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Chip Thrills – I’m in Love with the Wiznet W5500

October 24, 2014

I haven’t really dug into the datasheet but I’m excited about the Wiznet W5500. It’s a TCP/IP chip, generally compatible with the W5100 that I use in the web server but it allows streaming data transfer. With the w5100 every byte transferred is a separate transaction. Raising and lowering slave select, sending a command, a two byte address, and a single byte of data. That’s painful for the 1802: even with the spi clock set over 3mhz so i can send a byte every instruction time, i have to send four times as many bytes and futz around changing registers to send them from different locations; I also have to calculate the buffer address every time and wrap it around at the end of the buffer. The result is an effective transfer rate of only a few thousand bytes per second. With the W5500 you send only the command and starting address then stream the payload bytes uninterrupted. I need to find a shield or breakout board to really try it but I’m seriously looking forward to it. The module below is in a wiki on the seeed web site but i don’t see a link to actually buy it.
14-10-24 seeedW5500


From → web server

  1. Reblogged this on wizneteu.

  2. Bongjun Hur permalink

    Wow~ good report for me.
    Do you need WIZ550io module? I can send one sample for you~~
    If you need, please notify me your address to get the sample.
    Although it has a little inconvenience to use comparing to W5500Ethernet Shield you found, it is also useful for you.

Trackbacks & Pingbacks

  1. Wiznet W5500 Ethernet Shield Available on iteadstudio | olduino
  2. Wiznet W5500 Module and Shield | olduino

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