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CS8900A-IQZ Datasheet(PDF) 4 Page - Cirrus Logic |
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CS8900A-IQZ Datasheet(HTML) 4 Page - Cirrus Logic |
4 / 138 page 4 DS271F4 CS8900A Crystal LAN™ Ethernet Controller CIRRUS LOGIC PRODUCT DATASHEET 3.10.4 Interface Selection ............................................................................................36 3.10.4.1 10BASE-T Only .................................................................................36 3.10.4.2 AUI Only ............................................................................................36 3.10.4.3 Auto-Select ........................................................................................36 3.11 10BASE-T Transceiver ..................................................................................................36 3.11.1 10BASE-T Filters ..............................................................................................37 3.11.2 Transmitter .......................................................................................................37 3.11.3 Receiver ...........................................................................................................37 3.11.3.1 Squelch Circuit ...................................................................................37 3.11.3.2 Extended Range ................................................................................38 3.11.4 Link Pulse Detection .........................................................................................38 3.11.5 Receive Polarity Detection and Correction .......................................................38 3.11.6 Collision Detection ............................................................................................39 3.12 Attachment Unit Interface (AUI) ....................................................................................39 3.12.1 AUI Transmitter .................................................................................................39 3.12.2 AUI Receiver ....................................................................................................39 3.12.3 Collision Detection ............................................................................................39 3.13 External Clock Oscillator ...............................................................................................40 4.0 PACKETPAGE ARCHITECTURE..........................................................................................41 4.1 PacketPage Overview .....................................................................................................41 4.1.1 Integrated Memory .............................................................................................41 4.1.2 Bus Interface Registers ......................................................................................41 4.1.3 Status and Control Registers ..............................................................................41 4.1.4 Initiate Transmit Registers ..................................................................................41 4.1.5 Address Filter Registers .....................................................................................41 4.1.6 Receive and Transmit Frame Locations .............................................................41 4.2 PacketPage Memory Map ...............................................................................................42 4.3 Bus Interface Registers ...................................................................................................44 4.4 Status and Control Registers ..........................................................................................49 4.4.1 Configuration and Control Registers ...................................................................49 4.4.2 Status and Event Registers ................................................................................49 4.4.3 Status and Control Bit Definitions .......................................................................50 4.4.3.1 Act-Once Bits .......................................................................................50 4.4.3.2 Temporal Bits .......................................................................................50 4.4.3.3 Interrupt Enable Bits and Events .........................................................50 4.4.3.4 Accept Bits ...........................................................................................51 4.4.4 Status and Control Register Summary ...............................................................51 4.5 Initiate Transmit Registers ...............................................................................................69 4.6 Address Filter Registers ..................................................................................................71 4.7 Receive and Transmit Frame Locations ..........................................................................72 4.7.1 Receive PacketPage Locations ..........................................................................72 4.7.2 Transmit Locations .............................................................................................72 4.8 Eight and Sixteen Bit Transfers .......................................................................................72 4.8.1 Transferring Odd-Byte-Aligned Data ..................................................................73 4.8.2 Random Access to CS8900A Memory ...............................................................73 4.9 Memory Mode Operation .................................................................................................73 4.9.1 Accesses in Memory Mode .................................................................................73 4.9.2 Configuring the CS8900A for Memory Mode ......................................................74 4.9.3 Basic Memory Mode Transmit ............................................................................74 4.9.4 Basic Memory Mode Receive .............................................................................75 4.9.5 Polling the CS8900A in Memory Mode ...............................................................75 4.10 I/O Space Operation ......................................................................................................75 4.10.1 Receive/Transmit Data Ports 0 and 1 ...............................................................75 |
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