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

Datasheet

14.2.6.4Switch Fabric CSR Interface Data Register (SWITCH_CSR_DATA)

Offset:

1ACh

Size:

32 bits

This read/write register is used in conjunction with the Switch Fabric CSR Interface Command Register (SWITCH_CSR_CMD) to perform read and write operations with the Switch Fabric CSR’s. Refer to Section 14.5, "Switch Fabric Control and Status Registers," on page 307 for details on the registers indirectly accessible via this register.

BITS

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:0

Switch CSR Data (CSR_DATA)

R/W

00000000h

 

This field contains the value read from or written to the Switch Fabric CSR.

 

 

 

The Switch Fabric CSR is selected via the CSR Address (CSR_ADDR[15:0])

 

 

 

bits of the Switch Fabric CSR Interface Command Register

 

 

 

(SWITCH_CSR_CMD).

 

 

 

Upon a read, the value returned depends on the R/nW bit in the Switch

 

 

 

Fabric CSR Interface Command Register (SWITCH_CSR_CMD). If R/nW is

 

 

 

set, the data is from the switch fabric. If R/nW is cleared, the data is the

 

 

 

value that was last written into this register.

 

 

 

 

 

 

SMSC LAN9312

235

Revision 1.4 (08-19-08)

 

DATASHEET