7.1.6 MCP2221A USB-to-UART/I2C Serial Converter
The MCP2221A is a USB-to-UART/I2C serial converter which enables USB connectivity in applications that have UART and I2C interfaces. The device reduces external components by integrating the USB termination resistors and the oscillator needed for USB operation. MCP2221A has four GP pins providing miscellaneous functionalities (GPIO, USBCFG, SSPND, Clock Output, ADC, DAC, interrupt detector).