Bus Width Configuration; Bus Access Timing Configuration - Wiznet W5300 Porting Manual

2.1. Bus Width configuration

The Bus Width which connected from MCU to W5300 must be sets to 16bit. In general, the
setting of MCU Bus sets in the initialize routine of Bootloader. Please confirm the settings
about MCU Bus from the MCU datasheet.
For example, the S3C2410 which is the MCU of W5300E01-ARM sets the Bus width by using
BWSCON(0x48000000) register. At the W5300E01-ARM board, the CS pin of W5300 is connected
to CS2 pin<Fig 2>. In the BWSCON register, the bus width of CS2 sets to 16bit.

2.2. Bus access timing configuration

Please set the Bus access timing which access from MCU to W5300.
The /CS low time of access timing in W5300 has been set to 65ns when read timing and it has
been set to 50ns when write timing. (Refer to the 'High-performance Internet Connectivity
Solution – W5300', '7 Electrical Specifications')
Copyright © WIZnet All Rights Reserved
< Fig 2. A part circuit diagram of W5300E01-ARM >
W5300 Linux Driver Porting Guide | 7 page