256 KB Flash, 24 KB SRAM — sizing the firmware budget
The STM32F100ZCT6B: The 256 KB Flash and 24 KB SRAM fit a bare-metal control loop or a small RTOS. The Flash runs at 24 MHz with zero wait states.
The base product number STM32F100 spans multiple density and package options, so a future migration within the same family footprint is possible if requirements change.
144-LQFP — 112 I/O in a 20x20 mm body
The 144-pin LQFP (20x20 mm) gives access to 112 I/O lines, enough for parallel LCD data buses, multiple UART/SPI/I²C peripherals, and a bank of GPIO for keypad or sensor readout. The 0.5 mm pitch requires careful PCB routing but is standard for two-layer boards with a ground plane.
Peripherals: ADC, DAC, PWM, and serial interfaces
PWM outputs from the advanced-control timer drive three-phase motors.
