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LAN9303 Datasheet(PDF) 72 Page - SMSC Corporation

Part # LAN9303
Description  Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
PDF  366 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN9303 Datasheet(HTML) 72 Page - SMSC Corporation

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Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Revision 1.3 (08-27-09)
72
SMSC LAN9303/LAN9303i
DATASHEET
The transmit queue priority is based on the packet type and device configuration as shown in
Figure 6.5. Refer to Section 13.4.3.16, "Switch Engine Global Ingress Configuration Register
(SWE_GLOBAL_INGRSS_CFG)," on page 289 for definitions of the configuration bits.
Figure 6.5 Switch Engine Transmit Queue Calculation
DA Highest
Priority
ALR Priority
Enable Bit
Y
Y
Resolved Priority =
Priority Regen[VLAN
Priority]
N
Packet is IPv4/v6
& Use IP
Resolved Priority =
IP Precedence
Y
Use Precedence
Y
N
Resolved Priority =
DIFFSERV[TC]
N
N
Y
Use Tag &
Packet is
Tagged
Y
N
N
Resolved Priority =
Default Priority[Source
Port]
wait for ALR result
Queue =
Traffic Class[Resolved Priority]
Packet is IPv4
Resolved Priority =
DIFFSERV[TOS]
Y
N
Get Queue Done
VL Higher
Priority
Use Tag &
Packet is
Tagged
N
Y
Get Queue
Packet from Host
N
Y
Resolved Priority =
ALR Priority



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