According to LTC4269-1 datasheet,
a Type 2 PD must be able to recognize both layers of communications and identify a Type 2 PSE.
According to IEEE802.3at-2009,
Type 2 PDs implement both 2-Event Physical Layer classification (see 18.104.22.168) and Data Link Layer
classification (see 33.6) and advertise a 2-Event class signature of 4.
Will LTC4269-1 recognize PSE through data layer negotiations ?
Or need change PSE register bit through Physical Layer ?
Thanks a lot !