DA82562EM Intel, DA82562EM Datasheet - Page 81

• Manufacturer Part Number: DA82562EM
• Manufacturer: Intel

Specifications of DA82562EM

• Lead Free Status / Rohs Status: Not Compliant

Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
•
BYTE 10.
Table 43. Pre-amble Length
— Bit 4 - VLAN ARP (82558 B-step) or VLAN TCO (82559). This bit is available only in
— Bits 7:6 - Loopback. This bit defines the type of loopback.
— Bits 5:4 - Pre-amble Length. This bit selects the length of the pre-amble, not including the
— Bit 3 - No Source Address Insertion. This bit determines the source of the source address.
Default - 0 (disabled).
Recommended - 0.
the 82558 B-step and 82559. It should be set to 0 on 82557 and 82558 A-step devices.
VLAN ARP: For the 82558 B-step, this bit enables wake-up upon reception of ARP
frames with a dynamic presence of a VLAN header. This bit takes affect only if the ARP
wake-up enable bit is also set. This same functionality has been moved on the 82559 to
the extended wake-up packet command.
0 = VLAN header not supported.
1 = Dynamic VLAN header supported.
Default - 0 (off).
Recommended - 0.
VLAN TCO: On the 82559, this bit activates VLAN capability filtering of received TCO
packets at nominal D0 state. When this bit is clear, the 82559 implements receive TCO in
D0 for non-tagged TCO packets only. If this bit is set, the 82559 looks for both tagged and
non-tagged TCO packets. When the 82559 is in the power down state or the Force TCO
state, the 82559 looks for the VLAN type for recognition of tagged versus non-tagged
packets. In all other states, the 82559 does not look for the VLAN type for qualification.
0 = Only TCO packets without VLAN headers are supported.
1 = TCO packets with or without VLAN headers are supported.
Default - 0 (off).
Recommended - 0.
00 = Normal operation (no loopback).
01 - Internal loopback.
10 - Reserved.
11 - External loopback (loopback pin active).
Default - 00.
Recommended - 00.
SFD, according to table below.
Default setting - 10b (7 bytes).
Recommended - 10b.
0 = SA insertion (SA comes from internal device IA).
D5
0
0
1
1
D4
0
1
0
1
1 byte
3 bytes
7 bytes
15 bytes
Preamble Length
Host Software Interface
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