LAN9218I_07 SMSC [SMSC Corporation], LAN9218I_07 Datasheet - Page 53

• Manufacturer Part Number: LAN9218I_07
• Description: High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
• Manufacturer: SMSC [SMSC Corporation]

High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
Datasheet
SMSC
3.12.1.1
LAN9218i
Receive Data FIFO Fast Forward
The RX data path implements an automatic data discard function. Using the RX data FIFO Fast
Forward bit (RX_FFWD) in the RX_DP_CTRL register, the host can instruct the LAN9218i to skip the
packet at the head of the RX data FIFO. The RX data FIFO pointers are automatically incremented to
the beginning of the next RX packet.
Figure 3.15 Host Receive Routine Using Interrupts
Figure 3.16 Host Receive Routine with Polling
Last Packet
Last Packet
DATASHEET
RX_FIFO_
Read RX
Read RX
DWORD
Read RX
Read RX
DWORD
Packet
Packet
Status
Status
Read
Idle
init
INf
init
53
Valid Status DWORD
RX Interrupt
Not Last Packet
Not Last Packet
Revision 1.8 (06-06-07)