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An innovative approach was taken to reduce the number of I/O required to interface to the Ethernet Controller. Using a standard 4-wire SPI interface Ethernet controller, similar features could be accomplished when adding Ethernet to the design. Due to the lesser number of I/O required to the host microcontroller, now a 64-pin device could be considered while maintaining the same features. In this design implementation, the advantages associated with the interface and board space are compared with the previously discussed implementation.
PTM Published on: 2011-11-03
