Cortina Systems
®
LXT9860/LXT9880
Advanced 10/100 Repeater with
Integrated Management
Datasheet
The Cortina Systems
®
LXT9860/LXT9880 Advanced 10/100 Repeater with Integrated Management
(LXT98x0 Repeater) is the next-generation repeater family, integrated with six/eight 10/100 transceivers.
The LXT98x0 Repeater is compatible with previous generations of Intel* Repeaters from the LXT980 and
LXT918 families. In the LXT9880 Repeater, eight ports directly support 100BASE-TX/10BASE-T copper
media. Two additional Media Independent Interface (MII) ports (10/100 Mbps selectable) connect to
Media Access Controllers (MACs) for bridge/switch applications. The LXT9860 Repeater offers the same
features and functionality in a six-port device.
The LXT98x0 Repeater provides auto-negotiation with parallel detection for the PHY ports. The
LXT98x0 Repeater provides two internal repeater state machines—one operating at 10 Mbps and one at
100 Mbps. Once configured, the LXT98x0 Repeater automatically connects each port to the appropriate
repeater. The LXT98x0 Repeater also provides two Inter-Repeater Backplanes (IRBs) for expansion —
one operating at 10 Mbps and one at 100 Mbps. Up to 240 twisted-pair and MII ports can logically be
combined into one repeater. The LXT98x0 Repeater supports SNMP and RMON management via
on-chip 32- and 64-bit counters. The counters and control functions are accessible via a high-speed
Serial Management Interface (SMI).
Product Features
Six or eight 10/100 ports with integrated
twisted-pair PHYs including integrated filters.
Two 10/100 MIIs for bridging.
Independent segments for 10 Mbps and
100 Mbps operation.
Cascadable Inter-Repeater Backplanes (IRBs),
with option for 5 V stacking compatibility.
Hardware assist for RMON and the Repeater
MIB.
High-speed Serial Management Interface
(SMI).
Two address-tracking registers per port.
Source Address matching function.
Integrated LED drivers with user-selectable
modes.
Available in 208-pin QFP package.
Operating temperature range: 0-70
°
C,
ambient.
Available in extended temperature range:
-40 to +85
°
C, ambient.
Note:
The LXT9880 Repeater and the LXT9860 Repeater are not recommended for new
designs. Contact your Cortina Systems, Inc. representative for product availability.
LXT98x0 Repeater
Datasheet
248987, Revision 5.0
14 August 2007
Legal Disclaimers
This document contains information proprietary to Cortina Systems, Inc. (Cortina). Any use or disclosure, in whole or in part, of this
information to any unauthorized party, for any purposes other than that for which it is provided is expressly prohibited except as
authorized by Cortina in writing. Cortina reserves its rights to pursue both civil and criminal penalties for copying or disclosure of
this material without authorization.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH CORTINA SYSTEMS
®
PRODUCTS.
NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS
GRANTED BY THIS DOCUMENT.
EXCEPT AS PROVIDED IN CORTINA’S TERMS AND CONDITIONS OF SALE OF SUCH PRODUCTS, CORTINA ASSUMES
NO LIABILITY WHATSOEVER, AND CORTINA DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE
SALE AND/OR USE OF CORTINA PRODUCTS, INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A
PARTICULAR PURPOSE, MERCHANTABILITY OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER
INTELLECTUAL PROPERTY RIGHT.
Cortina products are not intended for use in medical, life saving, life sustaining, critical control or safety systems, or in nuclear
facility applications.
Cortina Systems
®
and the Cortina Systems logo are the trademarks or registered trademarks of Cortina Systems, Inc. and its
subsidiaries in the U.S. and other countries. Other names and brands may be claimed as the property of others.
Copyright © 2001−2007 Cortina Systems, Inc. All rights reserved.
