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FUNCTIONAL BLOCKS
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Mapping of transmit and receive code-bits between the PMA' s client and the underlying PMD,
•
Generating a control signal indicating the availability of the PMD to a PCS or other client and synchronizing
with Auto-Negotiation
•
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 underlying serial PMA.
•
Mapping of Transmit, Receive, Carrier Sense and Collision Detection between the MII and the underlying PMA.
MANAGEMENT AGENT
A management interface having dedicated registers used to communicate Auto-Negotiation information to the MII
that includes the control, status, advertisement, link partner ability, and expansion registers.
POWER MANAGEMENT
Power management is performed on the transceiver by monitoring data stream activity and powering down
segments of the chip to conserve power. The power-down modes selected are based on maximizing power
conservation on-board the Transceiver chip.
Auto Power Down Function(10/100Mbps)
CONTROL REGISTERS / STATUS REGISTERS
The control and status registers set are used to control and monitor the 10Base-T/100Base-TX Transceiver chip
and can be accessed through the MII management interface. The management interface consists of a pair of
signals which physically transport the management information across the MII, a frame format and a protocol
specification for exchanging management frames, and a register set which can be read and written using these
frames. The register definition specifies a basic register set with a extension mechanism.
AUTO-NEGOTIATION
The Auto-negotiation provides a mechanism to control connection of a single MDI to a single PMA type, where
more than one PMA type may exist. Management may provide additional control of Auto-negotiation through the
management function, but the presence of a management agent is not required.
The Auto-negotiation function provides the Auto-Negotiation Transmit, Receive, Arbitration, and Normal Link
Pulses (NLP) receive link integrity test functions. The Auto-negotiation functions interact with technology
dependent PMA' s through the technology dependent interface. The Technology dependent interface includes
10Base-T/100Base-TX and 100Base-T4.The KS8910 does not support 100Base-T4.
3-2
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
Preliminary Spec. ver
1.4
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