Texas Instruments TM4C1231H6PMI7

Overview

TM4C1231H6PMI7 from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB Flash, 32 KB SRAM, and integrated analog peripherals including a 12-bit 1-MSPS ADC with 12 channels. It features USB 2.0 OTG, multiple UARTs, I²C, SPI, PWM, and hibernation mode for ultra-low-power operation. It serves as the main control unit in industrial sensor nodes requiring real-time processing, connectivity, and battery longevity.

For engineers reviewing the TM4C1231H6PMI7 datasheet, TM4C1231H6PMI7 pinout, TM4C1231H6PMI7 application, or TM4C1231H6PMI7 equivalent, key selection considerations include its 80 MHz CPU clock, USB OTG capability, hibernation current of 1.7 µA, 12-bit ADC resolution, and QFP-64 package compatibility with TI's TivaWare™ software stack.

Technical Context

The TM4C1231H6PMI7 integrates an ARM Cortex-M4F core with hardware floating-point unit (FPU), supporting single-precision IEEE 754 operations and DSP instructions. Its memory subsystem includes 256 KB on-chip Flash with error correction, 32 KB SRAM, and 2 KB EEPROM - all accessible via tightly coupled bus architecture for deterministic interrupt latency.

Peripherals are organized into autonomous modules with configurable clock gating and power domains: the hibernation module enables retention of RTC, battery-backed RAM, and wake-on-external-interrupt; the μDMA controller supports 32-channel scatter-gather transfers without CPU intervention; and the ADC supports hardware averaging, digital comparators, and temperature sensor input.

Key Specifications

Pinout & Package

TM4C1231H6PMI7 is housed in a 64-pin LQFP (Pb-free, RoHS-compliant) package with 0.5 mm lead pitch and exposed thermal pad. Pin functions support multiplexed I/O, dedicated JTAG/SWD debug, USB D+/D–, and analog inputs routed to internal ADC and comparator blocks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM and STM32F401CEU6, the TM4C1231H6PMI7 uniquely balances USB OTG integration, sub-2 µA hibernate current, and production-ready TivaWare drivers - making it optimal for compact, battery-constrained USB-peripheral designs without CAN or high-memory demands.

Availability

TM4C1231H6PMI7 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB-capable data loggers, and motor control edge nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for TM4C1231H6PMI7 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 delivering high-reliability microcontrollers for industrial and automotive markets.

The TM4C1231H6PMI7 belongs to TI's Tiva C Series - designed specifically for cost-sensitive, power-aware embedded applications requiring USB connectivity, analog integration, and robust real-time performance without external support chips.

FAQ

What is the maximum operating frequency of the TM4C1231H6PMI7?

The TM4C1231H6PMI7 operates at a maximum system clock frequency of 80 MHz, derived from its internal precision oscillator or external crystal source. This frequency is fully supported across all peripherals and memory interfaces under specified voltage (3.3 V) and temperature (–40°C to +85°C) conditions. The TM4C1231H6PMI7 maintains timing compliance for USB 2.0 full-speed operation, ADC sampling at 1 MSPS, and PWM generation up to 80 MHz resolution.

Does the TM4C1231H6PMI7 include an integrated USB physical layer (PHY)?

Yes, the TM4C1231H6PMI7 integrates a full-speed USB 2.0 OTG PHY compliant with USB specification revision 2.0. It supports both device and host modes without requiring external transceivers. The TM4C1231H6PMI7 provides dedicated USB0DP and USB0DM pins with internal termination and slew-rate control, enabling direct connection to standard USB connectors per TI's layout guidelines.

What is the hibernate current specification for the TM4C1231H6PMI7?

The TM4C1231H6PMI7 achieves a typical hibernate current of 1.7 µA when the hibernation module is active with RTC running and 2 KB of hibernate RAM retained. This value is measured at 3.3 V and 25°C per the official Texas Instruments production datasheet (SPMS339E). The TM4C1231H6PMI7 maintains this ultra-low power state while supporting wake-up via RTC alarm, external GPIO, or HIB interrupt - critical for multi-year battery operation.

How much on-chip Flash and SRAM does the TM4C1231H6PMI7 provide?

The TM4C1231H6PMI7 includes 256 KB of on-chip Flash memory with error correction coding (ECC) and 32 KB of general-purpose SRAM. Additionally, it provides 2 KB of EEPROM for wear-levelled nonvolatile storage. These memory resources are directly accessible by the Cortex-M4F core with zero wait-state operation at 80 MHz, enabling efficient execution of real-time control algorithms and communication stacks within the TM4C1231H6PMI7.

Is the TM4C1231H6PMI7 pin-compatible with other Tiva C Series microcontrollers?

The TM4C1231H6PMI7 uses a 64-pin LQFP package identical in footprint and pinout to the TM4C123GH6PM and TM4C123BH6PM variants. However, functional differences exist: the TM4C1231H6PMI7 omits CAN controllers present in those parts and optimizes power domains for hibernation. While PCB layout is reusable, firmware and peripheral initialization must account for missing CAN modules and distinct hibernate rail behavior in the TM4C1231H6PMI7.