KS8001
1.8V, 3.3V 10/100BASETX/FX
Physical Layer Transceiver
DATASHEET V 1.01
General Description
The KS8001 is a 10BASE-T/100BASE-TX/FX Physical
Layer Transceiver, operating the core at 1.8 volts to meet
low voltage and low power requirements. The solution
provides MII/RMII/SMII interfaces to transmit and receive
data.
A unique mixed-signal design extends signaling
distance while reducing power consumption.
HP Auto MDI/MDI-X provides the most robust solution for
eliminating the need to differentiate between crossover and
straight-through cables.
Featuring LinkMD cable diagnostics, which allows
detection of common cabling plant problems such as open
and short circuits, the KS8001 represents a new level of
features and performance and is an ideal choice of
physical layer transceiver for 100BASE-TX/10BASE-
T/100BASE-FX applications.
Features
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Single chip 100BASE-TX/100BASE-FX/10BASE-T
physical layer solution
1.8V CMOS design, power consumption 250 mW
Robust (130m+) operation over standard cables
Supports Media Independent Interface (MII), Reduced
MII (RMII), and Serial MII (SMII)
LinkMD feature to determine cable length and
diagnose faulty cables up 200 m with +/- 2 m accuracy
Supports HP MDI/MDI-X auto crossover
Supports power down mode and power saving mode
MDC/MDIO to 12.5 MHz for rapid configuration
Fully compliant to IEEE 802.3u standard
Supports auto-negotiation and manual selection for
10/100Mbps speed and full / half-duplex mode
Functional Diagram
NRZ/NRZI
MLT3 ENCODER
4B/5B ENCODER
SCRAMBLER
PARALLEL/SERIAL
TX+
TX-
TRANSMITTER
10/100
PULSE
SHAPER
PARALLEL/SERIAL
MANCHESTER ENCODER
RX+
RX-
ADAPTIVE EQ
BASELINE WANDER
CORRECTION
MLT3 DECODER
NRZI/NRZ
CLOCK
RECOVERY
4B/5B DECODER
DESCRAMBLER
SERIAL/PARALLEL
MII/RMII/SMII
REGISTERS
AND
CONTROLLER
INTERFACE
AUTO
NEGOTIATION
10BASE-T
RECEIVER
MANCHESTER DECODER
SERIAL/PARALLEL
TXD3
TXD2
TXD1
TXD0
TXER
TXC
TXEN
CRS
COL
MDIO
MDC
RXD3
RXD2
RXD1
RXD0
RXER
RXDV
RXC
POWER DOWN/
POWER SAVING
LINK
LED
DRIVER
XI
XO
COL
FDX
SPD
PLL
PWRDWN
Micrel, Inc.
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1849 Fortune Drive
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San Jose, CA 95131
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USA
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tel + 1 (408) 944-0800
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fax + 1 (408) 944-0970
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http://www.micrel.com
May 2005
KS8001
MICREL CONFIDENTIAL. DO NOT DISTRIBUTE.
1
MICREL [ MICREL SEMICONDUCTOR ]
