Technical parameters for N3Ethernet

Good day!
I have many questions about the use of NetDuino. To begin with, such questions.
What are the technical parameters for N3E?
For example: What is the maximum frequency for the output of the SCK SPI?
If the SPI is working in Master mode, is NSS being used?
Can analog inputs A0 to A5 be used as digital outputs?
Maybe there is documentation with a description of the parameter? Tell me where can.