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CS8904 Scheda tecnica(PDF) 2 Page - Cirrus Logic |
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CS8904 Scheda tecnica(HTML) 2 Page - Cirrus Logic |
2 / 34 page 2 DS191PP2 CS8904 Crystal LAN™ Quad Ethernet Transceiver CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 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 |
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