CMX969P4 Ver la hoja de datos (PDF) - MX-COM Inc
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CMX969P4 Datasheet PDF : 35 Pages
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MOTIENTSM/ARDISSM RD-LAPTM MDC4800 Modem
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CONTENTS
Section
CMX969 Advance Information
Page
1 Block Diagram ............................................................................................................... 4
2 Signal List ...................................................................................................................... 5
3 External Components ................................................................................................... 6
4 General Description ...................................................................................................... 7
4.1 Description of Blocks ......................................................................................................... 7
4.1.1 Data Bus Buffers..................................................................................................................... 7
4.1.2 Address and R/W Decode ...................................................................................................... 7
4.1.3 Status and Data Quality Registers.......................................................................................... 7
4.1.4 Command, Mode and Control Registers ................................................................................ 7
4.1.5 Data Buffer.............................................................................................................................. 7
4.1.6 CRC Generator/Checker ........................................................................................................ 7
4.1.7 FEC Encoder/Decoder............................................................................................................ 7
4.1.8 Interleave/De-interleave Buffer ............................................................................................... 8
4.1.9 Auto Frame Sync Detect, Rx Level & Timing Extraction, Rx Data Symbol Extraction........... 8
4.1.10 Rx Input Amp .......................................................................................................................... 8
4.1.11 Low Pass Filter ....................................................................................................................... 8
4.1.12 Tx Output Buffer...................................................................................................................... 8
4.1.13 Clock Oscillator and Dividers.................................................................................................. 8
4.2 Modem - µC Interaction ..................................................................................................... 9
4.3 Binary to RD-LAP 4-Level Symbol Translation................................................................... 9
4.4 Frame Structure............................................................................................................... 10
4.4.1 MDC Mode............................................................................................................................ 10
4.4.2 RD-LAP Mode....................................................................................................................... 11
4.5 The Programmer's View................................................................................................... 12
4.5.1 Data Block Buffer .................................................................................................................. 12
4.5.2 Control Register .................................................................................................................... 12
4.5.3 Mode Register....................................................................................................................... 13
4.5.4 Command Register ............................................................................................................... 14
4.6 CMX969 Modem Tasks ................................................................................................... 16
4.6.1 Transmit Mode ...................................................................................................................... 16
4.6.2 Receive Mode: ...................................................................................................................... 19
4.6.3 Task Timings......................................................................................................................... 22
4.6.4 Lowpass Filter Delay ............................................................................................................ 24
4.6.5 Status Register ..................................................................................................................... 24
4.6.6 Data Quality Register............................................................................................................ 26
¤2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480211.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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