LAN9221_12 Datasheet, PDF (56/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
3.12.6 Transmit Examples
3.12.6.1
TX Example 1
In this example a single, 111-Byte Ethernet packet will be transmitted. This packet is divided into three
buffers. The three buffers are as follows:
Buffer 0:
„ 7-Byte “Data Start Offset”
„ 79-Bytes of payload data
„ 16-Byte “Buffer End Alignment”
Buffer 1:
„ 0-Byte “Data Start Offset”
„ 15-Bytes of payload data
„ 16-Byte “Buffer End Alignment”
Buffer 2:
„ 10-Byte “Data Start Offset”
„ 17-Bytes of payload data
„ 16-Byte “Buffer End Alignment”
Revision 2.9 (03-01-12)
56
DATASHEET
SMSC LAN9221/LAN9221i