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DP83820 Datasheet(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83820
Description  10/100/1000 Mb/s PCI Ethernet Network Interface Controller
PDF  87 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83820 Datasheet(HTML) 21 Page - National Semiconductor (TI)

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3.0 Functional Description (Continued)
21
www.national.com
Table 3-6 Transmit
extsts Bit Definitions
Table 3-7 Receive
extsts Bit Definitions
bit
tag
description
usage
31-22
unused
21
UDPPKT
UDP Packet
Indicates packet contains a UDP header and enables
checksum generation for the UDP header if Checksumming
is enabled on a per-packet basis.
20
unused
19
TCPPKT
TCP Packet
Indicates packet contains a TCP header and enables
checksum generation for the TCP header if Checksumming
is enabled on a per-packet basis.
18
unused
17
IPPKT
IP Packet
Indicates packet contains a IP header and enables
checksum generation for the IP header if Checksumming is
enabled on a per-packet basis.
16
VPKT
VLAN Packet
Insert VLAN tag.
15-0
VTCI
VLAN Tag Control
Information
This is the VLAN TCI field to be inserted in the packet if the
VPKT bit is set.
bit
tag
description
usage
31-23
unused
22
UDPERR
UDP Checksum Error
Indicates a checksum error was detected in the UDP header.
21
UDPPKT
UDP Packet
Indicates an UDP header was detected for the packet.
20
TCPERR
TCP Checksum Error
Indicates a checksum error was detected in the TCP header.
19
TCPPKT
TCP Packet
Indicates an TCP header was detected for the packet.
18
IPERR
IP Checksum Error
Indicates a checksum error was detected in the IP header.
17
IPPKT
IP Packet
Indicates an IP header was detected for the packet.
16
VPKT
VLAN Packet
Packet contained a VLAN tag. This bit will be set if VLAN
packet detection is enabled and the packet contained the
correct type value.
15-0
VTCI
VLAN Tag Control
Information
This is the VLAN TCI field to be extracted from the packet. It
contains the user_priority, CFI, and VID fields.



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