Cable Detection Process for W6100 Chip

Question

We are currently working with the W6100 chip and would like to understand the process for detecting a connected cable. For some connection the chip seems not to be able to detect connected cable. For detection we are using the PHYCFGR register and bit 0. Sometimes it doesn’t detect the connected cable, and since then it cannot detect any connection, even if connected to previously working router. This status persist till repower of device. Schema of our connection: image1213×748 82.9 KB

Eugeny · Answer

Power quality? Does power supply have enough rating? Why 1k resistors on reset and int lines? Are you able to read registers when issue happens? Does it recover if you disable/reset PHY using PHYCFGR? What is the value of PHYCFGR before, when it works, and after, when it locks up? What is part number for L11/L12? Check for components values at the PHY side.