EVB9221-MINI SMSC, EVB9221-MINI Datasheet - Page 117
![EVALUATION BOARD LAN9221-ABZJ](/photos/9/10/91030/evb9221-mini_sml.jpg)
EVB9221-MINI
Manufacturer Part Number
EVB9221-MINI
Description
EVALUATION BOARD LAN9221-ABZJ
Manufacturer
SMSC
Datasheet
1.LAN9221-ABZJ.pdf
(152 pages)
Specifications of EVB9221-MINI
Main Purpose
Interface, Ethernet Controller (PHY and MAC)
Embedded
No
Utilized Ic / Part
LAN9221
Primary Attributes
1 Port, 100BASE-TX/10BASE-T
Secondary Attributes
16-Bit, HP Auto-MDIX, Full and Half Duplex Support, 32-Bit CRC
Processor To Be Evaluated
LAN9221
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
638-1074
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High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
SMSC LAN9221/LAN9221i
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
117
DESCRIPTION
Attribute:
Size:
R/W
32 bits
Revision 2.7 (03-15-10)
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