Looking for some help with program encoder

Hello I have an encoder RM22S with Absolute binary synchro-serial interface (SSI) (from Renishaw company). My question is how I can build the clock with 4MHz with 13 bit resolution, using Atmega328 or Atmega2560? Any help will be appreciated.

Thank you, Alechco

I think you can run the SPI interface at 4 MHz. You would need to do two 8-bit 'transfers' to get 13 bits of data but I think that might work.

I think you'll need some RS422A drivers/receivers to translate the signals to something the Arduino can accept.