ksz8893mqlam Micrel Semiconductor, ksz8893mqlam Datasheet - Page 81
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ksz8893mqlam
Manufacturer Part Number
ksz8893mqlam
Description
Integrated 3-port 10/100 Managed Switch With Phys
Manufacturer
Micrel Semiconductor
Datasheet
1.KSZ8893MQLAM.pdf
(116 pages)
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Register 31 (0x1F): Port 1 Status 1 (continued)
Register 47 (0x2F): Port 2 Status 1 (continued)
Register 63 (0x3F): Port 3 Status 1 (continued)
Advanced Control Registers
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
2
1
0
Bit
7-6
5-4
3-2
1-0
December 2007
Name
Operation
Speed
Operation
Duplex
Far-end Fault
Name
DSCP[7:6]
DSCP[5:4]
DSCP[3:2]
DSCP[1:0]
R/W
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
Description
1 = link speed is 100Mbps
0 = link speed is 10Mbps
1 = link duplex is full
0 = link duplex is half
= 1, Far-end fault status detected
= 0, no Far-end fault status detected
Description
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 0x0C.
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.
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.
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.
81
Default
0
0
0
Note: Only port
1 supports fiber.
This bit is
applicable to
port 1 only.
Default
00
00
00
00
M9999-121007-1.5
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