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CS8900A-IQ 参数 Datasheet PDF下载

CS8900A-IQ图片预览
型号: CS8900A-IQ
PDF下载: 下载PDF文件 查看货源
内容描述: 水晶局域网? ISA以太网控制器 [Crystal LAN ⑩ ISA Ethernet Controller]
分类和应用: 控制器局域网以太网
文件页数/大小: 128 页 / 1360 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CS8900A  
Crystal LAN™ ISA Ethernet Controller  
5.2.1.3 Transfer............................................................................................................................ 81  
5.2.2 Receive Configuration ............................................................................................................... 81  
5.2.2.1 Configuring the Physical Interface.................................................................................... 81  
5.2.2.2 Choosing which Frame Types to Accept..........................................................................81  
5.2.2.3 Selecting which Events Cause Interrupts......................................................................... 82  
5.2.2.4 Choosing How to Transfer Frames .................................................................................. 82  
5.2.3 Receive Frame Pre-Processing................................................................................................. 83  
5.2.3.1 Destination Address Filtering ........................................................................................... 83  
5.2.3.2 Early Interrupt Generation................................................................................................ 84  
5.2.3.3 Acceptance Filtering......................................................................................................... 84  
5.2.3.4 Normal Interrupt Generation............................................................................................. 84  
5.2.4 Held vs. DMAed Receive Frames..............................................................................................84  
5.2.5 Buffering Held Receive Frames................................................................................................. 84  
5.2.6 Transferring Held Receive Frames............................................................................................ 86  
5.2.7 Receive Frame Visibility............................................................................................................. 86  
5.2.8 Example of Memory Mode Receive Operation ..........................................................................86  
5.2.9 Receive Frame Byte Counter..................................................................................................... 87  
5.3 Receive Frame Address Filtering........................................................................................................ 87  
5.3.0.1 Individual Address Frames............................................................................................... 88  
5.3.0.2 Multicast Frames.............................................................................................................. 88  
5.3.0.3 Broadcast Frames............................................................................................................ 88  
5.3.1 Configuring the Destination Address Filter ................................................................................ 88  
5.3.2 Hash Filter ................................................................................................................................. 89  
5.3.2.1 Hash Filter Operation ....................................................................................................... 89  
5.3.3 Broadcast Frame Hashing Exception ........................................................................................ 89  
5.4 Receive DMA ...................................................................................................................................... 90  
5.4.1 Overview.................................................................................................................................... 90  
5.4.2 Configuring the CS8900A for DMA Operation ........................................................................... 90  
5.4.3 DMA Receive Buffer Size .......................................................................................................... 90  
5.4.4 Receive-DMA-Only Operation ................................................................................................... 91  
5.4.5 Committing Buffer Space to a DMAed Frame............................................................................ 92  
5.4.6 DMA Buffer Organization...........................................................................................................92  
5.4.7 RxDMAFrame Bit....................................................................................................................... 92  
5.4.8 Receive DMA Example Without Wrap-Around ..........................................................................92  
5.4.9 Receive DMA Operation for RxDMA-Only Mode....................................................................... 92  
5.5 Auto-Switch DMA ................................................................................................................................ 93  
5.5.1 Overview.................................................................................................................................... 93  
5.5.2 Configuring the CS8900A for Auto-Switch DMA........................................................................ 94  
5.5.3 Auto-Switch DMA Operation...................................................................................................... 94  
5.5.4 DMA Channel Speed vs. Missed Frames.................................................................................. 95  
5.5.5 Exit From DMA........................................................................................................................... 95  
5.5.6 Auto-Switch DMA Example........................................................................................................ 96  
5.6 StreamTransfer ...................................................................................................................................96  
5.6.1 Overview.................................................................................................................................... 96  
5.6.2 Configuring the CS8900A for StreamTransfer........................................................................... 96  
5.6.3 StreamTransfer Operation ......................................................................................................... 96  
5.6.4 Keeping StreamTransfer Mode Active.......................................................................................96  
5.6.5 Example of StreamTransfer....................................................................................................... 98  
5.6.6 Receive DMA Summary............................................................................................................. 98  
5.7 Transmit Operation..............................................................................................................................99  
5.7.1 Overview.................................................................................................................................... 99  
5.7.2 Transmit Configuration............................................................................................................... 99  
5.7.2.1 Configuring the Physical Interface.................................................................................... 99  
CIRRUS LOGIC PRODUCT DATA SHEET  
DS271PP3  
6
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