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CS8900A-IQZ Arkusz danych(PDF) 2 Page - Cirrus Logic |
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CS8900A-IQZ Arkusz danych(HTML) 2 Page - Cirrus Logic |
2 / 138 page 2 DS271F4 CS8900A Crystal LAN™ Ethernet Controller CIRRUS LOGIC PRODUCT DATASHEET TABLE OF CONTENTS 1.0 INTRODUCTION ......................................................................................................................8 1.1 General Description ...........................................................................................................8 1.1.1 Direct ISA-Bus Interface .......................................................................................8 1.1.2 Integrated Memory ...............................................................................................8 1.1.3 802.3 Ethernet MAC Engine .................................................................................8 1.1.4 EEPROM Interface ...............................................................................................8 1.1.5 Complete Analog Front End .................................................................................8 1.2 System Applications ..........................................................................................................8 1.2.1 Motherboard LANs ...............................................................................................8 1.2.2 Ethernet Adapter Cards ........................................................................................9 1.3 Key Features and Benefits ..............................................................................................10 1.3.1 Very Low Cost ....................................................................................................10 1.3.2 High Performance ...............................................................................................10 1.3.3 Low Power and Low Noise .................................................................................10 1.3.4 Complete Support ...............................................................................................10 2.0 PIN DESCRIPTION .............................................................................................................12 3.0 FUNCTIONAL DESCRIPTION ...............................................................................................17 3.1 Overview .........................................................................................................................17 3.1.1 Configuration ......................................................................................................17 3.1.2 Packet Transmission ..........................................................................................17 3.1.3 Packet Reception ...............................................................................................17 3.2 ISA Bus Interface ............................................................................................................18 3.2.1 Memory Mode Operation ....................................................................................18 3.2.2 I/O Mode Operation ............................................................................................18 3.2.3 Interrupt Request Signals ...................................................................................18 3.2.4 DMA Signals .......................................................................................................18 3.3 Reset and Initialization ....................................................................................................19 3.3.1 Reset ..................................................................................................................19 3.3.1.1 External Reset, or ISA Reset ...............................................................19 3.3.1.2 Power-Up Reset ..................................................................................19 3.3.1.3 Power-Down Reset ..............................................................................19 3.3.1.4 EEPROM Reset ...................................................................................19 3.3.1.5 Software Initiated Reset .......................................................................19 3.3.1.6 Hardware (HW) Standby or Suspend ..................................................19 3.3.1.7 Software (SW) Suspend ......................................................................19 3.3.2 Allowing Time for Reset Operation .....................................................................20 3.3.3 Bus Reset Considerations ..................................................................................20 3.3.4 Initialization .........................................................................................................20 3.4 Configurations with EEPROM .........................................................................................21 3.4.1 EEPROM Interface .............................................................................................21 3.4.2 EEPROM Memory Organization .........................................................................21 3.4.3 Reset Configuration Block ..................................................................................21 3.4.3.1 Reset Configuration Block Structure ....................................................22 3.4.3.2 Reset Configuration Block Header ......................................................22 3.4.3.3 Determining the EEPROM Type ..........................................................23 3.4.3.4 Checking EEPROM for presence of Reset Configuration Block ..........23 3.4.3.5 Determining Number of Bytes in the Reset Configuration Block .........23 3.4.4 Groups of Configuration Data .............................................................................23 3.4.4.1 Group Header ......................................................................................23 3.4.5 Reset Configuration Block Checksum ................................................................24 3.4.6 EEPROM Example .............................................................................................24 3.4.7 EEPROM Read-out ............................................................................................24 |
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