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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i 11 Revision 1.0 (05-28-09)
DATASHEET
Figure 1.2 LAN8720/LAN8720i Architectural Overview
10M Rx
Logic
100M Rx
Logic
DSP System:
Clock
Data Recovery
Equalizer
Analog-to-
Digital
100M PLL
Squelch &
Filters
10M PLL
Receive Section
Central
Bias
HP Auto-MDIX
Management
Control
SMI
RMII Logic
TXP / TXN
TXD[1:0]
TXEN
RXD[1:0]
RXER
CRS_DV
MDC
MDIO
LED1
LED2
LED Circuitry
MODE Control
nINT
nRST
RXP / RXN
10M Tx
Logic
10M
Transmitter
100M Tx
Logic
100M
Transmitter
Transmit Section
PLL
XTAL1/CLKIN
XTAL2
MODE0
MODE1
MODE2
PHY
Address
Latches
PHYAD0
Auto-
Negotiation
Interrupt
Generator
MDIX
Control
Reset
Control
RBIAS