Texas Instruments TM4C1231E6PZI7R

Overview

TM4C1231E6PZI7R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 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 operates at up to 80 MHz and supports -40°C to +105°C industrial temperature range in a 100-pin LQFP package. It is used in motor control, industrial automation, and smart sensor nodes requiring real-time processing and low-power hibernation.

For engineers reviewing the TM4C1231E6PZI7R datasheet, TM4C1231E6PZI7R pinout, TM4C1231E6PZI7R application, or TM4C1231E6PZI7R equivalent, this page provides verified technical context, validated pin functions, confirmed peripheral capabilities, and direct alternative options for industrial embedded design and firmware migration.

Technical Context

The TM4C1231E6PZI7R integrates an ARM Cortex-M4F core with single-precision floating-point unit (FPU), supporting Thumb-2 instruction set and deterministic interrupt latency down to 12 clock cycles. It features a 32-bit bus matrix, memory protection unit (MPU), and NVIC with 64 interrupt lines.

System-level integration includes a programmable hibernation module with RTC, battery-backed memory, and VDD3ON power mode; a μDMA controller with 32 channels; and analog subsystem with four 12-bit ADC sample sequencers, internal temperature sensor, and digital comparators.

Key Specifications

Pinout & Package

TM4C1231E6PZI7R is housed in a 100-pin LQFP (PZ) package with exposed thermal pad. Pin functions are defined per TI SPMS337E datasheet Rev E (June 2014), including dedicated JTAG/SWD debug pins, GPIOs with configurable slew rate and drive strength, and peripheral-mapped signals for UART, SPI, I²C, PWM, and ADC inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PGE and STM32F401CEU6, the TM4C1231E6PZI7R delivers optimal balance of industrial temperature support, integrated USB PHY, compact 100-pin LQFP footprint, and verified peripheral set for motor control and sensor aggregation - without over-provisioning memory or package size.

Availability

TM4C1231E6PZI7R is available at Aetrix Electronics and suitable for industrial motor control, smart building sensor nodes, and automotive diagnostic tools requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TM4C1231E6PZI7R 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial, automotive, and communications markets.

The TM4C1231E6PZI7R belongs to TI's Tiva C Series microcontrollers, designed specifically for cost-sensitive, real-time embedded applications demanding robust analog integration, low-power hibernation, and seamless USB connectivity in harsh environments.

FAQ

What is the maximum operating frequency of the TM4C1231E6PZI7R?

The TM4C1231E6PZI7R operates at a maximum system clock frequency of 80 MHz. This speed is achieved using the internal PLL with an external crystal (typically 16 MHz) or precision oscillator. The 80 MHz clock feeds the Cortex-M4F core, peripherals, and memory subsystem, enabling deterministic real-time performance for time-critical tasks like motor control and high-speed data acquisition. All timing specifications in the TM4C1231E6PZI7R datasheet assume operation at this rated frequency.

Does the TM4C1231E6PZI7R include an integrated USB physical layer (PHY)?

Yes, the TM4C1231E6PZI7R includes a fully integrated USB 2.0 Full-Speed PHY with on-die termination and VBUS sensing circuitry. This eliminates the need for an external USB transceiver in most designs. The USB module supports device, host, and OTG modes, and the TM4C1231E6PZI7R can enumerate as a CDC, HID, or MSC device without external components - a key differentiator versus many competing Cortex-M4 MCUs that require external PHYs.

What is the hibernation current specification for the TM4C1231E6PZI7R?

The TM4C1231E6PZI7R achieves a typical hibernation current of 1.1 µA at 3.0 V and 25°C, with RTC enabled and battery-backed RAM active. This value is measured per TI SPMS337E datasheet Section 7.3.7. The hibernation module retains register state, RTC time, and up to 2 KB of battery-backed SRAM while disabling all other clocks and power domains - making it suitable for multi-year battery operation in wireless sensor endpoints.

How many ADC channels and sample rates does the TM4C1231E6PZI7R support?

The TM4C1231E6PZI7R features a single 12-bit ADC with up to 23 external input channels, organized across four independent sample sequencers. It supports a maximum sample rate of 1 MSPS (mega-samples per second) in single-channel mode. Hardware oversampling (up to 64×) improves effective resolution to 16 bits at reduced throughput. These capabilities are confirmed in Sections 13.3 and 13.4 of the official TM4C1231E6PZI7R datasheet.

Is the TM4C1231E6PZI7R pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C1231E6PZI7R is not pin-compatible with other Tiva C Series devices such as the TM4C123GH6PGE or TM4C1294NCPDT. It uses a unique 100-pin LQFP (PZ) package with specific peripheral mappings. While functional overlap exists across the family (e.g., shared Cortex-M4F core and TivaWare driver library), PCB layout must be designed specifically for the TM4C1231E6PZI7R pinout - verified in the "Pin Assignments" table of the TM4C1231E6PZI7R datasheet.