
LAN8720A Pin Function
LAN8720A Block Diagram
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720A/LAN8720Ai
15
Revision 1.3 (04-20-11)
DATASHEET
2.1
Pin Assignments
Table 2.8 24-QFN Package Pin Assignments
PIN NUM
PIN NAME
PIN NUM
PIN NAME
1
VDD2A
13
MDC
2
LED2/nINTSEL
14
nINT/REFCLKO
3
LED1/REGOFF
15
nRST
4
XTAL2
16
TXEN
5
XTAL1/CLKIN
17
TXD0
6
VDDCR
18
TXD1
7
RXD1/MODE1
19
VDD1A
8
RXD0/MODE0
20
TXN
9
VDDIO
21
TXP
10
RXER/PHYAD0
22
RXN
11
CRS_DV/MODE2
23
RXP
12
MDIO
24
RBIAS
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.3 (04-20-11)
8
SMSC LAN8720A/LAN8720Ai
DATASHEET
Figure 1.1 System Block Diagram
Figure 1.2 Architectural Overview
LAN8720A/
LAN8720Ai
10/100
Ethernet
MAC
RMII
Mode
LED
Transformer
Crystal or
Clock
Oscillator
MDI
RJ45
R
M
II
Lo
gi
c
Interrupt
Generator
LEDs
PLL
Receiver
DSP System:
Clock
Data Recovery
Equalizer
Squeltch
& Filters
Analog-to-
Digital
10M RX
Logic
100M RX
Logic
100M PLL
10M PLL
Transmitter
10M
Transmitter
100M
Transmitter
10M TX
Logic
100M TX
Logic
Central Bias
PHY Address
Latches
LAN8720A/LAN8720Ai
RBIAS
LED1
nINT
XTAL2
XTAL1/CLKIN
LED2
Management
Control
Mode Control
Reset Control
MDIX
Control
HP Auto-MDIX
RXP/RXN
TXP/TXN
TXD[0:1]
TXEN
RXD[0:1]
RXER
CRS_DV
MDC
MDIO
Auto-
Negotiation
RMIISEL
nRST
MODE[0:2]
SMI
PHYAD0
188
Содержание IN-Command AVR-X4000
Страница 8: ...Personal notes 8...
Страница 19: ...Personal notes 19...
Страница 64: ...Personal notes Personal notes 64...
Страница 110: ...Personal notes 110...
Страница 164: ...Personal notes Personal notes 164...
Страница 170: ...R5F3650KNFB DIGITAL IC231 170...
Страница 176: ...W9864G6JH 6 DIGITAL IC409 W9864G2IH Publication Release Date Aug 28 2009 4 Revision A03 4 PIN CONFIGURATION 176...
Страница 179: ...MX25L1606EM2I 12G DIGITAL IC410 IC423 MX25L1606EM2I 12G Block Diagram 8 PIN SOP 200mil 150mil BLOCK DIAGRAM 179...
Страница 181: ...AK5358BET DIGITAL IC451 AK5358BET Pin Function 181...
Страница 194: ...2 FL DISPLAY FLD 17 BT 40GINK FRONT FL601 PIN CONNECTION GRID ASSIGNMENT Y2 q 194...
Страница 195: ...ANODE CONNECTION 195...