LAN9303 Datasheet, PDF (276/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

13.4.3.5
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Switch Engine ALR Read Data 1 Register (SWE_ALR_RD_DAT_1)
Register #:
1806h
Size:
32 bits
This register is used in conjunction with the Switch Engine ALR Read Data 0 Register
(SWE_ALR_RD_DAT_0) to read the ALR table. It contains the last 32 bits of the ALR entry and is
loaded via the Get First Entry or Get Next Entry commands in the Switch Engine ALR Command
Register (SWE_ALR_CMD). This register is only valid when either of the Valid or End of Table bits are
set.
BITS
DESCRIPTION
31:27 RESERVED
26 Valid
This bit is cleared when the Get First Entry or Get Next Entry bits of the
Switch Engine ALR Command Register (SWE_ALR_CMD) are written. This
bit is set when a valid entry is found in the ALR table. This bit stays cleared
when the top of the ALR table is reached without finding an entry.
25 End of Table
This bit indicates that the end of the ALR table has been reached and further
Get Next Entry commands are not required.
Note: The Valid bit may or may not be set when the end of the table is
reached.
24 Static
Indicates that this entry will not be removed by the aging process. When this
bit is cleared, this entry will be automatically removed after 5 to 10 minutes
of inactivity. Inactivity is defined as no packets being received with a source
address that matches this MAC address.
23 Filter
When set, indicates that packets with a destination address that matches
this MAC address will be filtered.
22 Priority Enable
Indicates whether or not the usage of the Priority field is enabled for this
MAC address entry.
21:19
Priority
These bits specify the priority that is used for packets with a destination
address that matches this MAC address. This priority is only used if both the
Priority Enable bit of this register and the DA Highest Priority bit in the
Switch Engine Global Ingress Configuration Register
(SWE_GLOBAL_INGRSS_CFG) are set.
TYPE
RO
RO
RO
RO
RO
RO
RO
DEFAULT
-
0b
0b
0b
0b
0b
000b
Revision 1.3 (08-27-09)
276
DATASHEET
SMSC LAN9303/LAN9303i