TI's SPMS338E datasheet Section 1.4 and Table 1-1 (Pin Assignments).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PGE and STM32F407VGT6, the TM4C1231H6PGEIR provides optimal balance of USB integration, hibernation capability, and peripheral richness in a production-ready QFP package - making it ideal for cost-sensitive, battery-aware industrial edge applications where full 512 KB Flash is unnecessary.

Availability

TM4C1231H6PGEIR is available at Aetrix Electronics and suitable for industrial HMI, motor control edge nodes, and smart energy gateways requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.

Supply support for TM4C1231H6PGEIR 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, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The TM4C1231H6PGEIR belongs to TI's Tiva C Series - a family of ARM Cortex-M4F microcontrollers designed specifically for real-time industrial control, human-machine interface, and low-power wired/wireless connectivity applications.

FAQ

What is the maximum operating frequency of the TM4C1231H6PGEIR?

The TM4C1231H6PGEIR operates at a maximum system clock frequency of 80 MHz, derived from its internal PLL fed by either the internal precision oscillator (±1% accuracy) or an external crystal. This frequency applies to the Cortex-M4F core, bus matrix, and all on-chip peripherals - ensuring deterministic timing for real-time control loops and high-throughput data transfers.

Does the TM4C1231H6PGEIR support USB device and host modes simultaneously?

Yes, the TM4C1231H6PGEIR includes a USB 2.0 On-The-Go (OTG) controller with integrated PHY that supports both device and host roles. Its USB0VBUS and USB0ID pins enable automatic role detection, and the on-chip OTG session request protocol (SRP) and host negotiation protocol (HNP) allow dynamic switching - essential for field-service tools and portable diagnostic devices.

How much current does the TM4C1231H6PGEIR draw in hibernate mode?

In hibernate mode with RTC enabled and 2 KB of battery-backed SRAM retained, the TM4C1231H6PGEIR draws less than 1 µA from the VBAT supply (typical 800 nA at 3.0 V, –40°C to 85°C). This ultra-low quiescent current is achieved via complete isolation of the digital domain and selective retention of only the hibernation module and RTC oscillator.

Can the TM4C1231H6PGEIR execute code directly from its internal Flash memory?

Yes, the TM4C1231H6PGEIR executes code directly from its 256 KB on-chip Flash memory using zero-wait-state access at 80 MHz. The Flash controller includes prefetch buffer and branch prediction to sustain peak CPU throughput. Code can also be loaded to SRAM for latency-critical routines, but Flash remains the primary and most reliable execution medium.

What debug interfaces are supported by the TM4C1231H6PGEIR?

The TM4C1231H6PGEIR supports JTAG and ARM Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nTRST, SWDIO, SWCLK). Both protocols provide full read/write memory access, breakpoint setting, and real-time variable inspection. SWD is preferred for production programming due to its 2-pin footprint and higher reliability in noise-prone environments.