ethersex/ethersex — pull request #156 by owagner (2012-07-02 18:59:47+00:00)
Title: Enc ecocon set

ENC28J60: added the possibility to set the ENC ECOCON (CLKOUT prescaler) register early during network initialization.

The CLKOUT pin may then be used to clock other peripherals or even the
AVR itself. When not initialized, the register defaults to 4, specifying
a 6.25 MHz clock, which is a good enough clock during startup.

The default behavior is to not modify ECOCON at all.

Details for using the CLKOUT pin on the ENC and the ECOCON register
are available in section 2.3 of the ENC datasheet.