Csr address (csr_addr[15:0]), Datasheet – SMSC LAN9312 User Manual
Page 237
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
237
Revision 1.4 (08-19-08)
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
0h
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
Accessible Switch Control and Status Registers,” on page 307
for a list of
Switch Fabric CSR addresses.
R/W
00h
BITS
DESCRIPTION
TYPE
DEFAULT