LAN9211 datasheet(61/147 Pages) SMSC

Part #	LAN9211

Description	High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

PDF	147 Pages

Scroll/Zoom	100%

Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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61 / 147 page

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

SMSC LAN9211

Revision 2.9 (03-01-12)

DATASHEET

3.13.1

RX Slave PIO Operation

Using PIO mode, the host can either implement a polling or interrupt scheme to empty the received

packet out of the RX data FIFO. The host will remain in the idle state until it receives an indication

(interrupt or polling) that data is available in the RX data FIFO. The host will then read the RX status

FIFO to get the packet status, which will contain the packet length and any other status information.

The host should perform the proper number of reads, as indicated by the packet length plus the start

offset and the amount of optional padding added to the end of the frame, from the RX data FIFO.

Figure 3.24 Host Receive Routine Using Interrupts

Figure 3.25 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

LAN9211 Datasheet(PDF) 61 Page - SMSC Corporation