32 MHz Cortex-M0+ with integrated EEPROM and LCD drive
It packs 192 KB of Flash program memory, 20 KB of SRAM, and 6 KB of true EEPROM — enough for firmware with OTA staging and non-volatile calibration data without an external serial EEPROM. The 64-LQFP package (10x10 mm) gives access to 51 I/O, plus integrated peripherals including a 12-bit ADC (16 channels), a 12-bit DAC (2 channels), an LCD segment driver, and USB, I²C, SPI, and UART connectivity.
Memory and peripheral fit for firmware OTA and data logging
The 192 KB Flash (192K x 8) is the primary code store; the 20 KB SRAM (20K x 8) supports moderate-sized buffers and a real-time OS. The 6 KB EEPROM (6K x 8) is a genuine on-chip EEPROM, not emulated Flash — no wear-leveling needed for frequent parameter writes. The integrated LCD driver (up to 8x40 segments) reduces BOM for metering and control panels.
Active lifecycle — no EOL risk for new designs
For production buyers, this means no imminent obsolescence risk for ongoing builds.
Package and supply rails — layout notes
The 64-LQFP (10x10 mm) is a common footprint with 0.5 mm pitch, suitable for two-layer PCBs with careful routing. The device includes brown-out detect and POR, so external reset supervision is optional. Surface-mount assembly with MSL 3 handling is typical — bake before reflow if the moisture barrier bag has been open past the floor-life window.