transceiver for transmission and reception of data over
standard CAT-5 unshielded twisted pair (UTP) cable for
automotive applications.
The KSZ8051 is a highly-integrated PHY solution. It reduces
board cost and simplifies board layout by using on-chip
termination resistors for the differential pairs and by
integrating a low-noise regulator to supply the 1.2V core.
The KSZ8051MNLU offers the Media Independent Interface
(MII) and the KSZ8051RNLU offers the Reduced Media
Independent Interface (RMII) for direct connection with
MII/RMII-compliant Ethernet MAC processors and switches.
A 25MHz crystal is used to generate all required clocks,
including the 50MHz RMII reference clock output for the
KSZ8051RNLU.
The KSZ8051 provides diagnostic features to facilitate
system bring-up and debugging in production testing and
in product deployment. Parametric NAND tree support
enables fault detection between KSZ8051 I/Os and the
®
board. Micrel LinkMD TDR-based cable diagnostics
identify faulty copper cabling.
The KSZ8051MNLU and KSZ8051RNLU are available in
32-pin, lead-free QFN packages (see “Ordering
Information”).
Data sheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
Single-chip 10Base-T/100Base-TX IEEE 802.3
compliant Ethernet transceiver
•
AEC-Q100 qualified for automotive applications
•
MII interface support (KSZ8051MNLU)
•
RMII v1.2 Interface support with a 50MHz reference
clock output to MAC, and an option to input a 50MHz
reference clock (KSZ8051RNLU)
•
Back-to-back mode support for a 100Mbps copper
repeater
•
MDC/MDIO management interface for PHY register
configuration
•
Programmable interrupt output
•
LED outputs for link, activity, and speed status indication
•
On-chip termination resistors for the differential pairs
•
Baseline wander correction
•
HP Auto MDI/MDI-X to reliably detect and correct
straight-through and crossover cable connections with
disable and enable option
•
Auto-negotiation to automatically select the highest link-
up speed (10/100Mbps) and duplex (half/full)
•
Power-down and power-saving modes
•
LinkMD TDR-based cable diagnostics to identify faulty
copper cabling
•
Parametric NAND Tree support for fault detection
between chip I/Os and the board
Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
February, 17 2013
Revision 1.0
Micrel, Inc.
KSZ8051MNLU/KSZ8051RNLU
Features (Continued)
•
Loopback modes for diagnostics
•
Single 3.3V power supply with VDD I/O options for
1.8V, 2.5V, or 3.3V
•
Built-in 1.2V regulator for core
•
32-pin (5mm x 5mm) QFN package
Applications
•
Automotive (throughout vehicle)
Ordering Information
Part Number
KSZ8051MNLU
KSZ8051RNLU
Note:
1.
Contact factory for lead time.
(1)
(1)
Temperature
Range
−40°C
to 85°C
−40°C
to 85°C
Package
32-Pin QFN
32-Pin QFN
Lead
Finish
Pb-Free
Pb-Free
Wire
Bonding
Description
MII, Automotive Qualified Device
RMII, Automotive Qualified Device
February 17, 2013
2
Revision 1.0
Micrel, Inc.
KSZ8051MNLU/KSZ8051RNLU
Revision History
Revision
0.1
0.2
1.0
Date
7/6/12
7/9/12
2/17/13
Summary of Changes
Initial Release
Added AEC-Q100 qualified to General Description and Features on page 1.
General upgrade to align to KSZ8081 DS. Loopback details added.
February 17, 2013
3
Revision 1.0
Micrel, Inc.
KSZ8051MNLU/KSZ8051RNLU
Contents
General Description ................................................................................................................................................................ 1
Features .................................................................................................................................................................................. 1
Features (Continued) .............................................................................................................................................................. 2
Ordering Information ............................................................................................................................................................... 2
Revision History ...................................................................................................................................................................... 3
List of Figures .......................................................................................................................................................................... 6
List of Tables ........................................................................................................................................................................... 7
SQE and Jabber Function (10Base-T Only) ........................................................................................................................................ 19
MII Interface (KSZ8051MNLU only) ...................................................................................................................................... 20
MII Signal Definition............................................................................................................................................................................. 20
MII Signal Diagram .............................................................................................................................................................................. 22
RMII Data Interface (KSZ8051RNLU only) ........................................................................................................................... 23
RMII Signal Definition .......................................................................................................................................................................... 23
RMII Signal Diagram ........................................................................................................................................................................... 25
HP Auto MDI/MDI-X .............................................................................................................................................................. 28
Local (Digital) Loopback ...................................................................................................................................................................... 30
NAND Tree Support .............................................................................................................................................................. 31
NAND Tree I/O Testing ....................................................................................................................................................................... 33
®
Power Management .............................................................................................................................................................. 34
Reference Circuit for Power and Ground Connections ......................................................................................................... 35
Absolute Maximum Ratings ................................................................................................................................................ 48
MII SQE Timing (10Base-T) ................................................................................................................................................................ 50
MII Transmit Timing (10Base-T) .......................................................................................................................................................... 51
MII Receive Timing (10Base-T) ........................................................................................................................................................... 52
MII Transmit Timing (100Base-TX) ...................................................................................................................................................... 53
MII Receive Timing (100Base-TX)....................................................................................................................................................... 54
Reference Circuits – LED Strap-In Pins ................................................................................................................................ 60
Reference Clock – Connection and Selection ...................................................................................................................... 61
Magnetics – Connection and Selection ................................................................................................................................. 62
Recommended Land Pattern ................................................................................................................................................ 64
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