32 KB flash with 2 KB RAM — sizing the firmware and data budget
The STM8S105K6T6CTR: The 32 KB (32K x 8) program memory is the firmware image ceiling — a UART bootloader, HAL, and application stack must fit within that boundary, with the 2K x 8 SRAM handling the runtime data heap and stack. The 1K x 8 EEPROM stores calibration constants or configuration parameters that survive power cycles without external serial memory — useful for field-set thresholds or node addresses.
Peripheral set for sensor and actuator control
The 7-channel 10-bit ADC reads analog sensors (thermistors, potentiometers, current shunts) without an external converter — enough resolution for threshold detection and slow-loop feedback. Built-in brown-out detect and POR eliminate external reset supervisor ICs in cost-sensitive designs; the PWM outputs drive LEDs, small DC motors, or solenoid valves directly through a driver transistor.
Package and board integration — 32-LQFP 7x7 mm
The 32-LQFP package with 0.8 mm pitch and a 7x7 mm body is a standard footprint — two-layer boards fan out the peripheral pins without blind vias, and hand-soldering or rework is straightforward with a fine-tip iron.