LPC11U2x 32-bit ARM Cortex-M0 microcontroller; up.
NXP
LPC11U22 - 32-bit ARM Cortex-M0 microcontroller
LPC11U2x 32-bit ARM Cortex-M0 microcontroller; up to 32 kB flash; up to 10 kB SRAM and 4 kB EEPROM; USB device; USART Rev. 2.3 — 27 March 2014 Prod.