Cortina Systems
®
LXT9860/LXT9880 Advanced 10/100 Repeater with Integrated Management
Page 2
LXT98x0 Repeater
Datasheet
248987, Revision 5.0
14 August 2007
Contents
Contents
1.0
2.0
Pin Assignments and Signal Descriptions ............................................................................... 10
Functional Description................................................................................................................ 29
2.1
2.2
Introduction ......................................................................................................................... 29
Port Configuration............................................................................................................... 30
2.2.1 Auto-Negotiation .................................................................................................... 30
2.2.2 Forced Operation ................................................................................................... 30
2.2.3 Changing Port Speed - Forced .............................................................................. 30
2.2.4 Link Establishment and Port Connection ............................................................... 30
2.2.5 MII Port Configuration ............................................................................................ 31
Interface Descriptions ......................................................................................................... 31
2.3.1 Twisted-Pair Interface ............................................................................................ 31
2.3.2 Media Independent Interface ................................................................................. 31
2.3.3 Serial Management Interface................................................................................. 32
2.3.4 Serial PROM Interface ........................................................................................... 32
Repeater Operation ............................................................................................................ 32
2.4.1 100 Mbps Repeater Operation .............................................................................. 33
2.4.2 10 Mbps Repeater Operation ................................................................................ 34
Management Support ......................................................................................................... 34
2.5.1 Configuration and Status ....................................................................................... 34
2.5.2 SNMP and RMON Support .................................................................................... 35
2.5.3 Source Address Management ............................................................................... 35
Requirements ..................................................................................................................... 35
2.6.1 Power.....................................................................................................................35
2.6.2 Clock ...................................................................................................................... 35
2.6.3 Bias Resistor.......................................................................................................... 35
2.6.4 Reset .....................................................................................................................35
2.6.5 PROM .................................................................................................................... 36
2.6.6 Chip ID ...................................................................................................................36
2.6.7 Management Master I/O Link ................................................................................ 36
2.6.8 IRB Bus Pull-ups.................................................................................................... 36
LED Operation .................................................................................................................... 37
2.7.1 LEDs at Start-up .................................................................................................... 37
2.7.2 LED Event Stretching ............................................................................................ 37
2.7.3 LED Blink Rates..................................................................................................... 37
2.7.4 Serial LED Interface............................................................................................... 37
2.7.5 Direct Drive LEDs .................................................................................................. 40
2.7.6 LED Modes ............................................................................................................ 40
IRB Operation ..................................................................................................................... 45
2.8.1 IRB Signal Types ................................................................................................... 46
2.8.2 IRB Isolation .......................................................................................................... 46
2.8.3 10 Mbps-Only Operation........................................................................................ 46
2.8.4 LXT98x/91x/98x0 Compatibility ............................................................................. 46
MII Port Operation .............................................................................................................. 49
2.9.1 Preamble Handling ................................................................................................ 49
Serial Management I/F ....................................................................................................... 50
2.10.1 SMI Signals............................................................................................................ 50
2.10.2 Read and Write Operations ................................................................................... 51
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
Cortina Systems
®
LXT9860/LXT9880 Advanced 10/100 Repeater with Integrated Management
Page 3
LXT98x0 Repeater
Datasheet
248987, Revision 5.0
14 August 2007
Contents
2.11
2.12
3.0
3.1
3.2
3.3
2.10.3 Address Assignment Methods ............................................................................... 55
2.10.4 Interrupt Functions ................................................................................................. 57
Serial PROM Interface........................................................................................................ 57
Serial Configuration Interface .............................................................................................58
General Design Guidelines ................................................................................................. 60
Typical Applications ............................................................................................................ 60
Application Circuitry ............................................................................................................ 61
3.3.1 Power and Ground................................................................................................. 61
3.3.2 MII Terminations .................................................................................................... 63
3.3.3 Twisted-Pair Interface ............................................................................................ 64
3.3.4 Clock ...................................................................................................................... 65
3.3.5 SMI and PROM Circuits......................................................................................... 66
3.3.6 LED Circuits ...........................................................................................................67
Inter-Repeater Backplane Compatibility ............................................................................. 69
3.4.1 Local Backplane—3.3 V Only ................................................................................ 70
3.4.2 Stack Backplane—3.3 V or 5 V ............................................................................. 70
Application Information .............................................................................................................. 60
3.4
4.0
5.0
Test Specifications ...................................................................................................................... 73
Register Definitions..................................................................................................................... 87
5.1
5.2
Register Map ...................................................................................................................... 87
