DP83820BVUW National Semiconductor, DP83820BVUW Datasheet - Page 68

• 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
4.2.35 VLAN/IP Transmit Control Register
This register allows enabling of the various VLAN tag handling features and IP checksum offload features.
4.2.36 VLAN Data Register
This register contains data for VLAN tag insertion and detection.
4.2.37 Clockrun Control/Status Register
31-16
31-16
14-9
31-4
15-0
7-1
bit
15
bit
bit
8
0
3
2
1
0
CLKRUN_EN CLKRUN Enable When set to 1, this bit enables the CLKRUN logic and allows the assertion of the
PMESTS
PPCHK
VTYPE
PMEEN
GCHK
VPPTI
VGTI
VTCI
tag
tag
tag
Offset: 00C0h
Offset: 00C4h
Offset: 00CCh
Per-Packet
Checksum
Generation
Global Checksum
Generation
VLAN Per-Packet
Tag Insertion
VLAN Global Tag
Insertion
VLAN Tag Control
Information Field
VLAN Type Field
(Continued)
PME Status
PME Enable
Tag: VTCR
Tag: VDR
Tag: CCSR
description
description
description
unused
Enables IP/TCP/UDP Checksum generation on a per-packet basis. Uses individual
enable controls from the EXTSTS field of the packet descriptor.
Enables IP/TCP/UDP Checksum generation on all transmit packets.
Insert VLAN tag in on a per-packet basis. Uses the VLAN Data Register VLAN type field
for the VLAN type. Uses the user_priority, CFI and VLAN ID fields from the EXTSTS field
of the packet descriptor.
Insert VLAN tag in all transmit packets. Uses the VLAN Data Register data for the 32-bit
VLAN tag to be inserted.
This field is the 2-octet VLAN TCI field. It is used by the transmitter during Global Tag
Insertion. It contains the VLAN user_priority, CFI and VID (VLAN Identifier) fields. It is not
used by the receiver.
This field is the 2-octet VLAN type field. By default this contains the 802.1QTag Type of
81-00. In order to represent the order the bytes will be shifted on the wire, it actually
contains a value of 0081h. This field is used by the transmitter for Global Tag Insertion
and by the receiver for Tag detection.
unused (reads return 0)
Sticky bit which represents the state of the PME/CLKRUN logic, regardless of the state of
the PMEEN bit. Mirrored from PCI configuration register PMCSR. Writing a 1 to this bit
clears it.
unused (reads return 0)
When set to 1, this bit enabled the assertion of the PMEN pin. When 0, the PMEN pin is
forced to be inactive. This value can be loaded from the EEPROM. Mirrored from PCI
configuration register PMCSR.
unused (reads return 0)
CLKRUN_N pin. When 0, the CLKRUN function is disabled.
Access: Read Write
Access: Read Write
Access: Read Write
Size: 32 bits
Size: 32 bits
Size: 32 bits
68
usage
usage
usage
Hard Reset: 00000000h
Hard Reset: 00000081h
Hard Reset: 00000000h
Soft Reset: 00000000h
Soft Reset: 00000081h
Soft Reset: 00000000h
www.national.com