3 ports switch with W5100

Question

Hi, I’m using the W5100 in my project and all works well. By now I want to implement in my boards a 3 way switch to have the possibility to configure the lan in line instead star. I see some chips like micrel or Asix to do it, but before starting the project, I ask wich is the best way to follow in order to implement this feature. Is possible to use the MII or the RGMII with the W5100? There is any schematic to do it? Regards Giuseppe

jckim · Answer

Sorry, It is not possible to use the MII or the RGMII with the W5100. Thanks,

miaooaim · Answer

Thank you for your reply, so, in your opinion, which is the best way to implement a 3 way switch on my board? Reards Giuseppe

miaooaim · Answer

Ok, the right answer was: Change the W5100 with W3150A+ and then use the Microchip LAN9303 ethernet switch. The W3150+ is fully software compatible with W5100, so hardware change is the only work to do. Thank you. Regards

loreno · Answer

Hello miaooaim, i have your same need to connect several devices in daisy chain. I’d like to know if you’ve reached your goal using W3150A+ and LAN9303. Thank you very much! Best regards

miaooaim · Answer

Hi Ioreno, yes, it works very well. Our devices are using this solution since 2014 and we don’t have any problem by now. Regards.

miaooaim · Answer

Cattura864×580 109 KB

Time Slice · Answer

Dear Giuseppe I am trying to implement what you have done with 3150 and 9303. I have working 5100 unit, so I am going to follow your reference design and replace 5100 with 3150 and 9303. I cannot seem to read the picture well. Would you mind sending me the readable file of the schematics? Thanks C.

miaooaim · Answer

Hope these are useful. Regards G. Page_1-2.pdf (1.5 MB) Page_2-2.pdf (2.1 MB)

miaooaim · Answer

Ask, if I can I’ll help you

miaooaim · Answer

XA is the board microprocessor address bus. XB is the board microprocessor data bus. Signal from/to microprocessor are also: /CS, /RD, /WE and /IRQ_EXP. The addressing of 3150 is with 2 address line only. SJ13-19-20-21 are solder joint pad on printed circuit. You have to select the LAN9303 functional mode. In my case “Chiuso” means “Closed” and “Aperto” means “Open”. SJ7-8-9-10-11-12 are also soder joint pad, but with the possibility to switch the pins 2 and 4 in 2 way. “Chiudere” means “Close” the couple of pad indicate after. I suggest you to study the LAN9303 datasheet to understand why I’ve done this circuit solution. Regards