SMSC LAN9311 Manual De Usuario
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
423
Revision 1.4 (08-19-08)
DATASHEET
14.5.4.11
Buffer Manager Random Discard Table Write Data Register (BM_RNDM_DSCRD_TBL_WDATA)
This register is used to write the Random Discard Weight table.
Note:
The Random Discard Weight table is not initialized upon reset or power-up. If a random discard
is enabled, the full table should be initialized by the host.
is enabled, the full table should be initialized by the host.
Register #:
1C0Ah
Size:
32 bits
BITS
DESCRIPTION
TYPE
DEFAULT
31:10
RESERVED
RO
-
9:0
Drop Probability
These bits specify the discard probability of a packet that has been colored
Yellow by the ingress metering. The probability is given in 1/1024’s. For
example, a setting of 1 is one in 1024, or approximately 0.1%. A setting of
all ones (1023) is 1023 in 1024, or approximately 99.9%.
These bits specify the discard probability of a packet that has been colored
Yellow by the ingress metering. The probability is given in 1/1024’s. For
example, a setting of 1 is one in 1024, or approximately 0.1%. A setting of
all ones (1023) is 1023 in 1024, or approximately 99.9%.
There are a total of 16 probability entries. Each entry corresponds to a range
of the number of buffers used by the ingress port, as specified in
of the number of buffers used by the ingress port, as specified in
R/W
000h