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CS8900A-CQ Arkusz danych(PDF) 3 Page - Cirrus Logic |
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CS8900A-CQ Arkusz danych(HTML) 3 Page - Cirrus Logic |
3 / 137 page DS271PP4 3 CS8900A Crystal LAN™ ISA Ethernet Controller CIRRUS LOGIC PRODUCT DATASHEET 3.4.7.1 Determining EEPROM Size ................................................................. 22 3.4.7.2 Loading Configuration Data ................................................................. 23 3.4.8 TEEPROM Read-out Completion ........................................................................ 23 3.5 Programming the EEPROM ............................................................................................. 23 3.5.1 TEEPROM Commands ....................................................................................... 23 3.5.2 TEEPROM Command Execution ........................................................................ 23 3.5.3 TEnabling Access to the EEPROM .....................................................................24 3.5.4 TWriting and Erasing the EEPROM .................................................................... 24 3.6 Boot PROM Operation ..................................................................................................... 24 3.6.1 TAccessing the Boot PROM ................................................................................ 24 3.6.2 TConfiguring the CS8900A for Boot PROM Operation ....................................... 24 3.7 Low-Power Modes ..........................................................................................................25 3.7.1 THardware Standby ............................................................................................ 25 3.7.2 THardware Suspend ........................................................................................... 25 3.7.3 TSoftware Suspend ............................................................................................. 26 3.8 LED Outputs ..................................................................................................................... 27 3.8.0.1 LANLED .............................................................................................. 27 3.8.0.2 LINKLED or HC0 ................................................................................. 27 3.8.0.3 BSTATUS or HC1 ............................................................................... 27 3.8.1 TLED Connection ................................................................................................ 27 3.9 Media Access Control ......................................................................................................27 3.9.1 TOverview ........................................................................................................... 27 3.9.2 TFrame Encapsulation and Decapsulation ......................................................... 28 3.9.2.1 Transmission ....................................................................................... 28 3.9.2.2 Reception ............................................................................................ 28 3.9.2.3 Enforcing Minimum Frame Size .......................................................... 28 3.9.3 TTransmit Error Detection and Handling ............................................................. 29 3.9.3.1 Loss of Carrier ..................................................................................... 29 3.9.3.2 SQE Error ............................................................................................ 29 3.9.3.3 Out-of-Window (Late) Collision ............................................................ 29 3.9.3.4 Jabber Error ........................................................................................ 29 3.9.3.5 Transmit Collision ................................................................................ 29 3.9.3.6 Transmit Underrun .............................................................................. 29 3.9.4 TReceive Error Detection and Handling .............................................................. 30 3.9.4.1 CRC Error ............................................................................................ 30 3.9.4.2 Runt Frame .........................................................................................30 3.9.4.3 Extra Data ........................................................................................... 30 3.9.4.4 Dribble Bits and Alignment Error ......................................................... 30 3.9.5 TMedia Access Management .............................................................................. 30 3.9.5.1 Collision Avoidance ............................................................................. 30 3.9.5.2 Two-Part Deferral ................................................................................ 30 3.9.5.3 Simple Deferral .................................................................................... 31 3.9.5.4 Collision Resolution ............................................................................. 31 3.9.5.5 Normal Collisions ................................................................................ 31 3.9.5.6 Late Collisions ..................................................................................... 32 3.9.5.7 Backoff ................................................................................................ 32 3.9.5.8 Standard Backoff ................................................................................. 32 3.9.5.9 Modified Backoff ..................................................................................32 3.9.5.10 SQE Test ........................................................................................... 32 3.10 Encoder/Decoder (ENDEC) ........................................................................................... 33 3.10.1 TEncoder ........................................................................................................... 33 3.10.2 TCarrier Detection ............................................................................................. 33 3.10.3 TClock and Data Recovery ............................................................................... 33 |
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