Physical coding sublayer
2016-08-23
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The PCS and the PMA are both contained within the physical layer of the OSI reference model.
The PCS and the Gigabit Media Independent Interface (GMII) communicate with one another via 8-bit parallel data lines and several control lines.
The PCS is responsible for encoding each octet passed down from the GMII into ten bit code groups.
The PCS is also responsible for decoding ten bit code groups passed up from the PMA into octets for use by the upper layers.
The PCS also controls the auto-negotiation process which allows two separate gigabit devices to establish a link of which
they are both capable of using.
The PCS and the Gigabit Media Independent Interface (GMII) communicate with one another via 8-bit parallel data lines and several control lines.
The PCS is responsible for encoding each octet passed down from the GMII into ten bit code groups.
The PCS is also responsible for decoding ten bit code groups passed up from the PMA into octets for use by the upper layers.
The PCS also controls the auto-negotiation process which allows two separate gigabit devices to establish a link of which
they are both capable of using.
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