LAN89218AQ SMSC, LAN89218AQ Datasheet - Page 69

• 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

High Performance Single-Chip 10/100 Ethernet Controller for Automotive Applications
Datasheet
SMSC LAN89218
3.13.2
RX Packet Format
The RX status words can be read from the RX status FIFO port, while the RX data packets can be
read from the RX data FIFO. RX data packets are formatted in a specific manner before the host can
read them as shown in
status word from the RX status FIFO, to ascertain the data size and any error conditions.
Figure 3.28
appended to the data payload is treated just as an additional 4-bytes within the RX Data FIFO. The
RX checksum is enabled by setting the RXCOE_EN bit in the
Control
Checksum Offload Engine
Register. For more information on the RX checksum, refer to
shows the RX packet format when the RX checksum is enabled. The RX checksum data
Figure 3.28 RX Packet Format with RX Checksum
Host Read
Figure
Host Read
Order
Last
2nd
1st
Order
(RXCOE)".
Last
Figure 3.27 RX Packet Format
2nd
1st
3.27. It is assumed that the host has previously read the associated
DATASHEET
31
ofs + First Data DWORD
31
Optional offset DWORD0
Optional offset DWORDn
Optional Pad DWORDn
Optional Pad DWORD0
ofs + First Data DWORD
Checksum
Optional offset DWORDn
Optional offset DWORD0
Last Data DWORD
Optional Pad DWORD0
Optional Pad DWORDn
Last Data DWORD
RX
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0
0
COE_CR—Checksum Offload Engine
Section 3.6.1, "Receive
Revision 1.3 (02-23-10)