It runs at 50 MHz with 16 KB of Flash and 3K x 16 of RAM.
Connectivity covers I²C, SCI, SPI, and UART/USART, enough to talk to a sensor hub, an external EEPROM, or a host controller. The 20 I/O are shared with these serial interfaces, so plan your pin budget early; the 38-TSSOP does not leave much room for expansion.
