W5100 reset pin tolerance; is it 5 volt?
Ethernet Chips
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Ethernet Chips
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RE: W5100 reset pin tolerance; is it 5 volt?
by Edward ·
Hi.
W5100 Reset Voltage is 3.3V
basically W5100 module is using LDO Regulator.
So, 5V input volt and Low drop 3.3V.
W5100chip operate 3.3Voltage.
don’t using 5Volt.
Thank you
RE: W5100 reset pin tolerance; is it 5 volt?
by hikio ·
Hi Edward, thank you for the reply.
Do you think did i damage the w5100 component?
regards,
Mirac
RE: W5100 reset pin tolerance; is it 5 volt?
by Eugeny ·
Looking into datasheet section 7 “absolute maximum ratings” it says that Vin is 5V-tolerant. It does not exclude RESET from the signal list thus we may assume if you DO NOT hang reset input directly to +5V source (thus creating “unlimited” current) and use resistor or any other logic between +5V and RESET pin you should not damage pin. However you did a good observation - datasheet is not clear about control signals (see page 5, “3.3V operation with 5V I/O signal tolerance” - it says I/O signals).
Anyway, let’s assume that your chip is alive. How your device “does not work” - which symptoms you observe? Did you check supply voltage to be +3V3? Did you check its regulator output to be 1V8? Are you sure you use correct circuit design?