Counter Registers............................................................................................................... 95
5.2.1 Port Counter Registers .......................................................................................... 96
5.2.2 RMON Counter Registers ...................................................................................... 97
Ethernet Address Registers ..............................................................................................100
5.3.1 Port Address Registers ........................................................................................100
5.3.2 Search Address Registers ...................................................................................100
Repeater Port Control Registers.......................................................................................102
5.4.1 General Port Control Registers............................................................................102
5.4.2 Port Link Control Register....................................................................................103
5.4.3 Port Learn Enable Register .................................................................................104
Repeater Port Status Registers ........................................................................................104
PHY Port Status Registers ...............................................................................................105
PHY Port Control Registers ..............................................................................................109
Repeater Port Control/Status Registers ...........................................................................110
5.8.1 Device/Revision Register.....................................................................................112
5.8.2 LED Control Registers .........................................................................................113
5.8.3 LED Global Control Register ...............................................................................113
5.8.4 Port LED Control Register ...................................................................................113
5.8.5 LED Timer Control Register.................................................................................114
5.8.6 Repeater Reset Register .....................................................................................115
5.8.7 Software Reset Register ......................................................................................115
5.8.8 Interrupt Registers ...............................................................................................115
Serial Controller Registers ................................................................................................117
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
Mechanical Specifications ........................................................................................................119
Cortina Systems
®
LXT9860/LXT9880 Advanced 10/100 Repeater with Integrated Management
Page 4
LXT98x0 Repeater
Datasheet
248987, Revision 5.0
14 August 2007
Figures
Figures
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
Block Diagram ................................................................................................................................. 9
Pin Assignments............................................................................................................................ 10
Typical LXT988x Managed Repeater Architectures ...................................................................... 29
MII Interface................................................................................................................................... 32
LED Blink Rates ............................................................................................................................ 37
Serial LED Shift Loading ............................................................................................................... 38
Serial LED Port Signaling .............................................................................................................. 39
100 Mbps IRB Connection............................................................................................................. 47
IRB Block Diagram ........................................................................................................................ 48
LXT9880 Repeater MII Operation ................................................................................................. 50
Typical SMI Bus Architecture ........................................................................................................ 50
SMI Collision Handling .................................................................................................................. 52
SMI Address Match Indication ....................................................................................................... 52
Serial Management Frame Format................................................................................................ 53
Address Arbitration Mechanisms ................................................................................................... 56
Optional R/W Serial PROM Interface ............................................................................................ 58
Serial Configuration Interface ........................................................................................................ 59
Serial Configuration Interface Signaling ........................................................................................ 59
8-Port Managed 10/100 Stackable Repeater ................................................................................ 60
32-Port Managed 10/100 Repeater ...............................................................................................61
Power and Ground Connections ................................................................................................... 63
Typical Twisted-Pair Port Interface and Power Supply Filtering....................................................65
Typical Serial Management Interface Connections ....................................................................... 66
Serial Controller Connection Showing PAL ................................................................................... 66
Serial PROM Interface................................................................................................................... 67
Typical Reset Circuit...................................................................................................................... 67
LED Circuits - Direct Drive & Multiplexed Configuration Inputs ..................................................... 68
Serial LED Circuit .......................................................................................................................... 69
100 Mbps Backplane Connection between LXT98x and LXT98x0 Repeater................................ 71
Typical 100 Mbps IRB Implementation .......................................................................................... 72
Typical 10 Mbps IRB Implementation ............................................................................................72
100 Mbps TP Port-to-Port Delay Timing........................................................................................ 77
100BASE-TX MII-to-TP Port Timing ..............................................................................................78
100BASE-TX TP-to-MII Timing ..................................................................................................... 79
10BASE-T MII-to-TP Timing .......................................................................................................... 80
10BASE-T TP-to-MII Timing .......................................................................................................... 81
100 Mbps TP-to-IRB Timing .......................................................................................................... 82
10 Mbps TP-to-IRB Timing ............................................................................................................ 82
10 Mbps IRB-to-TP Port Timing .................................................................................................... 83
Serial Management Interface Timing............................................................................................. 84
PROM Interface Timing ................................................................................................................. 85
Package Specifications for Commercial Temperature ................................................................119
LXT98x0 Repeater Package Specifications for Extended Temperature .....................................120
Cortina Systems
®
LXT9860/LXT9880 Advanced 10/100 Repeater with Integrated Management
Page 5
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