Denon AVR-X4000 Service Manual page 188

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
2.1 Pin Assignments
LAN8720A Pin Function
PIN NUM
1
2
3
4
5
6
7
8
9
10
11
12
LAN8720A Block Diagram
MODE[0:2]
nRST
RMIISEL
TXD[0:1]
TXEN
RXD[0:1]
RXER
CRS_DV
MDC
MDIO
Revision 1.3 (04-20-11)
SMSC LAN8720A/LAN8720Ai
Table 2.8 24-QFN Package Pin Assignments
PIN NAME
VDD2A
LED2/nINTSEL
LED1/REGOFF
XTAL2
XTAL1/CLKIN
VDDCR
10/100
RXD1/MODE1
LAN8720A/
RMII
Ethernet
LAN8720Ai
MAC
RXD0/MODE0
Mode
VDDIO
RXER/PHYAD0
Crystal or
CRS_DV/MODE2
Oscillator
MDIO
Figure 1.1 System Block Diagram
Mode Control
Auto-
Negotiation
Reset Control
Management
SMI
Control
100M RX
Logic
10M RX
Logic
LAN8720A/LAN8720Ai
Figure 1.2 Architectural Overview
DATASHEET
PIN NUM
13
14
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
15
16
17
18
19
MDI
Transformer
20
LED
21
22
Clock
23
24
100M TX 100M
Logic Transmitter
Transmitter
10M TX 10M
Logic Transmitter
Analog-to-
DSP System:
Digital
Clock
Data Recovery
Equalizer
100M PLL
Receiver
Squeltch
& Filters
10M PLL
8
15
DATASHEET
188
PIN NAME
MDC
nINT/REFCLKO
nRST
Datasheet
TXEN
TXD0
TXD1
VDD1A
RJ45
TXN
TXP
RXN
RXP
RBIAS
HP Auto-MDIX
TXP/TXN
RXP/RXN
MDIX
Control
XTAL1/CLKIN
PLL
XTAL2
Interrupt
nINT
Generator
LED1
LEDs
LED2
RBIAS
Central Bias
PHY Address
PHYAD0
Latches
SMSC LAN8720A/LAN8720Ai
Revision 1.3 (04-20-11)