CS8900A
Crystal LAN™ ISA Ethernet Controller
3.4.7.1 Determining EEPROM Size ............................................................................................. 23
3.4.7.2 Loading Configuration Data ............................................................................................. 24
3.4.8 EEPROM Read-out Completion................................................................................................ 24
3.5 Programming the EEPROM................................................................................................................ 24
3.5.1 EEPROM Commands................................................................................................................ 24
3.5.2 EEPROM Command Execution................................................................................................. 24
3.5.3 Enabling Access to the EEPROM ............................................................................................. 25
3.5.4 Writing and Erasing the EEPROM............................................................................................. 25
3.6 Boot PROM Operation ........................................................................................................................ 25
3.6.1 Accessing the Boot PROM........................................................................................................ 25
3.6.2 Configuring the CS8900A for Boot PROM Operation................................................................ 25
3.7 Low-Power Modes .............................................................................................................................. 26
3.7.1 Hardware Standby..................................................................................................................... 26
3.7.2 Hardware Suspend.................................................................................................................... 26
3.7.3 Software Suspend ..................................................................................................................... 27
3.8 LED Outputs........................................................................................................................................ 28
3.8.0.1 LANLED ........................................................................................................................... 28
3.8.0.2 LINKLED or HC0.............................................................................................................. 28
3.8.0.3 BSTATUS or HC1 ............................................................................................................ 28
3.8.1 LED Connection ........................................................................................................................ 28
3.9 Media Access Control ......................................................................................................................... 28
3.9.1 Overview.................................................................................................................................... 28
3.9.2 Frame Encapsulation and Decapsulation.................................................................................. 29
3.9.2.1 Transmission.................................................................................................................... 29
3.9.2.2 Reception......................................................................................................................... 29
3.9.2.3 Enforcing Minimum Frame Size....................................................................................... 29
3.9.3 Transmit Error Detection and Handling ..................................................................................... 30
3.9.3.1 Loss of Carrier.................................................................................................................. 30
3.9.3.2 SQE Error......................................................................................................................... 30
3.9.3.3 Out-of-Window (Late) Collision ........................................................................................ 30
3.9.3.4 Jabber Error ..................................................................................................................... 30
3.9.3.5 Transmit Collision............................................................................................................. 30
3.9.3.6 Transmit Underrun ........................................................................................................... 30
3.9.4 Receive Error Detection and Handling ...................................................................................... 31
3.9.4.1 CRC Error ........................................................................................................................ 31
3.9.4.2 Runt Frame ...................................................................................................................... 31
3.9.4.3 Extra Data ........................................................................................................................ 31
3.9.4.4 Dribble Bits and Alignment Error...................................................................................... 31
3.9.5 Media Access Management ...................................................................................................... 31
3.9.5.1 Collision Avoidance.......................................................................................................... 31
3.9.5.2 Two-Part Deferral............................................................................................................. 31
3.9.5.3 Simple Deferral ................................................................................................................ 32
3.9.5.4 Collision Resolution.......................................................................................................... 32
3.9.5.5 Normal Collisions ............................................................................................................. 32
3.9.5.6 Late Collisions.................................................................................................................. 33
3.9.5.7 Backoff ............................................................................................................................. 33
3.9.5.8 Standard Backoff.............................................................................................................. 33
3.9.5.9 Modified Backoff............................................................................................................... 33
3.9.5.10 SQE Test........................................................................................................................ 33
3.10 Encoder/Decoder (ENDEC) .............................................................................................................. 34
3.10.1 Encoder ................................................................................................................................... 34
3.10.2 Carrier Detection ..................................................................................................................... 34
3.10.3 Clock and Data Recovery........................................................................................................ 34
CIRRUS LOGIC PRODUCT DATA SHEET
DS271PP3
3
CIRRUS [ CIRRUS LOGIC ]
