LAN9420I-NU Standard Microsystems (SMSC), LAN9420I-NU Datasheet - Page 93

• Manufacturer Part Number: LAN9420I-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9420I-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i
BITS
10:8
7:5
4:3
2:0
[22]
0
0
0
0
1
1
1
1
GPIO Direction 0-2 (GPDIRn)
When set, enables the corresponding GPIO as an output. When cleared the
GPIO is enabled as an input. Bits are assigned as follows:
GPIO0 – bit 8
GPIO1 – bit 9
GPIO2 – bit 10
RESERVED
GPO Data 3-4 (GPODn)
The value written is reflected on GPOn. Bits are assigned as follows:
GPO3 – bit 3
GPO4 – bit 4
GPIO Data 0-2 (GPIODn)
When enabled as an output, the value written is reflected on GPIOn. When
read, GPIOn reflects the current state of the corresponding GPIO pin. Bits
are assigned as follows:
GPIO0 – bit 0
GPIO1 – bit 1
GPIO2 – bit 2
Note 4.2
[21]
0
0
1
1
0
0
1
1
Default value is dependent on the state of the GPIO pin.
[20]
0
1
0
1
0
1
0
1
Table 4.3 EEPROM Enable Bit Definitions
DESCRIPTION
EEDIO FUNCTION
DATASHEET
TX_CLK
EEDIO
TX_EN
TX_EN
GPO3
GPO3
93
Reserved
Reserved
EECLK FUNCTION
TYPE
RX_CLK
R/W
R/W
R/W
EECLK
RX_DV
RX_DV
RO
GPO4
GPO4
Revision 1.4 (12-17-08)
DEFAULT
Note 4.2
000b
00b
-