参数资料
型号: KSZ8995FQI
厂商: Micrel Inc
文件页数: 49/89页
文件大小: 0K
描述: IC SWITCH 10/100 5PORT 128-PQFP
标准包装: 66
系列: *
产品目录页面: 1081 (CN2011-ZH PDF)
配用: 576-3872-ND - BOARD EVALUATION FOR KSZ8995FQ
其它名称: 576-3300
Micrel, Inc.
KS8995MA/FQ
October 2011
53
M9999-102611-3.0
Port Registers
The following registers are used to enable features that are assigned on a per port basis. The register bit
assignments are the same for all ports, but the address for each port is different, as indicated.
Address
Name
Description
Mode
Default
Register 16 (0x10): Port 1 Control 0
Register 32 (0x20): Port 2 Control 0
Register 48 (0x30): Port 3 Control 0
Register 64 (0x40): Port 4 Control 0
Register 80 (0x50): Port 5 Control 0
7
Broadcast Storm Protection
Enable
1, enable broadcast storm protection for ingress packets on
the port.
0, disable broadcast storm protection.
R/W
0
6
DiffServ Priority Classification
Enable
1, enable DiffServ priority classification for ingress packets on
port.
0, disable DiffServ function.
R/W
0
5
802.1p Priority Classification
Enable
1, enable 802.1p priority classification for ingress packets on
port.
0, disable 802.1p.
R/W
0
4
Port-Based Priority Classification
Enable
1, ingress packets on the port will be classified as high
priority if “DiffServ” or “802.1p” classification is not enabled or
fails to classify.
0, ingress packets on port will be classified as low priority if
“DiffServ” or “802.1p” classification is not enabled or fails to
classify.
Note: “DiffServ”, “802.1p” and port priority can be enabled at
the same time. The OR’ed result of 802.1p and DSCP
overwrites the port priority.
R/W
0
3
Reserved
R/W
0
2
Tag insertion
1, when packets are output on the port, the switch will add
802.1q tags to packets without 802.1q tags when received.
The switch will not add tags to packets already tagged. The
tag inserted is the ingress port’s “port VID.”
0, disable tag insertion.
R/W
0
1
Tag Removal
1, when packets are output on the port, the switch will
remove 802.1q tags from packets with 802.1q tags when
received. The switch will not modify packets received without
tags.
0, disable tag removal.
R/W
0
Priority Enable
1, the port output queue is split into high and low priority
queues.
0, single output queue on the port. There is no priority
differentiation even though packets are classified into high or
low priority.
R/W
0
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