LAN9115_05 SMSC [SMSC Corporation], LAN9115_05 Datasheet - Page 58

• Manufacturer Part Number: LAN9115_05
• Description: Highly Efficient Single- Chip 10/100 Non-PCI Ethernet Controller
• Manufacturer: SMSC [SMSC Corporation]

Revision 1.1 (05-17-05)
3.14.1.1
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 LAN9115 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 3.17 Host Receive Routine Using Interrupts
Figure 3.18 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
58
Valid Status DWORD
RX Interrupt
Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
Not Last Packet
Not Last Packet
SMSC LAN9115
Datasheet