lan9210 Standard Microsystems Corp., lan9210 Datasheet - Page 115
lan9210
Manufacturer Part Number
lan9210
Description
Lan9210 Small Form Factor Single-chip Ethernet Controller With Hp Auto-mdix Support
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9210.pdf
(146 pages)
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Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
Datasheet
SMSC LAN9210
5.4.13
31-17
BITS
15-2
16
1
0
Reserved
TX Checksum Offload Engine Enable (TXCOE_EN). This bit enables/disables the Transmit COE.
This bit may only be changed if the TX data path is disabled.
0: The TXCOE is bypassed
1: The TXCOE is enabled
Reserved
RX Checksum Offload Engine Mode (RXCOE_MODE) This register indicates whether the RXCOE
will check for VLAN tags or a SNAP header prior to beginning its checksum calculation. In its default
mode, the calculation will always begin 14 bytes into the frame.
The RXCOE_MODE may only be changed if the ESS RX path is disabled.
0: Begin checksum calculation after first 14 bytes of Ethernet Frame
1: Begin checksum calculation at start of L3 packet by adjusting for VLAN tags and/or SNAP header.
RX Checksum Offload Engine Enable (RXCOE_EN). This bit enables/disables the Receive COE.
This bit may only be changed if the RX data path is disabled.
0: The RXCOE is bypassed
1: The RXCOE is enabled
Note:
COE_CR—Checksum Offload Engine Control Register
This register controls the transmit and receive checksum offload engines.
Offset:
Default Value:
When the RXCOE is enabled, automatic pad stripping must be disabled (bit 8 (PADSTR) of
the
simultaneously.
MAC_CR—MAC Control
D
00000000h
DATASHEET
Register) and vice versa. These functions cannot be enabled
115
DESCRIPTION
Attribute:
Size:
R/W
32 bits
Revision 2.3 (08-06-08)
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