I am planning to use the SAMD21J18A for a new project.
When using AVR or XMEGA I have always used an 11.0592Mhz crystal for UART purposes.
Do we need to use an external crystal such 11.0592Mhz for the purpose of UART or USB on the SAM?
I might also incorporate a USB connection to an external module(GSM). If understood correctly the SAM device be set as a HOST, so it should be able to connect to the module. The reason for using USB is to achieve a higher data rate compared to UART.
I will be using a 32.768Khz to wake up the device when it goes into sleep mode, can this be used to stabilize or calibrate an internal clock?