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參數(shù)資料
| 型號： | AX88872P |
| 廠商： | ASIX Electronics Corporation |
| 英文描述： | 10/100BASE Dual Speed “Swipeater” Controller |
| 中文描述： | 一個(gè)10/100Base雙速“Swipeater”控制器 |
| 文件頁數(shù)： | 4/36頁 |
| 文件大?。?/td> | 399K |
| 代理商： | AX88872P |
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ASIX ELECTRONICS CORPORATION
4
CONFIDENTIAL
AX88872P Swipeater Controller PRELIMINARY
1.0 AX88872 Overview
1.1 General Description
The AX88872 that built in a switch is not only a simple repeater but also it provide 2 repeater expansion buses for
10M and 100M respectively. So the cascade function of the AX88872 can be backward compatible with the AX88871A
“Bripeater” in virtual switch mode. Also the AX88872 can support Master/Slave mode in stack application. That all the
repeater stack system forms one 100Mbps segment and one 10Mbps segment in Master/Slave mode. The two segments
are communication via the switch of the master chip.
In general, using RMII interface for 8 repeater ports can simplify the design and also provide a low cost solution with
RMII Quad/Octet PHY and low cost 64Kx32 SSRAM as buffer memory. In additional, the AX88872 provides two
10/100M MII/RMII switch ports alternative for up-link and down-link function. AX88872 has counterpart AX88873
that is a simple dual-speed repeater controller without built-in switch.
The switch port3 is fixed to 10Mbps speed and connect to 10Mbps repeater segment, The switch port2 is fixed to
100Mbps and connect to 100M repeater segment. The other switch ports 0 and 1 are connected to external MII or RMII
interfaces for various applications.
The built-in switch provides 4/8K look-up table that can learn, route and age with MAC address of each packet
automatically for packet forwarding and filtering. That is, the AX88872 forwards and filters packets with DA
(Destination Address) and the table. The performances of routing and learning fit wire speed (148800 packets/sec at
100Mbps). The switch provides three packet forwarding mode: Store-and-Forward, Fragment-Free (i.e., safe cut-
through) and auto mode. Dynamically the switch selects optimum mode for packet forwarding based on network quality.
During transmission, the data is obtained from the buffer memory and routed to the destination port. For half-duplex
operation, when collision occurs, the MAC controller will back off and retransmit in accordance to the IEEE802.3
specification. The switch also support flow-control mechanism. For full duplex operation mode, 802.3x flow control is
supported. For half-duplex operation, an optional jamming based flow control is available to avoid loss of data. This is
also well known as back-pressure. The flow control function is optional.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AX88873P | 制造商:ASIX 制造商全稱:ASIX 功能描述:10/100BASE Dual Speed 8-Port Repeater |
| AX88875AP | 制造商:ASIX 制造商全稱:ASIX 功能描述:10/100BASE 5-Port Dual Speed Bripeater Controller |
| AX-9.84375MAGV-T | 功能描述:晶體 9.84375MHz 30ppm 8pF -40C to 85C RoHS:否 制造商:AVX 頻率:26 MHz 容差: 頻率穩(wěn)定性:50 PPM 負(fù)載電容:8 pF 端接類型:SMD/SMT 封裝 / 箱體:1210 (3225 metric) 工作溫度范圍:- 40 C to + 150 C 尺寸:2.5 mm W x 3.2 mm L x 0.85 mm H 封裝:Reel |
| AX92101 | 制造商:Axiomtek 功能描述:AXI MINI PCI VGA MODULE - Bulk |
| AX92200 | 制造商:Axiomtek Co Ltd 功能描述:MINI-PCI ETHERNET CARD - Bulk |
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