The Physical Coding Sublayer (PCS) for 1000BASE-X operation is defined in IEEE 802.3 clauses 36 and 37 and performs the following:
- Encoding (and decoding) of GMII data octets to form a sequence of ordered sets
- 8B/10B encoding (and decoding) of the sequence ordered sets
- 1000BASE-X Auto-Negotiation for information exchange with the link partner
The Physical Medium Attachment (PMA) for 1000BASE-X operation is defined in IEEE 802.3 clause 36 and performs the following:
- Serialization (and deserialization) of code-groups for transmission (and reception) on the underlying serial Physical Medium Dependent (PMD) sublayer
- Recovery of clock from the 8B/10B coded data supplied by the PMD sublayer
1000BASE-X PCS/PMA functionality is provided by connecting the TEMAC silicon component to a Gigabit Transceiver (GT).