LAN9312-NU Standard Microsystems (SMSC), LAN9312-NU Datasheet - Page 420

• Manufacturer Part Number: LAN9312-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9312-NU

• Number Of Primary Switch Ports: 2
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: No
• Phy/transceiver Interface: MII
• Power Supply Type: Analog
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Compliant

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
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
DATASHEET
420
Size:
32 bits
Section
TYPE
R/W
RO
SMSC LAN9312
DEFAULT
000h
Datasheet
-