- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1932 > KSZ8993MLI (Micrel Inc)IC SWITCH 10/100 3PORT 128-PQFP PDF資料下載
參數(shù)資料
| 型號： | KSZ8993MLI |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 20/86頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH 10/100 3PORT 128-PQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 系列： | * |
| 產(chǎn)品目錄頁面： | 1081 (CN2011-ZH PDF) |
| 其它名稱： | 576-3350 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁
Micrel, Inc.
KSZ8993M/ML
October 2008
27
M9999-020606
Functional Overview: MAC and Switch
Address Lookup
The internal lookup table stores MAC addresses and their associated information. It contains a 1K uni-cast
address table plus switching information. The KSZ8993M is guaranteed to learn 1K addresses and distinguishes
itself from hash-based lookup tables, which depending on the operating environment and probabilities, may not
guarantee the absolute number of addresses that can be learned.
Learning
The internal lookup engine will update its table with a new entry if the following conditions are met:
1.
The received packet's SA does not exist in the lookup table.
2.
The received packet is good; the packet has no receiving errors, and is of legal length.
The lookup engine will insert the qualified SA into the table, along with the port number and time stamp. If the
table is full, the last entry of the table will be deleted to make room for the new entry.
Migration
The internal lookup engine also monitors whether a station has moved. If so, it will update the table accordingly.
Migration happens when the following conditions are met:
1.
The received packet's SA is in the table but the associated source port information is different.
2.
The received packet is good; the packet has no receiving errors, and is of legal length.
The lookup engine will update the existing record in the table with the new source port information.
Aging
The lookup engine will update the time stamp information of a record whenever the corresponding SA appears.
The time stamp is used in the aging process. If a record is not updated for a period of time, the lookup engine will
remove the record from the table. The lookup engine constantly performs the aging process and will continuously
remove aging records. The aging period is about 200 seconds. This feature can be enabled or disabled through
Global Register 3 (0x03).
Forwarding
The KSZ8993M will forward packets using the algorithm that is depicted in the following flowcharts. Figure 4
shows stage one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and
dynamic table for the destination address, and comes up with “port to forward 1” (PTF1). PTF1 is then further
modified by spanning tree, IGMP snooping, port mirroring, and port VLA processes to come up with “port to
forward 2” (PTF2), as shown in Figure 5. The packet is sent to PTF2.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KSZ8993ML | IC SWITCH 10/100 W/TXRX 128PQFP |
| KSZ8995FQ | IC SWITCH 10/100 5PORT 128-PQFP |
| KSZ8995MA | IC SWITCH 10/100 5PORT 128PQFP |
| KSZ8995MI | IC SWITCH 5-PORT 10/100 128PQFP |
| KSZ9021GN TR | TXRX ETHERNET GB GMII/MII 64MLF |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8995FQ | 功能描述:以太網(wǎng) IC Integrated 5-Port Switch with Fiber on Port 3 & 4, Lead free RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8995FQ-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 Integrated 5-Port Switch with Fiber on Port 3 & 4 Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8995FQI | 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8995M | 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8995MA | 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。