48 MHz Cortex-M0 with 128 KB Flash — entry-level workhorse
USB without the extra chip
The STM32F0 USB implementation supports device mode natively, which means a simple USB connector and a few passives get you a virtual COM port or a custom HID class — no external PHY or USB-to-UART bridge needed. That saves board area and BOM cost compared to a part that requires an external transceiver.
Active, no end-of-life pressure
ST lists the STM32F070RBT6 as Active.
