Texas Instruments TM4C1233H6PMI7

Overview

TM4C1233H6PMI7 from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 256 KB flash, 32 KB SRAM, integrated USB 2.0 device controller, 12-bit ADC (1 MSPS, 12 channels), and 48 GPIOs in a 64-pin LQFP package. It serves as a main system controller in industrial HMI, motor control interfaces, and sensor aggregation nodes.

For engineers reviewing the TM4C1233H6PMI7 datasheet, TM4C1233H6PMI7 pinout, TM4C1233H6PMI7 application, or TM4C1233H6PMI7 equivalent, key selection criteria include its USB device capability, hibernation module with RTC and battery-backed memory, deterministic floating-point performance, and support for TivaWare™ software stack in resource-constrained embedded designs.

Technical Context

The TM4C1233H6PMI7 integrates an ARM Cortex-M4F core with hardware FPU, enabling single-cycle IEEE 754-compliant floating-point math. Its system-level integration includes a hibernation module with dedicated VBAT supply, real-time clock, and 2 KB of battery-backed SRAM - all operable at ≤2 µA sleep current.

Peripherals are tightly coupled via the μDMA controller supporting 32-channel arbitration and peripheral-to-memory transfers without CPU intervention. Clock management uses a multi-source PLL with internal precision oscillator (±1% over temperature) and external crystal support up to 25 MHz.

Key Specifications

Pinout & Package

TM4C1233H6PMI7 is housed in a 64-pin LQFP package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin functions are defined per TI SPMS351E datasheet Rev E (June 2014), with dedicated JTAG/SWD debug, USB D+/D−, hibernate VBAT, and multiple GPIO groups mapped to peripherals including UART, PWM, I²C, and SPI.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM, TM4C1233H6PMI7 removes Ethernet to reduce cost and power while retaining USB device functionality; versus STM32F401CEU6, it offers native USB PHY and hibernation hardware - lowering component count and simplifying low-power design for battery-operated edge nodes.

Availability

TM4C1233H6PMI7 is available at Aetrix Electronics and suitable for industrial HMI, smart sensor nodes, motor control interfaces, USB serial gateways, and battery-backed data loggers requiring stable component supply across long production lifecycles.

Supply support for TM4C1233H6PMI7 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets since 1930.

The Tiva C Series - including TM4C1233H6PMI7 - was designed specifically for cost-sensitive, real-time embedded applications demanding USB connectivity, low-power operation, and rich peripheral integration without external support chips.

FAQ

What is the maximum operating frequency of the TM4C1233H6PMI7?

The TM4C1233H6PMI7 operates at a maximum CPU frequency of 80 MHz using its internal PLL. This frequency is achievable with either the internal precision oscillator (±1% accuracy) or an external crystal up to 25 MHz. The TM4C1233H6PMI7 maintains full peripheral functionality - including USB, ADC, and PWM - at this speed, and its Cortex-M4F core sustains deterministic instruction timing critical for real-time control loops.

Does the TM4C1233H6PMI7 support USB host mode?

No, the TM4C1233H6PMI7 supports USB 2.0 device mode only, with an integrated full-speed (12 Mbps) transceiver. It cannot act as a USB host or OTG controller. Applications requiring host functionality - such as reading USB flash drives - must use a companion USB host IC or select a different MCU family like TM4C129x, which includes dual-role USB support. The TM4C1233H6PMI7's USB interface is optimized for CDC, HID, and MSC device-class implementations.

What is the purpose of the VBAT pin on the TM4C1233H6PMI7?

VBAT on the TM4C1233H6PMI7 supplies the hibernation module independently of main VDD. When connected to a coin cell or supercapacitor, it powers the real-time clock, 2 KB of battery-backed SRAM, and associated control logic during main power removal. This enables the TM4C1233H6PMI7 to retain time-of-day, calibration data, and system state while drawing ≤2 µA - a key enabler for battery-backed data loggers and fail-safe industrial controllers where uninterrupted timekeeping is required.

Can the TM4C1233H6PMI7 execute code directly from RAM?

Yes, the TM4C1233H6PMI7 supports executing code from its 32 KB on-chip SRAM. This capability is used for time-critical routines (e.g., interrupt handlers, PID loops) to avoid flash wait-state latency. Code can be loaded into SRAM at runtime via debugger or bootloader, and execution is enabled by setting the appropriate vector table offset and memory protection unit (MPU) permissions. However, SRAM is volatile - contents are lost on reset unless preserved via hibernate SRAM or external storage.

How many UART peripherals does the TM4C1233H6PMI7 include?

The TM4C1233H6PMI7 includes eight UART modules (UART0–UART7), each with independent FIFOs, programmable baud-rate generators, and support for modem handshaking, IrDA, and ISO 7816 smart-card protocols. These UARTs can be mapped to multiple GPIO pins via the peripheral multiplexer, allowing flexible routing in dense PCB layouts. All eight UARTs remain fully functional simultaneously - a feature leveraged in protocol gateways that bridge Modbus RTU, ASCII, and custom serial protocols to USB or Ethernet.