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LAN8820I Datasheet(PDF) 4 Page - Microchip Technology

Part # LAN8820I
Description  RGMII 10/100/1000 Ethernet Transceiver
PDF  83 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8820I Datasheet(HTML) 4 Page - Microchip Technology

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LAN8820/LAN8820I
DS00001871B-page 4
 2009-2015 Microchip Technology Inc.
1.0
INTRODUCTION
The LAN8820/LAN8820i is a low-power 10BASE-T/100BASE-TX/1000BASE-T Gigabit Ethernet physical layer (PHY)
transceiver that is fully compliant with the IEEE 802.3 and 802.3ab standards.
The LAN8820/LAN8820i can be configured to communicate with an Ethernet MAC via the standard RGMII interface. It
contains a full-duplex transceiver for 1000Mbps operation on four pairs of category 5 or better balanced twisted pair
cable. Per IEEE 802.3-2005 standards, all digital interface pins are tolerant to 3.6V.
The LAN8820/LAN8820i is configurable via hardware and software, supporting both IEEE 802.3-2005 compliant and
vendor-specific register functions via SMI. The LAN8820/LAN8820i implements Auto-Negotiation to automatically
determine the best possible speed and duplex mode of operation. HP Auto-MDIX support allows the use of direct con-
nect or cross-over cables.
An internal block diagram of the LAN8820/LAN8820i is shown in Figure 1-1. A typical system-level diagram is shown in
Figure 1-2.
FIGURE 1-1:
INTERNAL BLOCK DIAGRAM
FIGURE 1-2:
SYSTEM LEVEL BLOCK DIAGRAM
LAN8820/LAN8820i
RGMII
3
2
1
Active
Hybrid
0
10/100/1000
Ethernet
3
2
1
Analog
RX
0
3
2
1
Analog
TX
0
3
2
1
DSP
0
3
2
1
Spectral
Shaper
0
Digital TX
Scrambler
Trellis
4DPAM-5 Encoders
Digital RX
Descrambler
Viterbi Decoder
4DPAM-5 Decoders
3
2
1
0
3
2
1
0
3
2
1
0
3
2
1
0
Physical
Coding
Sublayer
TAP
Controller
LEDs
PLL
LEDs
JTAG
3
2
1
0
32
1
0
LAN8820/
LAN8820i
10/100/1000
Ethernet MAC
LED
Status
RGMII
Crystal
MDI
Ethernet
Magnetics
JTAG
Ethernet



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