LAN9303-ABZJ SMSC, LAN9303-ABZJ Datasheet - Page 327

• Manufacturer Part Number: LAN9303-ABZJ
• Description: IC ETHER SW 3PORT 16BIT 56QFN
• Manufacturer: SMSC

Specifications of LAN9303-ABZJ

• Controller Type: Ethernet Switch Controller
• Interface: SMBus (2-Wire/I²C)
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 190mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 56-QFN
• Product: Ethernet Switches
• Standard Supported: Yes
• Data Rate: 10 Mbps/100 Mbps
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Supply Current (max): 0.19 A (Typ)
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• For Use With: 638-1095 - EVALUATION BOARD FOR LAN9303
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 638-1082

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
SMSC LAN9303/LAN9303i
13.4.4.11
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
13.4.4.10, "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
327
Size:
32 bits
Section
TYPE
R/W
RO
Revision 1.4 (07-07-10)
DEFAULT
000h
-