202
LAN8720A (HDMI:IC322)
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720A/LAN8720Ai
9
Revision 1.3 (04-20-11)
DATASHEET
Chapter 2 Pin Description and Configuration
Note:
When a lower case “n” is used at the beginning of the signal name, it indicates that the signal
is active low. For example, nRST indicates that the reset signal is active low.
Note:
The buffer type for each signal is indicated in the BUFFER TYPE column. A description of the
buffer types is provided in
Section 2.2
.
Figure 2.1 24-QFN Pin Assignments (TOP VIEW)
VSS
NOTE:
Exposed pad (VSS) on bottom of package must be connected to ground
SMSC
LAN8720A/LAN8720Ai
24 PIN QFN
(TOP VIEW)
MDIO
1
2
3
4
5
6
7
8
9
10
11
12
18
17
16
15
14
13
24
23
22
21
20
19
VDD
CR
XTAL1/
CL
KI
N
XT
AL2
LED1/
REGOFF
LED2/
nINTSEL
VDD2A
TXD1
TXD0
TXEN
nRST
nI
NT
/RE
FCLKO
MDC
VDD1A
TXN
TXP
RXN
RXP
RBIAS
CRS_DV/MODE2
RXER/PHYAD0
VDDIO
RXD0/MODE0
RXD1/MODE1
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