4-Level FSK Modem Data Pump
Page 3 of 50
MX929B PRELIMINARY INFORMATION
4.5.2.16
4.5.2.17
4.5.2.18
TIB: Transmit Intermediate Block............................................................................... 21
TLB: Transmit Last Block ........................................................................................... 21
T4S: Transmit 4 Symbols........................................................................................... 21
4.5.2.19 TSID: Transmit Station ID............................................................................................ 22
4.5.2.20
4.5.2.21
4.5.2.22
RESET: Stop any current action................................................................................. 22
Task Timing................................................................................................................ 22
RRC Filter Delay......................................................................................................... 23
4.5.3 Control Register.................................................................................................................... 24
4.5.3.1
4.5.3.2
4.5.3.3
4.5.3.4
Control Register B7, B6: CKDIV - Clock Division Ratio.............................................. 24
Control Register B5, B4: FSTOL - Frame Sync Tolerance to Inexact Matches......... 24
Control Register B3, B2: LEVRES - Level Measurement Modes............................... 25
Control Register B1, B0: PLLBW - Phase-Locked Loop Bandwidth Modes............... 25
4.5.4 Mode Register....................................................................................................................... 26
4.5.4.1
4.5.4.2
Mode Register B7: IRQEN - IRQ Output Enable....................................................... 26
Mode Register B6: INVSYM - Invert Symbols............................................................ 26
4.5.4.3
4.5.4.4
4.5.4.5
4.5.4.6
4.5.4.7
Mode Register B5: TX/RX
- Tx/Rx Mode.................................................................. 26
Mode Register B4: RXEYE - Show Rx Eye................................................................ 27
Mode Register B3: PSAVE - Powersave.................................................................... 27
Mode Register B2: SSIEN - 'S' Symbol IRQ Enable .................................................. 27
Mode Register B1, B0: SSYM - 'S' Symbol To Be Transmitted................................. 27
4.5.5 Status Register ..................................................................................................................... 28
4.5.5.1
4.5.5.2
4.5.5.3
4.5.5.4
4.5.5.5
4.5.5.6
4.5.5.7
Status Register B7: IRQ - Interrupt Request.............................................................. 28
Status Register B6: BFREE - Data Block Buffer Free................................................ 28
Status Register B5: IBEMPTY - Interleave Buffer Empty........................................... 28
Status Register B4: DIBOVF - De-Interleave Buffer Overflow ................................... 29
Status Register B3: CRCERR - CRC Checksum Error.............................................. 29
Status Register B2: 'S' Symbol Ready........................................................................ 29
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
4.6.1.2
4.6.1.3
4.6.1.4
4.6.1.5
CRC0.......................................................................................................................... 30
CRC1.......................................................................................................................... 30
CRC2.......................................................................................................................... 30
Forward Error Correction............................................................................................ 30
Interleaving................................................................................................................. 31
4.7 Transmitted Symbol Shape.............................................................................................. 31
©2001 MX-COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480171.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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CMLMICRO [ CML MICROCIRCUITS ]
