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Topic: DIY Ethernet shield (W5100) (Read 7 times) previous topic - next topic

Jack Christensen

Nice work! What is the reset problem with the W5100 you mentioned? I have an "official" Arduino Ethernet shield and haven't had any reset issues that I'm aware of.
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

Dzhus

It was present on older revisions of official ethernet shield.
The problem is that Wiznet chip required long 0 signal on reset line
to start properly. The workaround (also used in Freetronics shield)
is to add a small capacitor on reset line.
The problem was resolved in later versions of shield (v5 and v6)
when they added STM811 controller to handle reset.

Jack Christensen


The problem was resolved in later versions of shield (v5 and v6)
when they added STM811 controller to handle reset.


Ah, that explains it. Pretty sure I have one with the reset controller. I've also been using some WIZ811MJ modules, and using a separate MCU pin to reset them.
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

alucardo18

Does this chip has to be  burn some bootloader or program. or it's built in function for MC?? i  want to do something similar with that chip

Dzhus

Nope, W5100 is ready to go without any extra firmware. Arduino MCUs use SPI to communicate to W5100.

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