DB929B Datasheet, PDF (3/51 Pages) CML Microcircuits – Full Data Packet Framing

4-Level FSK Modem Data Pump
Page 3 of 50
MX929B PRELIMINARY INFORMATION
4.5.2.16 TIB: Transmit Intermediate Block ............................................................................... 21
4.5.2.17 TLB: Transmit Last Block ........................................................................................... 21
4.5.2.18 T4S: Transmit 4 Symbols ........................................................................................... 21
4.5.2.19 TSID: Transmit Station ID ............................................................................................ 22
4.5.2.20 RESET: Stop any current action................................................................................. 22
4.5.2.21 Task Timing................................................................................................................ 22
4.5.2.22 RRC Filter Delay......................................................................................................... 23
4.5.3 Control Register .................................................................................................................... 24
4.5.3.1 Control Register B7, B6: CKDIV - Clock Division Ratio.............................................. 24
4.5.3.2 Control Register B5, B4: FSTOL - Frame Sync Tolerance to Inexact Matches ......... 24
4.5.3.3 Control Register B3, B2: LEVRES - Level Measurement Modes ............................... 25
4.5.3.4 Control Register B1, B0: PLLBW - Phase-Locked Loop Bandwidth Modes............... 25
4.5.4 Mode Register....................................................................................................................... 26
4.5.4.1 Mode Register B7: IRQEN - IRQ Output Enable....................................................... 26
4.5.4.2 Mode Register B6: INVSYM - Invert Symbols ............................................................ 26
4.5.4.3 Mode Register B5: TX/RX - Tx/Rx Mode.................................................................. 26
4.5.4.4 Mode Register B4: RXEYE - Show Rx Eye ................................................................ 27
4.5.4.5 Mode Register B3: PSAVE - Powersave.................................................................... 27
4.5.4.6 Mode Register B2: SSIEN - 'S' Symbol IRQ Enable .................................................. 27
4.5.4.7 Mode Register B1, B0: SSYM - 'S' Symbol To Be Transmitted................................. 27
4.5.5 Status Register ..................................................................................................................... 28
4.5.5.1 Status Register B7: IRQ - Interrupt Request .............................................................. 28
4.5.5.2 Status Register B6: BFREE - Data Block Buffer Free................................................ 28
4.5.5.3 Status Register B5: IBEMPTY - Interleave Buffer Empty........................................... 28
4.5.5.4 Status Register B4: DIBOVF - De-Interleave Buffer Overflow ................................... 29
4.5.5.5 Status Register B3: CRCERR - CRC Checksum Error .............................................. 29
4.5.5.6 Status Register B2: 'S' Symbol Ready........................................................................ 29
4.5.5.7 Status Register B1, B0: SVAL - Received 'S' Symbol Value ...................................... 29
4.5.6 Data Quality Register ............................................................................................................ 29
4.6 CRC, FEC and Interleaving.............................................................................................. 30
4.6.1 Cyclic Redundancy Codes .................................................................................................... 30
4.6.1.1 CRC0.......................................................................................................................... 30
4.6.1.2 CRC1.......................................................................................................................... 30
4.6.1.3 CRC2.......................................................................................................................... 30
4.6.1.4 Forward Error Correction............................................................................................ 30
4.6.1.5 Interleaving ................................................................................................................. 31
4.7 Transmitted Symbol Shape.............................................................................................. 31
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Doc. # 20480171.003
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