KSZ8001L(2005) 查看數據表（PDF） - Micrel
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KSZ8001L Datasheet PDF : 44 Pages
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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.
Functional Diagram
KS8001
1.8V, 3.3V 10/100BASETX/FX
Physical Layer Transceiver
DATASHEET V 1.01
Features
• 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
TX+
TX-
TRANSMITTER
10/100
PULSE
SHAPER
RX+
RX-
ADAPTIVE EQ
BASELINE WANDER
CORRECTION
MLT3 DECODER
NRZI/NRZ
10BASE-T
RECEIVER
XI
PLL
XO
NRZ/NRZI
MLT3 ENCODER
CLOCK
RECOVERY
AUTO
NEGOTIATION
4B/5B ENCODER
SCRAMBLER
PARALLEL/SERIAL
PARALLEL/SERIAL
MANCHESTER ENCODER
4B/5B DECODER
DESCRAMBLER
SERIAL/PARALLEL
MANCHESTER DECODER
SERIAL/PARALLEL
MII/RMII/SMII
REGISTERS
AND
CONTROLLER
INTERFACE
TXD3
TXD2
TXD1
TXD0
TXER
TXC
TXEN
CRS
COL
MDIO
MDC
RXD3
RXD2
RXD1
RXD0
RXER
RXDV
RXC
POWER DOWN/
POWER SAVING
PWRDWN
LED
DRIVER
LINK
COL
FDX
SPD
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2005
MICREL CONFIDENTIAL. DO NOT DISTRIBUTE.
1
KS8001
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