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PDF ( 数据手册 , 数据表 ) WBLXT9785E

零件编号 WBLXT9785E
描述 Advanced 8-Port 10/100 Mbps PHY Transceivers
制造商 intel
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WBLXT9785E 数据手册, 描述, 功能
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Intel® LXT9785 and Intel® LXT9785E
Advanced 8-Port 10/100 Mbps PHY
Transceivers
Datasheet
The Intel® LXT9785 and Intel® LXT9785E are 8-port Fast Ethernet PHY Transceivers
supporting IEEE 802.3 physical layer applications at 10 Mbps and 100 Mbps. These devices
provide Serial/Source Synchronous Serial Media Independent Interfaces (SMII/SS-SMII) and
Reduced Media Independent Interface (RMII) for switching and other independent port
applications. The LXT9785 and LXT9785E are identical except for the IP telephony features
included in the LXT9785E transceiver. The LXT9785E is an enhanced version of the LXT9785
that detects Data Terminal Equipment (DTE) requiring power from the switch over a CAT5
cable. The system uses the information collected by the LXT97985E to apply power if the DTE
at the far end requires power over the cable, such as an IP telephone.
Each network port can provide a twisted-pair (TP) or Low-Voltage Positive Emitter Coupled
Logic (LVPECL) interface. The twisted-pair interface supports 10 Mbps and 100 Mbps
(10BASE-T and 100BASE-TX) Ethernet over twisted-pair. The LVPECL interface supports
100 Mbps (100BASE-FX) Ethernet over fiber-optic media.
The LXT9785/LXT9785E provides three discrete LED driver outputs for each port. The devices
support both half-duplex and full-duplex operation at 10 Mbps and 100 Mbps and require only a
single 2.5 V power supply.
Applications
„ Enterprise switches
„ IP telephony switches
Product Features
„ Storage Area Networks
„ Multi-port Network Interface Cards (NICs)
„ Eight IEEE 802.3-compliant 10BASE-T or
100BASE-TX ports with integrated filters.
„ 100BASE-FX fiber-optic capability on all
ports.
„ 2.5 V operation.
„ Low power consumption; 250 mW per port
typical.
„ Multiple RMII or SMII/SS-SMII ports for
independent PHY port operation.
„ Auto MDI/MDIX crossover capability.
„ Proprietary Optimal Signal Processing™
architecture improves SNR by 3 dB over
ideal analog filters.
„ Optimized for dual-high stacked RJ-45
applications.
„ MDIO sectionalization into 2x4 or 1x8
configurations.
„ Supports both auto-negotiation systems and
legacy systems without auto-negotiation
capability.
„ Robust baseline wander correction.
„ Configurable through the MDIO port or
external control pins.
„ JTAG boundary scan.
„ 208-pin PQFP: LXT9785HC,
LXT9785EHC, LXT9785HE.
„ 241-ball BGA: LXT9785BC,
LXT9785EBC.
„ 196-ball BGA: LXT9785MBC
„ DTE detection for remote powering
applications (LXT9785E only).
„ Extended temperature operation of -40oC to
+85oC (LXT9785HE).
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003







