192 KB Flash, 20 KB RAM, 6 KB EEPROM — memory headroom for the firmware stack
Program memory is 192 KB of Flash, paired with 20 KB of SRAM and a separate 6 KB EEPROM block. The EEPROM is useful for calibration constants or configuration data that need byte-level writes without wear-leveling overhead. The 20 KB RAM supports moderate data buffering — enough for a USB CDC class or a small RTOS heap — but a design with large frame buffers or heavy audio processing will need to budget carefully.
32 MHz ARM Cortex-M0+ with 16-channel ADC and LCD drive
The core runs at 32 MHz, which is the speed ceiling for this ultra-low-power family. The integrated LCD driver (up to 8x40 segments) and the USB 2.0 full-speed interface make this a fit for metering, human-machine interface, and portable instrumentation designs.
The 64-LQFP package (10x10 mm) with 51 I/Os provides enough GPIO for parallel buses or a keypad matrix without resorting to a larger BGA.