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Preliminary Spec. ver
1.4
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
10BASE-T DIGITAL BLOCK
The 10BASE-T digital block interfaces a back-end controller to a twisted-pair (TP) cable. The controller interface
includes transmit and receive clock and Manchester data as well as mode control logic and signaling. And the
10BASE-T Transceiver has synthesized clocks derived from a 25 MHz crystal oscillator and five LED drivers for
visual status reporting.
The 10BASE-T Transmit function refers to data transmitted to the twisted-pair network.The Receive function refers
to data received by the back end from the twisted-pair network. In the integrated PLS/MAU mode, the 10BASE-T
Ethernet Interface performs all required MAU functions defined by the IEEE 802.3 10BASE-T specification such as
collision detection, link integrity testing, signal quality error messaging, jabber control and loopback.
The 10Base-T digital block also provides repeater clients an indication that a carrier event has been sensed and an
indication if it is deemed in error. A carrier event is defined as receipt of two non-contiguous ZEROS within any l0
rx_code-bits. A carrier event is in error if it does not start with a Start-of-Stream Delimiter.
10Base-T Digital Block Diagram
100BASE-TX AND 10BASE-T ANALOG BLOCKS
Figure 3-3 shows the Analog Blocks of KS8910 10/100 Mbit/s Ethernet Transceiver.
10Mbit/s Analog Block
100M
10M
100M
10M
TXPLL
WAVE SHAPER
RXPLL
DPLL
Figure 3-3. Analog Blocks of KS8910
MLT-3
DRIVER
100M
BW EQ
RX EQ
SD
10M
RX SQ
FINCTIONAL BLOCKS
TPOP
TPON
TPIP
TPIN
3-5
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