LAN89218AQ SMSC, LAN89218AQ Datasheet - Page 64

• Manufacturer Part Number: LAN89218AQ
• Description: Ethernet ICs High Perform Chip 10/100 NonPCI Cntrl
• Manufacturer: SMSC

Specifications of LAN89218AQ

• Ethernet Connection Type: 10BASE-T, 100BASE-TX
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Standard Supported: IEEE802.3, IEEE802.3u
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 85 C
• Package / Case: TQFP-100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 1.3 (02-23-10)
3.12.6.3
TX Example 3
In this example a single, 111-Byte Ethernet packet will be transmitted with a TX checksum. This packet
is divided into four buffers. The four buffers are as follows:
Buffer 0:
Buffer 1:
Buffer 2:
Buffer 3:
Figure 3.22, "TX Example 1"
how data is passed to the TX data FIFO.
Note: In order to perform a TX checksum calculation on the associated packet, bit 14 (CK) of the TX
4-Byte “Data Start Offset”
4-Byte Checksum Preamble
16-Byte “Buffer End Alignment”
7-Byte “Data Start Offset”
79-Bytes of payload data
16-Byte “Buffer End Alignment”
0-Byte “Data Start Offset”
15-Bytes of payload data
16-Byte “Buffer End Alignment”
10-Byte “Data Start Offset”
17-Bytes of payload data
16-Byte “Buffer End Alignment”
Command ‘B’ must be set in conjunction with bit 13 (FS) of TX Command ‘A’ and bit 16
(TXCOE_EN) of the COE_CR register. For more information, refer to
Checksum Offload Engine
High Performance Single-Chip 10/100 Ethernet Controller for Automotive Applications
illustrates the TX command structure for this example, and also shows
(TXCOE)".
DATASHEET
64
Section 3.6.2, "Transmit
SMSC LAN89218
Datasheet