參數資料
型號: KSZ8842-PMBL AM
廠商: Micrel Inc
文件頁數: 69/119頁
文件大?。?/td> 0K
描述: IC ETHERNET SW 2PORT 100-LFBGA
標準包裝: 260
控制器類型: 以太網開關控制器
接口: PCI
電源電壓: 3.1 V ~ 3.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-LFBGA
供應商設備封裝: 100-LFBGA
包裝: 托盤
產品目錄頁面: 1081 (CN2011-ZH PDF)
配用: 576-1636-ND - BOARD EVALUATION KSZ8842-PMQL
其它名稱: 576-3348
Micrel, Inc.
KSZ8842-PMQL/PMBL
October 2007
53
M9999-100207-1.5
Switch Global Control Register 1 (Offset 0x0402): SGCR1
This register contains the global control for the switch function.
Bit
Default
R/Write
Description
15
0
RW
Pass all frames
1 = switch all packets including bad ones. Used solely for debugging
purposes. Works in conjunction with Sniffer mode only.
14
0
RW
Reserved.
For factory test purposes only. Always write 0.
13
1
RW
IEEE 802.3x Transmit direction flow control enable
1 = will enable transmit direction flow control feature.
0 = will not enable transmit direction flow control feature. Switch will not
generate any flow control packets.
12
1
RW
IEEE 802.3x Receive direction flow control enable
1 = will enable receive direction flow control feature.
0 = will not enable receive direction flow control feature. Switch will not
react to any received flow control packets.
11
1
RW
Frame Length field check
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).
10
1
RW
Aging enable
1 = enable age function in the chip
0 = disable age function in the chip
9
0
RW
Fast age enable
1 = turn on fast age (800s)
8
0
RW
Aggressive back off enable
1 = enable more aggressive back off algorithm in half duplex mode to
enhance performance. This is not an IEEE standard.
6 – 4
0x4
RW
Reserved
3
0x0
RW
Reserved
3
1
RW
Pass flow control packet
1 = switch will not filter 802.1x “flow control” packets.
2
1
RW
Reserved
1
0
RW
Reserved
0
RW
Link change age
1 = link change from “l(fā)ink” to “no link” will cause fast aging (<800s) to
age address table faster. After an age cycle is complete, the age logic will
return to normal (300 + 75 seconds).
Note: If any port is unplugged, all addresses will be automatically aged
out.
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