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Maxim DS21Q55 T1 Transmit Transparency, T1 Receive-Side Digital-Milliwatt Code Generation

Models: DS21Q55

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DS21Q55

8.2 T1 Transmit Transparency

The software-signaling insertion-enable registers, SSIE1–SSIE4, can be used to select signaling insertion from the transmit-signaling registers, TS1–TS12, on a per-channel basis. Setting a bit in the SSIEx register allows signaling data to be sourced from the signaling registers for that channel.

In transparent mode, bit 7 stuffing and/or robbed-bit signaling is prevented from overwriting the data in the channels. If a DS0 is programmed to be clear, no robbed-bit signaling will be inserted nor will the channel have bit 7 stuffing performed. However, in the D4 framing mode, bit 2 will be overwritten by a zero when a yellow alarm is transmitted. Also, the user has the option to globally override the SSIEx registers from determining which channels are to have bit 7 stuffing performed. If the T1TCR1.3 and T1TCR2.0 bits are set to one, then all 24 T1 channels will have bit 7 stuffing performed on them, regardless of how the SSIEx registers are programmed. In this manner, the SSIEx registers are only affecting channels that are to have robbed-bit signaling inserted into them.

8.3 T1 Receive-Side Digital-Milliwatt Code Generation

Receive-side digital- milliwatt code generation involves using the receive digital- milliwatt registers (T1RDMR1/2/3) to determine which of the 24 T1 channels of the T1 line going to the backplane should be overwritten with a digital- milliwatt pattern. The digital- milliwatt code is an 8-byte repeating pattern that represents a 1kHz sine wave (1E/0B/0B/1E/9E/8B/8B/9E). Each bit in the T1RDMRx registers represents a particular channel. If a bit is set to a one, then the receive data in that channel will be replaced with the digital- milliwatt code. If a bit is set to zero, no replacement occurs.

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Maxim DS21Q55 specifications T1 Transmit Transparency, T1 Receive-Side Digital-Milliwatt Code Generation

