Datasheet

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
Revision 2.9 (03-01-12) 20 SMSC LAN9220
DATASHEET
Core Voltage
Decoupling
VDD18CORE P 2 +1.8 V from internal core regulator. Both pins
must be connected together externally. Each
pin requires a 0.01uF decoupling capacitor. In
addition, pin 2 requires a bulk 4.7uF capacitor
(<2 Ohm ESR) in parallel. These pins must not
be used to supply power to other external
devices.
Table 2.5 56-QFN Package Pin Assignments
PIN
NUM PIN NAME
PIN
NUM PIN NAME
PIN
NUM PIN NAME
PIN
NUM PIN NAME
1 VDD33REG 15 nRD 29 D6 43 IRQ
2 VDD18CORE 16 nWR 30 VDDVARIO 44 TPO-
3 GPIO0/nLED1 17 nCS 31 D5 45 TPO+
4 GPIO1/nLED2 18 VDDVARIO 32 D4 46 VDD33A
5 GPIO2/nLED3 19 D15 33 D3 47 TPI-
6 A7 20 D14 34 D2 48 TPI+
7 A6 21 D13 35 D1 49 VDD33A
8 A5 22 D12 36 D0 50 EXRES
9 A4 23 D11 37 VDD18CORE 51 VDD33A
10 A3 24 VDDVARIO 38 EEDIO/GPO3 52 AMDIX_EN
11 A2 25 D10 39 EECS 53 VDD18A
12 A1 26 D9 40 EECLK/GPO4 54 XTAL2
13 FIFO_SEL 27 D8 41 PME 55 XTAL1/CLKIN
14 TEST 28 D7 42 nRESET 56 VDDVARIO
EXPOSED PAD
MUST BE CONNECTED TO VSS
Table 2.4 System and Power Signals (continued)
NAME SYMBOL
BUFFER
TYPE
NUM
PINS DESCRIPTION