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Contents
18 Intel® LXT9785/LXT9785E RMII BGA23 Ball List in Alphanumeric Order by Signal Name ...... 52
19 Intel® LXT9785/LXT9785E RMII BGA23 Ball List in Alphanumeric Order by Ball Location ...... 57
20 Intel® LXT9785/LXT9785E SMII BGA23 Ball List in Alphanumeric Order by Signal Name....... 62
21 Intel® LXT9785/LXT9785E SMII BGA23 Ball List in Alphanumeric Order by Ball Location....... 67
22 Intel® LXT9785/LXT9785E SS-SMII BGA23 Ball List in Alphanumeric Order by Signal Name. 72
23 Intel® LXT9785/LXT9785E SS-SMII BGA23 Ball List in Alphanumeric Order by Ball Location. 77
24 Intel® LXT9785/LXT9785E RMII Signal Descriptions – BGA23 ................................................. 82
25 Intel® LXT9785/LXT9785E SMII / SS-SMII Common Signal Descriptions – BGA23 ................. 85
26 Intel® LXT9785/LXT9785E SMII Specific Signal Descriptions – BGA23 .................................... 85
27 Intel® LXT9785/LXT9785E SS-SMII Specific Signal Descriptions – BGA23 .............................. 86
28 Intel® LXT9785/LXT9785E MDIO Control Interface Signals – BGA23 ....................................... 87
29 Intel® LXT9785/LXT9785E Signal Detect – BGA23 ................................................................... 88
30 Intel® LXT9785/LXT9785E Network Interface Signal Descriptions – BGA23............................. 88
31 Intel® LXT9785/LXT9785E JTAG Test Signal Descriptions – BGA23........................................ 89
32 Intel® LXT9785/LXT9785E Miscellaneous Signal Descriptions – BGA23 .................................. 90
33 Intel® LXT9785/LXT9785E LED Signal Descriptions – BGA23 .................................................. 94
34 Intel® LXT9785/LXT9785E Power Supply Signal Descriptions – BGA23................................... 95
35 Intel® LXT9785/LXT9785E Unused/Reserved Pins – BGA23 .................................................... 97
36 Intel® LXT9785/LXT9785E Receive FIFO Depth Configurations ............................................... 97
37 Intel® LXT9785MBC BGA15 Ball List in Alphanumeric Order by Signal Name ......................... 99
38 Intel® LXT9785MBC BGA15 Ball List in Alphanumeric Order by Ball Location
(SMII/SS-SMII) ......................................................................................................................... 103
39 Intel® LXT9785 BGA15 Signal Descriptions ............................................................................ 109
40 Intel® LXT9785/LXT9785E MDIX Selection ............................................................................. 119
41 Intel® LXT9785/LXT9785E MII Mode Select ............................................................................ 120
42 Intel® LXT9785/9785E Global Hardware Configuration Settings ............................................. 129
43 Intel® LXT9785/LXT9785E SMII Signal Summary ................................................................... 132
44 Intel® LXT9785/LXT9785E RX Status Encoding Bit Definitions ............................................... 137
45 Intel® LXT9785/LXT9785E SS-SMII ......................................................................................... 138
46 4B/5B Coding ........................................................................................................................... 147
47 Next Page Message #5 Code Word Definitions ....................................................................... 155
48 BSR Mode of Operation ........................................................................................................... 159
49 Supported JTAG Instructions ................................................................................................... 159
50 Intel® LXT9785/LXT9785E Magnetics Requirements .............................................................. 166
51 Intel® LXT9785/LXT9785E Absolute Maximum Ratings .......................................................... 173
52 Intel® LXT9785/LXT9785E Operating Conditions .................................................................... 173
53 Intel® LXT9785/LXT9785E Digital I/O DC Electrical Characteristics (VCCIO = 2.5 V +/- 5%) . 174
54 Intel® LXT9785/LXT9785E Digital I/O DC Electrical Characteristics (VCCIO = 3.3 V +/- 5%) . 175
55 Intel® LXT9785/LXT9785E Digital I/O DC Electrical Characteristics – SD Pins ....................... 175
56 Intel® LXT9785/LXT9785E Required Clock Characteristics ..................................................... 175
57 Intel® LXT9785/LXT9785E 100BASE-TX Transceiver Characteristics .................................... 176
58 Intel® LXT9785/LXT9785E 100BASE-FX Transceiver Characteristics .................................... 176
59 Intel® LXT9785/LXT9785E 10BASE-T Transceiver Characteristics......................................... 177
60 Intel® LXT9785/LXT9785E SMII - 100BASE-TX Receive Timing Parameters ......................... 178
61 Intel® LXT9785/LXT9785E SMII - 100BASE-TX Transmit Timing Parameters ........................ 179
62 Intel® LXT9785/LXT9785E SMII - 100BASE-FX Receive Timing Parameters ......................... 180
63 Intel® LXT9785/LXT9785E SMII - 100BASE-FX Transmit Timing Parameters ........................ 181
64 Intel® LXT9785/LXT9785E SMII - 10BASE-T Receive Timing Parameters ............................. 182
65 Intel® LXT9785/LXT9785E SMII-10BASE-T Transmit Timing Parameters .............................. 183
66 Intel® LXT9785/LXT9785E SS-SMII - 100BASE-TX Receive Timing Parameters ................... 184
8 Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003







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LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
1.0
1.1
1.2
Introduction
This document contains information on the Intel® LXT9785/LXT9785E Advanced 8-port
10/100 Mbps Fast Ethernet transceivers.
What You Will Find in This Document
This document contains the following sections:
Section 3.0, “Pin/Ball Assignments and Signal Descriptions” on page 20
This section contains pin/ball assignments and signal descriptions for the following:
Section 3.1, “PQFP Pin Assignments” on page 20
Section 3.2, “PQFP Signal Descriptions” on page 36
Section 3.3, “BGA23 Ball Assignments” on page 51
Section 3.4, “BGA23 Signal Descriptions” on page 82
Section 3.5, “BGA15 Ball Assignments” on page 98
Section 3.6, “BGA15 Signal Descriptions” on page 109
Section 4.0, “Functional Description” on page 116
Section 5.0, “Application Information” on page 164
Section 6.0, “Test Specifications” on page 173
Section 7.0, “Register Definitions” on page 199
Section 8.0, “Package Specifications” on page 221
Section 9.0, “Ordering Information” on page 227
Related Documents
Document
Intel® LXT9785/LXT9785E Design and Layout Guide
Intel® LXT9785/LXT9785E Specification Update
Intel® LXT9785/LXT9785E 100BASE-FX Fiber Optic Transceivers: Connecting a PECL/
LVPECL Interface
IP Telephony and DTE Discovery Using Intel Ethernet® PHYs
Document
Number
249509
249357
250781
249611
18 Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003










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零件编号描述制造商
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WBLXT9785EAdvanced 8-Port 10/100 Mbps PHY Transceiversintel
intel

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