Program memory is 16 KB Flash, with 2 KB of SRAM. That is enough for a bootloader plus a modest application — say, a temperature logger with I²C sensor reads and UART output. If your firmware needs a USB stack, a full TCP/IP stack, or over-the-air update logic, you will run out of Flash. Plan the memory map before committing the BOM line.
Industrial temperature range — deployment envelope
Not rated for under-hood or downhole environments where the junction temperature exceeds 85°C. The internal oscillator keeps the clock stable across the full range, eliminating an external crystal in many designs.
On-chip peripherals include brown-out detect, POR, PWM, WDT, and DMA.