參數(shù)資料
型號(hào)： KSZ8873MLL
廠(chǎng)商： Micrel Inc
文件頁(yè)數(shù)： 67/115頁(yè)
文件大?。?/td> 0K
描述： IC ETHERNET SWITCH 3PORT 64-LQFP
產(chǎn)品培訓(xùn)模塊： KSZ8873 Ethernet Switches
特色產(chǎn)品： KSZ8873 Ethernet Switch Controller
標(biāo)準(zhǔn)包裝： 160
控制器類(lèi)型： 以太網(wǎng)開(kāi)關(guān)控制器
接口： MII
電源電壓： 1.8V，2.5V，3.3V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 64-LQFP
供應(yīng)商設(shè)備封裝： 64-LQFP（10x10）
包裝： 托盤(pán)
產(chǎn)品目錄頁(yè)面： 1081 (CN2011-ZH PDF)
其它名稱(chēng)： 576-3459
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Micrel, Inc.
KSZ8873MLL/FLL/RLL
September 20, 2013
55
Revision 1.6
Register 3 (0x03): Global Control 1
Bit
Name
R/W
Description
Default
7
Pass All Frames
R/W
=1, Switch all packets including bad ones. Used solely for debugging
purposes. Works in conjunction with sniffer mode only.
0
6
Port 3 Tail Tag
Mode Enable
R/W
=1, Enable port 3 tail tag mode.
=0, Disable.
0
5
IEEE 802.3x Transmit
Direction Flow
Control Enable
R/W
=1, Will enable transmit direction flow control feature.
=0, Will not enable transmit direction flow control feature. Switch will not
generate any flow control (PAUSE) frame.
1
4
IEEE 802.3x Receive
Direction Flow
Control Enable
R/W
=1, Will enable receive direction flow control feature.
=0, Will not enable receive direction flow control feature. Switch will not react
to any flow control (PAUSE) frame it receives.
1
3
Frame Length
Field Check
R/W
=1, Will check frame length field in the IEEE packets. If the actual length
does not match, the packet will be dropped (for Length/Type field < 1500).
=0, Not check
0
2
Aging Enable
R/W
=1, Enable age function in the chip
=0, Disable age function in the chip
1
Fast Age Enable
R/W
=1, Turn on fast age (800us)
0
Aggressive
Back-Off Enable
R/W
=1, Enable more aggressive back off algorithm in half duplex mode to
enhance performance. This is not an IEEE standard.
0
Register 4 (0x04): Global Control 2
Bit
Name
R/W
Description
Default
7
Unicast
Port-VLAN
Mismatch Discard
R/W
This feature is used with port-VLAN (described in reg. 17, reg. 33, …)
=1, All packets can not cross VLAN boundary
=0, Unicast packets (excluding unkown/multicast/ broadcast) can cross VLAN
boundary
Note: Port mirroring is not supported if this bit is set to “0”.
1
6
Multicast Storm
Protection Disable
R/W
=1, “Broadcast Storm Protection” does not include multicast packets. Only DA =
FF-FF-FF-FF-FF-FF packets will be regulated.
=0, “Broadcast Storm Protection” includes
DA = FF-FF-FF-FF-FF-FF and
DA[40] = 1 packets.
1
5
Back Pressure
Mode
R/W
=1, Carrier sense based backpressure is selected
=0, Collision based backpressure is selected
1
4
Flow Control and
Back Pressure Fair
Mode
R/W
=1, Fair mode is selected. In this mode, if a flow control port and a non-flow
control port talk to the same destination port, packets from the non-flow control
port may be dropped. This is to prevent the flow control port from being flow
controlled for an extended period of time.
=0, In this mode, if a flow control port and a non-flow control port talk to the same
destination port, the flow control port will be flow controlled. This may not be “fair”
to the flow control port.
1
3
No Excessive
Collision Drop
R/W
=1, The switch will not drop packets when 16 or more collisions occur.
=0, The switch will drop packets when 16 or more collisions occur.
0
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