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CS8900-IQ3

Crystal LAN™ ISA Ethernet Controller

Cirrus Logic 

CS8900A

Crystal LAN™ ISA Ethernet Controller

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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