LED Not active

Question

Hello I have a W5500 chip on my custom board. When i plug in the ETH cable the LED not blink both Link and Act. I try to check follow this topic Link LED - #2 by Coccoliso check all bias resistor i can’t solve my ploblem. Please check my schematic. Thank you Capture1185×797 266 KB

Eugeny · Answer

Would 1k resistors provide enough current for the LEDs to be lit? Why 50 Ohms instead of required 49.9 1% Ohms? Are they 1%? Why 6.8 picofarads instead of 6.8 nanofarads? What “ferrite” is used here? Is chip accessible through SPI?

scott · Answer

@kiazoo Your capacitor is wrong. 6.8pF → 6.8nF If we can fix this and the problem continues, Your symptoms are caused by improper PCB design. Did you refer to the design guide at the URL below? https://wizwiki.net/wiki/doku.php/design_guide:hardware:start Thank you.

kiazoo · Answer

Thank for all reply. this case my MCU can access the W5500 chip. i use same controller and wire to W5500 module (i got it from alibaba) it 's work. In circuit ferrite is 33Ohm. i use 50Ohm resistor because it’s best i can find in my local seller. but capacitor is my wrong i will fix it first.