80 MHz Cortex-M4F with FPU — what it means on the bench
The TM4C123BE6PZI is a 32-bit ARM Cortex-M4F microcontroller from TI's Tiva C series, clocked at 80 MHz with a hardware floating-point unit. That FPU is the main differentiator versus a plain Cortex-M3 — single-cycle MAC and divide for sensor fusion or motor-current loops without software emulation overhead. The 128 KB Flash and 32 KB SRAM fit a CANopen or Modbus RTU stack plus a modest control loop; the 22-channel 12-bit ADC covers multi-sensor acquisition without an external mux. Industrial temperature range (-40°C to 85°C) suits factory-floor, outdoor telecom, and engine-bay environments.
128 KB Flash and 32 KB RAM — sizing the firmware
128 KB Flash and 32 KB SRAM in a 100-LQFP package. A CANopen master stack fits; a full EtherCAT stack does not.
Connectivity and peripheral set
On-chip CAN 2.0B controller (with external transceiver) connects directly to industrial fieldbus or automotive powertrain networks. The peripheral set includes I²C, SPI, SSI, UART, IrDA, Microwire, QEI for quadrature encoder feedback, and a motion-PWM timer set for BLDC or stepper drive. Brown-out reset, POR, and watchdog are integrated — no external supervisor needed for basic safety monitoring.