LAN9420-NU Standard Microsystems (SMSC), LAN9420-NU Datasheet - Page 93
LAN9420-NU
Manufacturer Part Number
LAN9420-NU
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9420-NU.pdf
(170 pages)
Specifications of LAN9420-NU
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
128
Lead Free Status / RoHS Status
Compliant
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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
-
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