80 MHz Cortex-M4F with FPU — what it means for the control loop
The TM4C1236H6PMIR is a Texas Instruments Tiva C Series 32-bit ARM Cortex-M4F MCU clocked at 80 MHz, with a single-precision floating-point unit that accelerates PID loops, sensor fusion, and digital filter math without a separate DSP coprocessor. The 256 KB Flash and 32 KB RAM support a moderate firmware image with room for a real-time OS kernel and a few hundred kilobytes of data buffers. This part is aimed at industrial control nodes, motor-drive commutation, and CAN-bridged human-machine interfaces where the FPU and the 12-channel 12-bit ADC eliminate the need for an external analog front-end.
Connectivity and I/O — CAN, USB OTG, and serial links
Connectivity includes CAN, USB OTG, I²C, SPI, SSI, UART/USART, IrDA, and Microwire. The 49 GPIOs in the 64-LQFP package leave headroom for a small keypad, a character LCD, and a few discrete I/O lines alongside the serial peripherals. The internal oscillator keeps the BOM simple for applications that do not require an external crystal for USB timing.
Industrial temperature range and package
Rated for -40°C to 85°C ambient, this MCU suits factory-floor enclosures, outdoor telecom cabinets, and engine-bay-adjacent electronics where commercial-grade parts would drift or latch up. The 64-LQFP package (10x10 mm body) is a standard footprint for industrial control PCBs; rework and inspection are straightforward with a hot-air station or IR oven.
Lifecycle and sourcing reality
The TM4C1236H6PMIR is listed as Active in production — no last-time-buy or phase-out notice on record. This part is available through independent distribution; we source and quote it to order against an RFQ, with current pricing and availability confirmed at quote time. For dual-sourcing or supply resilience, the base product number TM4C1236 covers multiple Flash/RAM density variants in the same 64-LQFP footprint, so a BOM can be qualified across the family without a PCB spin.