Hello, Harald, Thanks for you response! The value of R9 = 11k. I try to swap it to 12k. Thanks! HK> What's the value of R9? Since Ethernut 2.1 we mount 12k HK> to reduce the current. HK> But indeed, if you follow the SMSC recommendations, using HK> 11k or even 10k, then the chip will reach 50-60 degrees HK> Celsius. Regards, Igor