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Preliminary Spec. ver
1.4
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
4
100 BASE-TX DIGITAL BLOCKS
OVERVIEW
This chapter describes the physical coding sublayer (PCS), physical medium attachment (PMA) sublayer, and the
physical medium dependent sublayer (PMD) for comprehension of the 100Base-TX within the KS8910.
This is based upon the IEEE 802.3U/D5.3 specification and ANSI X3.263:1995 TP-PMD, Revision 2.2 (1 March
1995) specification.
PHYSICAL CODING SUBLAYER (PCS)
The PCS interface is the Media Independent Interface (MII) which provides a uniform interface to the Reconciliation
Sublayer for 100Base-TX of the KS8910.
The KS8910' s PCS realizes the following functions:
•
Encoding (decoding) of MII data nibbles to (from) 5-bit code-groups (4B/5B)
•
Generating Carrier Sense and Collision Detect indications
•
Serialization (deserialization) of code-groups for transmission (reception) on the underlaying serial PMA
•
Mapping of Transmit, Receive, Carrier Sense and Collision Detection between the MII and the underlying PMA
100BASE-TX DIGITAL BLOCKS
4-1
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