LAN9311-NU Standard Microsystems (SMSC), LAN9311-NU Datasheet - Page 422
LAN9311-NU
Manufacturer Part Number
LAN9311-NU
Description
TWO PORT 10/100 MANAGED ETHERNET SWITCH
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9311-NU.pdf
(460 pages)
Specifications of LAN9311-NU
Lead Free Status / RoHS Status
Compliant
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Revision 1.7 (06-29-10)
14.5.4.11
31:10
BITS
9:0
RESERVED
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%.
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
14.5.4.10, "Buffer Manager Random Discard Table Command Register
(BM_RNDM_DSCRD_TBL_CMD)".
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.
Register #:
1C0Ah
DESCRIPTION
DATASHEET
422
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Size:
32 bits
Section
TYPE
R/W
SMSC LAN9311/LAN9311i
RO
DEFAULT
000h
Datasheet
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