參數(shù)資料
| 型號： | KSZ8995M |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 24/73頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH 10/100 5PORT 128PQFP |
| 標準包裝： | 66 |
| 系列： | * |
| 類型： | * |
| 應用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-BFQFP |
| 供應商設備封裝： | 128-PQFP（14x20） |
| 包裝： | 托盤 |
| 產品目錄頁面： | 1081 (CN2011-ZH PDF) |
| 配用： | 576-1607-ND - BOARD EVAL EXPERIMENT KSZ8995MA |
| 其它名稱： | 576-1038 |
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KS8995M
Micrel
M9999-120403
30
December 2003
Tx Port
Ingress Tag Field
“Tag Insertion”“Tag Removal”
Egress Action to Tag Field
(0x810+ port mask)
0
Modify tag field to 0x8100
Recalculate CRC
No change to TCI if not null VID
Replace VID with ingress (port 5) port VID if null VID
(0x810+ port mask)
0
1
(STPID + TCI) will be removed
Padding to 64 bytes if necessary
Recalculate CRC
(0x810+ port mask)
1
0
Modify tag field to 0x8100
Recalculate CRC
No change to TCI if not null VID
Replace VID with ingress (port 5) port VID if null VID
(0x810+ port mask)
1
Modify tag field to 0x8100
Recalculate CRC
No change to TCI if not null VID
Replace VID with ingress (port 5) port VID if null VID
Not Tagged
Don’t care
Determined by the dynamic MAC address table
Table 5. STPID Egress Rules (Processor to Switch Port 5)
For packets from regular ports (port 1 - port 4) to port 5, the port mask is used to tell the processor which port the packet was
received on, defined as:
“0001” from port 1,
“0010” from port 2,
“0100” from port 3,
“1000” from port 4
No values other than the previous four defined should be received in this direction in the special mode. Table 6 shows the
egress rule for this direction.
Ingress Packets
Egress Action to Tag Field
Tagged with 0x8100 + TCI
Modify TPID to 0x810 + “port mask,” which indicates source port
No change to TCI, if VID is not null
Replace null VID with ingress port VID
Recalculate CRC
Not tagged
Insert TPID to 0x810 + “port mask,” which indicates source port
Insert TCI with ingress port VID
Recalculate CRC
Table 6. STPID Egress Rules (Switch to Processor)
IGMP Support
There are two parts involved to support IGMP in layer 2. The first part is “IGMP” snooping. The switch will trap IGMP packets
and forward them only to the processor port. The IGMP packets are identified as IP packets (either Ethernet IP packets or IEEE
802.3 SNAP IP packets) AND IP version = 0x4 AND protocol number = 0x2. The second part is “multicast address insertion”
in the static MAC table. Once the multicast address is programmed in the static MAC table, the multicast session will be trimmed
to the subscribed ports, instead of broadcasting to all ports. To enable this feature, set register 5 bit 6 to 1. Also “special tag
mode” needs to be enabled, so that the processor knows which port the IGMP packet was received on. Enable “special tag
mode” by setting both register 11 bit 0 and register 80-bit 2.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8995MA | 功能描述:以太網 IC 5 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產品: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 |
| KSZ8995MA4 | 功能描述:IC SWITCH 5-PORT 10/100 128PQFP RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| KSZ8995MAB3 | 功能描述:IC SWITCH 5-PORT 10/100 128PQFP RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| KSZ8995MA-EVAL | 功能描述:以太網開發(fā)工具 KSZ8995MA Evaluation Board RoHS:否 制造商:Micrel 產品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8995MAI | 功能描述:以太網 IC 5 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產品: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 |
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