DP83820BVUW National Semiconductor, DP83820BVUW Datasheet - Page 43

• Manufacturer Part Number: DP83820BVUW
• Description: IC INTERFACE CONTROLLER 208-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83820BVUW

• Controller Type: Ethernet Controller, MAC/BIU
• Interface: IEEE 802.3
• Voltage - Supply: 3.3V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83820BVUW

4.0 Register Set
4.2.3 MII/EEPROM Access Register
The MII/EEPROM Access Register provides an interface for software access to the serial management port of an
external MII device or NMC9306 style EEPROM. The default values given assume that the MDIO and EEDO lines have
pullup resistors to VDD.
31-7
bit
6
5
4
3
2
1
0
MDDIR
EECLK
EESEL
EEDO
MDIO
MDC
EEDI
tag
Offset: 0008h
(Continued)
Tag: MEAR
MII Management Clock
MII Management Direction
MII Management Data
EEPROM Chip Select
EEPROM Serial Clock
EEPROM Data Out
EEPROM Data In
description
Access: Read Write
unused
Read-Write. Controls the value of the MDC pin. When set, the MDC pin is
1, when clear the MDC pin is 0.
Read-Write. Controls the direction of MDIO pin. When set, MacPhyter3V
drives the current state of the MDIO bit onto the MDIO pin. When clear, the
MDIO bit reflects the current state of the MDIO pin.
Read-Write. Provides software access to the MDIO pin (see MDDIR).
Controls the value of the EESEL pin. When set, the EESEL pin is 1; when
clear the EESEL pin is 0. R/W
Controls the value of the EECLK pin. When set, the EECLK pin is 1; when
clear the EECLK pin is 0. R/W
Returns the current state of the EEDO pin. When set, the EEDO pin is 1;
when clear the EEDO pin is 0. RO
Controls the value of the EEDI pin. R/W
Size: 32 bits
43
usage
Hard Reset: 00000012h
Soft Reset: 00000012h
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