Global Registers (Continued) Address Name Description Mode Default 3 Fram" />
參數(shù)資料
型號(hào): KSZ8895MQ
廠商: Micrel Inc
文件頁數(shù): 74/119頁
文件大?。?/td> 0K
描述: IC ETHERNET SW 5PORT 128-PQFP
標(biāo)準(zhǔn)包裝: 66
控制器類型: 以太網(wǎng)開關(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
安裝類型: 表面貼裝
封裝/外殼: 128-BFQFP
供應(yīng)商設(shè)備封裝: 128-PQFP(14x20)
包裝: 托盤
配用: 576-3871-ND - BOARD EVALUATION FOR KSZ8895MQ
其它名稱: 576-3753
Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Global Registers (Continued)
Address
Name
Description
Mode
Default
3
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 L/T <1500) .
R/W
0
2
Aging Enable
1, Enable age function in the chip.
0, Disable aging function.
R/W
1
Pin LED[5][2]
strap option.
PD(0): Aging
disable.
PU(1): Aging
enable (default).
Note: LED[5][2]
has internal pull
up.
1
Fast age Enable
1 = Turn on fast age (800s).
R/W
0
Aggressive Back Off
Enable
1 = Enable more aggressive back-off algorithm in half
duplex mode to enhance performance. This is not an
IEEE standard.
R/W
0
Pin PMRXD0
strap option.
PD(0): Disable
aggressive back
off (default).
PU(1):
Aggressive back
off.
Note: PMRXD0
has internal pull
down.
Register 4 (0x04): Global Control 2
7
Unicast Port-VLAN
Mismatch Discard
This feature is used for port VLAN (described in
Register 17, Register 33...).
1, all packets can not cross VLAN boundary.
0, unicast packets (excluding unknown/
multicast/broadcast) can cross VLAN boundary.
R/W
1
6
Multicast Storm
Protection Disable
1, “Broadcast Storm Protection” does not include
multicast packets. Only DA = FFFFFFFFFFFF packets
will be regulated.
0, “Broadcast Storm Protection” includes
DA = FFFFFFFFFFFF and DA[40] = 1 packet.
R/W
1
5
Back Pressure Mode
1, carrier sense based backpressure is selected.
0, collision based backpressure is selected.
R/W
1
March 12, 2014
58
Revision 1.7
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