LAN9312 datasheet(240/458 Pages) SMSC

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

Datasheet

Revision 1.2 (04-08-08)

240

SMSC LAN9312

DATASHEET

14.2.6.8

Switch Fabric CSR Interface Direct Data Register (SWITCH_CSR_DIRECT_DATA)

This write-only register set is used to perform directly addressed write operations to the Switch Fabric

CSR’s. Using this set of registers, writes can be directly addressed to select Switch Fabric registers,

as specified in Table 14.3.

Writes within the Switch Fabric CSR Interface Direct Data Register (SWITCH_CSR_DIRECT_DATA)

address range automatically set the appropriate address, set the four byte enable bits, clear the R/nW

bit and set the Busy bit in the Switch Fabric CSR Interface Command Register (SWITCH_CSR_CMD).

The completion of the write cycle is indicated when the Busy bit is cleared. The address that is set in

the Switch Fabric CSR Interface Command Register (SWITCH_CSR_CMD) is mapped via Table 14.3.

For more information on this method of writing to the Switch Fabric CSR’s, refer to Section 6.2.3, "Flow

Control Enable Logic," on page 58.

Note:

This set of registers is for write operations only. Reads can be performed via the Switch Fabric

CSR Interface Command Register (SWITCH_CSR_CMD) and Switch Fabric CSR Interface

Data Register (SWITCH_CSR_DATA) registers only.

Offset:

200h - 2DCh

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:0

Switch CSR Data (CSR_DATA)

This field contains the value to be written to the corresponding Switch Fabric

00000000h

Table 14.3 Switch Fabric CSR to SWITCH_CSR_DIRECT_DATA Address Range Map

SWITCH FABRIC CSR

SWITCH_CSR_DIRECT_DATA

ADDRESS

General Switch CSRs

SW_RESET

0001h

200h

SW_IMR

0004h

204h

Switch Port 0 CSRs

MAC_RX_CFG_MII

0401h

208h

MAC_TX_CFG_MII

0440h

20Ch

MAC_TX_FC_SETTINGS_MII

0441h

210h

MAC_IMR_MII

0480h

214h

Switch Port 1 CSRs

MAC_RX_CFG_1

0801h

218h

MAC_TX_CFG_1

0840h

21Ch

MAC_TX_FC_SETTINGS_1

0841h

220h

MAC_IMR_1

0880h

224h

Switch Port 2 CSRs

MAC_RX_CFG_2

0C01h

228h

LAN9312 Datasheet(PDF) 240 Page - SMSC Corporation

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