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LAN9312 Fiches technique(PDF) 68 Page - SMSC Corporation

No de pièce LAN9312
Description  High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
PDF  458 Pages
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Fabricant  SMSC [SMSC Corporation]
Site Internet  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN9312 Fiches technique(HTML) 68 Page - SMSC Corporation

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.2 (04-08-08)
68
SMSC LAN9312
DATASHEET
The transmit queue priority is based on the packet type and device configuration as shown in
Figure 6.5. Refer to Section 14.5.3.16, "Switch Engine Global Ingress Configuration Register
(SWE_GLOBAL_INGRSS_CFG)," on page 384 for definitions of the configuration bits.
Figure 6.5 Switch Engine Transmit Queue Calculation
Queue =
ALR Priority
DA Highest
Priority
ALR Static Bit
Y
Y
Resolved Priority =
Priority Regen[VLAN
Priority]
N
Packet is IPv 4/v6
& Use IP
Resolved Priority =
IP Precedence
Y
Use Precedence
Y
N
Resolved Priority =
DIFFSERV[TC]
N
N
Y
VLAN Enable &
Packet is
Tagged
Y
N
N
Resolved Priority =
Default Priority[Source
Port]
wait for ALR result
Queue =
Traffic Class[Resolved Priority]
Packet is IPv 4
Resolved Priority =
DIFFSERV[TOS]
Y
N
Get Queue Done
VL Higher
Priority
VLAN Enable &
Packet is
Tagged
N
Y
Get Queue
Packet from Host
N
Y



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