LAN9215-MT-E2 datasheet(56/134 Pages) SMSC

Part #	LAN9215-MT-E2

Description	Highly Efficient 10/100 Ethernet Controller with HP Auto-MDIX

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Manufacturer	SMSC [SMSC Corporation]

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Highly Efficient Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX

Datasheet

Revision 1.5 (07-18-06)

56

SMSC LAN9215

DATASHEET

3.15.1.1

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 LAN9215 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 3.16 Host Receive Routine Using Interrupts

Figure 3.17 Host Receive Routine with Polling

Not Last Packet

Idle

Read RX

Status

DWORD

init

Read RX

Packet

Last Packet

RX Interrupt

Read

RX_FIFO_

INf

Read RX

Status

DWORD

init

Read RX

Packet

Last Packet

Not Last Packet

Valid Status DWORD

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LAN9215-MT-E2 Datasheet(PDF) 56 Page - SMSC Corporation

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