CS8904
Crystal LAN™ Quad Ethernet Transceiver
TABLE OF CONTENTS
1.0 INTRODUCTION.....................................................................................................3
1.1 General Description ......................................................................................................... 3
1.2 System Applications ........................................................................................................ 4
1.3 Key Features and Benefits ............................................................................................... 4
1.3.1 Low Cost, Low Noise, More Features .................................................................... 4
2.0 PIN DESCRIPTION.................................................................................................7
2.1 Controller Interface.......................................................................................................... 8
2.2 10BASE-T Interface ........................................................................................................ 9
2.3 LED Pins.......................................................................................................................... 9
2.4 General Pins ..................................................................................................................... 9
3.0 THEORY OF OPERATION .................................................................................12
3.1 Overview........................................................................................................................ 12
3.2 Encoder/Decoder (ENDEC)........................................................................................... 12
3.2.1 Encoder ................................................................................................................ 13
3.2.2 Carrier Detection................................................................................................... 13
3.2.3 Clock and Data Recovery ..................................................................................... 13
3.3 10BASE-T Transceiver.................................................................................................. 13
3.3.1 10BASE-T Filters ................................................................................................. 14
3.3.2 Transmitter............................................................................................................ 14
3.3.3 Receiver ................................................................................................................ 14
3.3.4 Collision Detection ............................................................................................... 15
4.0 FUNCTIONAL DESCRIPTION...........................................................................16
4.1 Reset and Calibration..................................................................................................... 16
4.1.1 Reset Operation..................................................................................................... 16
4.1.2 Allowing Time for Reset....................................................................................... 16
4.2 Mode Control ................................................................................................................. 16
4.3 Controller Interface........................................................................................................ 16
4.3.1 Transmit and Receive Interface ............................................................................ 16
4.3.2 Control and Status Information............................................................................. 17
4.4 External Clock Oscillator............................................................................................... 19
5.0 SPECIFICATIONS.................................................................................................20
ABSOLUTE MAXIMUM RATINGS................................................................................. 20
RECOMMENDED OPERATING CONDITIONS ............................................................. 20
DC CHARACTERISTICS................................................................................................... 20
DIGITAL INPUT/OUTPUT CHARACTERISTICS .......................................................... 21
SWITCHING CHARACTERISTICS - MODE 1................................................................ 22
SWITCHING CHARACTERISTICS - MODE 2................................................................ 24
SWITCHING CHARACTERISTICS - MODE 3................................................................ 26
SWITCHING CHARACTERISTICS - MODE 4................................................................ 28
SWITCHING CHARACTERISTICS - MODE 5................................................................ 30
10BASE-T CHARACTERISTICS ...................................................................................... 32
CRYSTAL OSCILLATOR REQUIREMENTS.................................................................. 32
6.0 PACKAGE DIMENSIONS....................................................................................33
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
2
DS191PP2
CIRRUS [ CIRRUS LOGIC ]
