Texas Instruments TM4C1231H6PMI7R

Overview

TM4C1231H6PMI7R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB flash, 32 KB SRAM, integrated USB 2.0 OTG, two CAN 2.0A/B controllers, and 12-bit ADC with 12 channels - deployed in industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the TM4C1231H6PMI7R datasheet, TM4C1231H6PMI7R pinout, TM4C1231H6PMI7R application, or TM4C1231H6PMI7R equivalent, key selection criteria include its 80 MHz CPU clock, hibernation module with RTC and battery-backed memory, dual CAN interfaces, USB device/host/OTG support, and 100-pin LQFP package with configurable GPIOs and analog inputs.

Technical Context

The TM4C1231H6PMI7R integrates a single-core ARM Cortex-M4F processor with hardware floating-point unit (FPU), supporting Thumb-2 and DSP instructions. It features a 32-bit bus architecture, NVIC with 80 interrupt lines, and memory protection unit (MPU) for secure task isolation.

System-level integration includes a hibernation module with real-time clock, battery-backed RAM, and VBAT monitoring; μDMA controller with 32-channel capability; and peripheral-specific clock gating for dynamic power management across UART, SPI, I²C, PWM, and timer modules.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, operating temperature range –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM, TM4C1231H6PMI7R trades EEPROM for hibernation capability and RTC retention - making it superior for low-power always-on monitoring. Against STM32F407VGT6, it offers tighter CAN/USB integration and lower entry-level BOM cost, though at reduced clock headroom and memory scale.

Availability

TM4C1231H6PMI7R is available at Aetrix Electronics and suitable for industrial motor control, smart sensor gateways, and USB human interface devices requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceable sourcing.

Supply support for TM4C1231H6PMI7R 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 TM4C1231H6PMI7R - was designed specifically for cost-sensitive, real-time embedded applications requiring mixed-signal integration, low-power operation, and robust connectivity (CAN, USB, analog).

FAQ

What is the maximum operating frequency of the TM4C1231H6PMI7R?

The TM4C1231H6PMI7R operates at a maximum CPU clock frequency of 80 MHz, achieved using the internal PLL with an external crystal or oscillator input. This frequency is fully supported across the full industrial temperature range (–40°C to +85°C) and enables deterministic real-time execution for control loops and communication stacks. The TM4C1231H6PMI7R achieves this performance while maintaining low active power consumption through dynamic clock gating and voltage scaling.

Does the TM4C1231H6PMI7R support USB device, host, and OTG modes simultaneously?

Yes, the TM4C1231H6PMI7R integrates a full-speed USB 2.0 OTG controller that supports device, host, and OTG roles in hardware. Mode selection is determined dynamically by VBUS detection and ID pin state, allowing seamless switching without firmware reconfiguration. The TM4C1231H6PMI7R includes dedicated USB PHY, endpoint buffers, and ROM-based USB stack support - eliminating need for external transceivers or protocol firmware in most implementations.

How much battery-backed memory does the TM4C1231H6PMI7R provide in hibernation mode?

The TM4C1231H6PMI7R provides 2 KB of battery-backed SRAM accessible during hibernation mode, retaining data even when main VDD is removed. This memory is paired with a real-time clock (RTC), VBAT monitoring circuitry, and wake-on-external-interrupt capability. The TM4C1231H6PMI7R uses this resource to preserve critical system state, timestamps, and configuration parameters - enabling fast wake-up with minimal initialization overhead.

What analog capabilities does the TM4C1231H6PMI7R offer?

The TM4C1231H6PMI7R includes a 12-bit, 1 MSPS analog-to-digital converter with 12 input channels, hardware sample averaging, digital comparators, and an internal temperature sensor. It supports both single-ended and differential sampling modes, with programmable trigger sources including PWM events and timer matches. These features make the TM4C1231H6PMI7R suitable for precision analog acquisition in motor control, power monitoring, and environmental sensing applications.

Is the TM4C1231H6PMI7R pin-compatible with other Tiva C Series microcontrollers?

The TM4C1231H6PMI7R uses a 100-pin LQFP package with a defined pinout documented in the official datasheet, but it is not universally pin-compatible across all Tiva C Series variants. While some members like TM4C123GH6PM share the same package and footprint, differences in peripheral assignment (e.g., absence of EEPROM signals, presence of hibernation-specific pins) mean PCB layout must be verified per device. Always consult the specific TM4C1231H6PMI7R pin map before board reuse.