LAN9312 datasheet(237/458 Pages) SMSC

Part #	LAN9312

Description	High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

PDF	458 Pages

Scroll/Zoom	100%

Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

SMSC LAN9312

237

Revision 1.2 (04-08-08)

DATASHEET

19:16

CSR Byte Enable (CSR_BE[3:0])

This field is a 4-bit byte enable used for selection of valid bytes during write

operations. Bytes which are not selected will not be written to the

corresponding Switch Engine CSR.

CSR_BE[3] corresponds to register data bits [31:24]

CSR_BE[2] corresponds to register data bits [23:16]

CSR_BE[1] corresponds to register data bits [15:8]

CSR_BE[0] corresponds to register data bits [7:0]

Typically all four byte enables should be set for auto increment and auto

decrement operations.

R/W

15:0

CSR Address (CSR_ADDR[15:0])

This field selects the 16-bit address of the Switch Fabric CSR that will be

accessed with a read or write operation. Refer to Table 14.12, “Indirectly

Accessible Switch Control and Status Registers,” on page 308 for a list of

Switch Fabric CSR addresses.

R/W

00h

BITS

DESCRIPTION

TYPE

DEFAULT

LAN9312 Datasheet(PDF) 237 Page - SMSC Corporation