8-bit core with 16 MHz ceiling
The STM8L152K6T6 runs an STM8 core at 16 MHz — enough throughput for sensor polling loops, LCD segment updates, and UART/I²C transaction handling without needing a clock tree or PLL. The 8-bit architecture keeps the code footprint small and the interrupt latency predictable.
On-chip memory and data storage
32 KB flash program memory holds moderate firmware with a bootloader and application code. 2 KB RAM is the working memory ceiling — data buffers for ADC scans or serial packets need careful budgeting. The 1 KB EEPROM stores calibration constants, configuration parameters, or fault logs without requiring an external serial EEPROM.
Analog and peripheral integration
21-channel 12-bit ADC covers multi-sensor analog inputs — temperature, pressure, battery voltage — with enough resolution for 0.1% measurement. A single 12-bit DAC provides one analog output for setpoint control or signal generation. The on-chip LCD driver directly drives segment LCD glass, eliminating a separate display controller. DMA moves data between peripherals and memory without CPU intervention, useful for continuous ADC sampling or UART streaming.
Serial connectivity and I/O count
The 7x7 mm LQFP is hand-solderable and routes on a 2-layer board without difficulty.