Texas Instruments TM4C1231H6PGEI7R

Overview

TM4C1231H6PGEI7R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB Flash, 32 KB SRAM, and integrated USB 2.0 OTG, 12-bit ADC (1MSPS), and multiple PWM-capable timers. It operates at up to 80 MHz and supports -40°C to +105°C industrial temperature range in a 144-pin LQFP package. It is used in motor control, industrial automation, and smart sensor nodes requiring deterministic real-time response and on-chip connectivity.

For engineers reviewing the TM4C1231H6PGEI7R datasheet, TM4C1231H6PGEI7R pinout, TM4C1231H6PGEI7R application, or TM4C1231H6PGEI7R equivalent, key selection criteria include its integrated USB PHY, hibernation module with RTC and battery-backed memory, dual 16-bit general-purpose timers with PWM output, 12-channel μDMA controller, and support for TivaWare™ software stack and TI's Code Composer Studio™ IDE.

Technical Context

The TM4C1231H6PGEI7R implements the ARMv7E-M architecture with hardware floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC). It integrates a dedicated hibernation module with RTC, battery-backed RAM, and wake-on-external-event capability - enabling ultra-low-power operation down to 1.7 µA in hibernate mode with RTC active.

Its analog subsystem includes two independent 12-bit ADCs (each with eight sample sequencers and hardware averaging), internal temperature sensor, and digital comparators. Serial interfaces include four UARTs (one with ISO 7816 and SIR support), two I²C modules, two SPI controllers, and one USB 2.0 OTG controller with integrated PHY.

Key Specifications

Pinout & Package

TM4C1231H6PGEI7R is housed in a 144-pin LQFP package with exposed thermal pad. Pin functions are defined per TI SPMS338E datasheet Rev E (June 2014), supporting full GPIO remapping, peripheral sharing, and JTAG/SWD debug interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1231H6PGEI7R, TM4C123GH6PM trades USB/hibernation for smaller footprint, while STM32F407VGT6 offers higher performance but increases system-level complexity and power in low-duty-cycle applications.

Availability

TM4C1231H6PGEI7R is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and USB HID devices requiring stable component supply across extended product lifecycles.

Supply support for TM4C1231H6PGEI7R 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 wireless technologies since 1930.

The TM4C1231H6PGEI7R belongs to TI's Tiva™ C Series - designed specifically for cost-sensitive, real-time industrial and consumer applications requiring integrated connectivity, low-power operation, and robust peripheral sets.

FAQ

What is the maximum operating frequency of the TM4C1231H6PGEI7R?

The TM4C1231H6PGEI7R operates at a maximum system clock frequency of 80 MHz, derived from an internal PLL that can be configured using the system control registers. This frequency applies to the ARM Cortex-M4F core, bus matrix, and all on-chip peripherals unless individually gated. The TM4C1231H6PGEI7R maintains this speed across its full industrial temperature range (-40°C to +105°C) when supplied with 3.3 V ±5%.

Does the TM4C1231H6PGEI7R include an integrated USB physical layer (PHY)?

Yes, the TM4C1231H6PGEI7R integrates a full-speed USB 2.0 OTG physical layer, including differential transceivers, pull-up/pull-down resistors, and voltage regulators for VBUS sensing. This eliminates the need for an external USB transceiver in most device-mode applications and supports host, device, and OTG roles directly from the TM4C1231H6PGEI7R die.

What low-power modes does the TM4C1231H6PGEI7R support, and what is the lowest current draw?

The TM4C1231H6PGEI7R supports Sleep, Deep-Sleep, and Hibernate modes. In Hibernate mode with RTC enabled and battery-backed RAM active, it draws just 1.7 µA typical from the VBAT supply. This mode retains register state, RTC time, and 2 KB of memory while disabling all clocks except the 32.768 kHz hibernation oscillator - verified per TI SPMS338E datasheet Section 7.3.7.

How many ADC channels and sample rates does the TM4C1231H6PGEI7R support?

The TM4C1231H6PGEI7R features two independent 12-bit analog-to-digital converters, each supporting up to 16 external input channels and hardware sample averaging across up to 64 conversions. Each ADC achieves up to 1 million samples per second (1 MSPS) in sequential mode, with programmable resolution, trigger sources, and sequencer priority - detailed in Section 13 of the SPMS338E datasheet.

Is the TM4C1231H6PGEI7R pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C1231H6PGEI7R is not pin-compatible with other Tiva C Series parts such as the TM4C123GH6PM or TM4C1294NCPDT. Its 144-pin LQFP package and specific peripheral mapping (e.g., USB0 pins, hibernation signals) differ significantly. Migration requires PCB layout changes and firmware adaptation - TI provides migration guides but no drop-in replacement exists for this variant.