16 MHz core, 8 KB Flash — what the memory budget means
The STM8L001J3M3TR: For a simple control loop — reading a sensor over I²C, logging a parameter to EEPROM, and driving a PWM output — the 8 KB Flash holds a compact firmware image with room for a bootloader; the 1.5 KB SRAM leaves headroom for a modest stack and a few buffers. The 2 KB EEPROM stores calibration constants or fault logs without wearing the Flash.
In an 8-SOIC package, the 0.154-inch body width fits a 2-layer PCB with a minimal footprint — the six GPIOs route directly to a sensor header or a transistor array.
Peripheral set for sensor and actuator control
On-chip peripherals include DMA for memory-to-peripheral transfers without CPU load, a PWM timer for motor or LED dimming, and a watchdog timer for fail-safe reset. Connectivity covers I²C, SPI, and UART/USART — enough to interface a temperature sensor, a small display, or a radio module.