SLVSF02D March 2019 – May 2020 TPS23881
COMMAND = 1Ch with 1 Data Byte, Read Only
|LEGEND: R/W = Read/Write; R = Read only; -n = value after reset|
|7–4||ACn||R||0000b||Auto Class Detection Status
1 = PD supports Auto Class
0 = PD does not support Auto Class
|3–2||CC34_2/1||R||00b||Connection Check result for 4-Pair port (channels 3 and 4)|
|1-0||CC12_2/1||R||00b||Connection Check result for 4-Pair port (channels 1 and 2)|
The auto class detection measurement is completed at the end of the long classification finger, and if a PD is determined to support auto class, an auto class power measurement will be automatically completed after turn on in accordance with the IEEE auto class timing requirements.
The auto class function is operational regardless if a port is wired for 2-Pair or 4-Pair operation.
For 4-Pair single signature devices, both ACn bits will report the same result even though the classification measurement was completed on one channel.
An Auto Class power measurement will be completed shortly after power on for all channels that are found to support auto class during classification.
These measurement results are available in registers (0x51h – 0x54h), and the auto class power measurements are provide per individual channel.
A connection check measurement will only be performed on 4-pair wired ports after at least one channel is found to have a valid detection result.
The results of connection check
|0||0||"unknown" or incomplete|
These bits will be set following the completion of a connection check and prior to the setting of the Detection Event bits in the Detection Event register (0x04h).