LAN9303 Datasheet, PDF (158/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

13.2.4.4
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Switch 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 13.4, "Switch Fabric Control and Status Registers," on page 212 for details on the registers
indirectly accessible via this register.
BITS
DESCRIPTION
31:0 Switch CSR Data (CSR_DATA)
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 Read/Write (R_nW) bit in
the Switch Fabric CSR Interface Command Register (SWITCH_CSR_CMD).
If Read/Write (R_nW) is set, the data is from the switch fabric. If Read/Write
(R_nW) is cleared, the data is the value that was last written into this
register.
TYPE
R/W
DEFAULT
00000000h
Revision 1.3 (08-27-09)
158
DATASHEET
SMSC LAN9303/LAN9303i