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KSZ8873MLLJ Datasheet(PDF) 66 Page - Micrel Semiconductor

Part No. KSZ8873MLLJ
Description  Integrated 3-Port 10/100 Managed Switch with PHYs
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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KSZ8873MLLJ Datasheet(HTML) 66 Page - Micrel Semiconductor

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Micrel, Inc.
KSZ8873MLLJ
September 2011
66
M9999-091911-1.8
Advanced Control Registers (Registers 96-198)
The IPv4/IPv6 TOS Priority Control Registers implement a fully decoded, 128-bit DSCP (Differentiated Services Code
Point) register set that is used to determine priority from the ToS (Type of Service) field in the IP header. The most
significant 6 bits of the ToS field are fully decoded into 64 possibilities, and the singular code that results is compared
against the corresponding bits in the DSCP register to determine the priority.
Register 96 (0x60): TOS Priority Control Register 0
Bit
Name
R/W
Description
Default
7-6
DSCP[7:6]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x03.
00
5-4
DSCP[5:4]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x02.
00
3-2
DSCP[3:2]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x01.
00
1-0
DSCP[1:0]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x00.
00
Register 97 (0x61): TOS Priority Control Register 1
Bit
Name
R/W
Description
Default
7-6
DSCP[15:14]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x07.
00
5-4
DSCP[13:12]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x06.
00
3-2
DSCP[11:10]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x05.
00
1-0
DSCP[9:8]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x04.
00
Register 98 (0x62): TOS Priority Control Register 2
Bit
Name
R/W
Description
Default
7-6
DSCP[23:22]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x0B.
00
5-4
DSCP[21:20]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x0A.
00
3-2
DSCP[19:18]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x09.
00
1-0
DSCP[17:16]
R/W
The value in this field is used as the frame’s priority when
bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value
is 0x08.
00


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