Contents

Features ApplicationsOrdering Information DescriptionProduct Preview DS21Q55 Ansi Feature Highlights GeneralLine Interface Clock SynthesizerFramer/Formatter System InterfaceTest and Diagnostics Hdlc ControllersExtended System Information Bus Control PortProduct Preview DS21Q55 012103 Table of Contents Error Count Registers Signaling OperationPER-CHANNEL Idle Code Generation Channel Blocking Registers149 170177 186AC Timing Parameters and Diagrams Operating ParametersMechanical Descriptions Document Revision History Block Diagram Block Diagram FigureTransmit Side Pins PIN Function DescriptionTransmit Signaling Input TSYNCxTransmit Sync Input/OutputReceive Side Pins Receive Signaling Output Receive Signaling FreezeRSYNCx Receive SyncParallel Control Port Pins INTTstrst MUX BTSJtag Test Access Port Pins A7/ALEASJtrst JtmsLine Interface Pins Supply Pins PIN Symbol Type Description Pinout DS21Q55 PIN Description TableDVSS3 DVSS4ESIBRD1 ESIBRD2RFSYNC2 RFSYNC3RFSYNC4 RLCLK1RSIGF3 RSIGF4RSYNC1 RSYNC2TLINK3 TLINK4TNEGI1 TNEGI2TVSS2 TVSS3TVSS4 Package DS21Q55 Pin DIAGRAM, 27mm BGA AD1Parallel Port Register MapAddress Register Name Abbreviation SR9 IMR9Pcpr PCDR1RS1 RS2RS3 RS4TCBR3 TCBR4H1TC H1FCRFDLM1 RFDLM2Iboc RAFInformation Special PER-CHANNEL Register Operation Register NamePcpr Rsaoics Rsrcs Rfcs Brcs Thscs Peics Tfcs BtcsPCDR1 PCDR2PCDR3 PCDR4Programming Model Programming Sequence FigurePower-Up Sequence Master Mode RegisterTEST1 TEST0 Effect on Output Pins MstrregInterrupt Handling Status RegistersInformation Registers Interrupt Information RegistersIIR1 IIR2Clock MAP Clock MAP FigureTransmit Clock Source T1 FRAMER/FORMATTER Control Registers T1 Control RegistersT1RCR1 OOF2 OOF1 OUT of Frame CriteriaBit 1/Receive Japanese CRC6 Enable RJC Bit 5/Receive B8ZS Enable RB8ZS = B8ZS disabledBit 6/Receive Frame Mode Select RFM = D4 framing mode T1RCR2T1TCR1 Bit 7/Transmit B8ZS Enable TB8ZS = B8ZS disabled T1TCR206h TB8ZS TSLC96 Tzse FBCT2 FBCT1 TD4YM Tzbtsi TB7ZSBit 2/Transmit Frame Mode Select TFM = D4 framing mode T1CCR1T1 Common Control Register 07hT1 Transmit Transparency T1 Receive-Side Digital-Milliwatt Code GenerationT1RDMR1 T1RDMR2T1RDMR3 T1 Information Register INFO1Information Register 10hT1 Alarm Criteria Table Alarm SET Criteria Clear CriteriaYellow Alarm RAI E1 FRAMER/FORMATTER Control Registers E1 Control RegistersE1RCR1 E1 SYNC/RESYNC Criteria Table E1RCR234h RclaE1TCR1 Bit 0/Automatic Remote Alarm Generation ARA = disabled Bit 1/Automatic AIS Generation Aais = disabledBit 2/Automatic E-Bit Enable Aebe E1TCR2Automatic Alarm Generation E1 Information Registers INFO3INFO7 E1 Alarm Criteria Table Common Control and Status Registers CCR1TCSS1 TCSS0 Transmit Clock Source IDR SR2Bit 2/Receive Unframed All Ones Blue Alarm Condition RUA1 IMR2Interrupt Mask Register 19hSR3 1AhLspare LDN LUP Lotc Lorc V52LNK Rdma RRA Bit 0/Receive Remote Alarm Condition RRA = interrupt masked IMR31Bh Bit 2/V5.2 Link Detected Condition V52LNKSR4 1ChRSA1 RSA0 TMF TAF RMF Rcmf RAF Bit 2/Receive Multiframe Event RMFIMR4 11. I/O PIN Configuration Options IOCR1IOCR2 Loopback Configuration LbcrLoopback Control Register 4AhInformation Per-Channel Loopback PCLR1PCLR2 PCLR3 4DhPCLR4 4EhError Count Registers ErcntLine Code Violation Count Register Lcvcr T1 Line Code Violation Counting Options TableE1 Line Code Violation Counting Options Table T1 OperationLCVCR1 Line Code Violation Count Register42h LCVCR2Framing Mode Path Code Violation Count Register PcvcrT1 Path Code Violation Counting Arrangements Table Framing Mode Count MOS or F-BIT Errors What is Counted Frames Out Of Sync Count Register FoscrT1 Frames OUT of Sync Counting Arrangements Table ERCNT.1Information Bit Counter Register Ebcr FOSCR1FOSCR2 EBCR114. DS0 Monitoring Function Transmit DS0 Monitor RegistersTDS0SEL TDS0MReceive DS0 Monitor Registers RDS0SELRDS0M Signaling Operation Processor-Based Receive Signaling Hardware-Based Receive SignalingReceive-Signaling Reinsertion at Rser Change Of StateForce Receive Signaling All Ones Receive-Signaling FreezeSignaling Control Register SigcrMSB LSB MSB LSB CH2-A CH2-BCH1-A CH1-B CH4-A CH4-BReceive Signaling Registers E1 Mode, CAS Format RS1 to RS1660h to 6Fh CH9-A CH9-B CH9-C CH9-D RS6RSCSE1 , RSCSE2 , RSCSE3 , RSCSE4 RSCSE1RSCSE2 RSCSE3Processor-Based Transmit Signaling 15.2.1.1 T1 Mode 15.2.1.2 E1 ModeTime Slot Numbering Schemes Table Channel PhoneTransmit Signaling Registers E1 Mode, CAS Format TS1 to TS1650h to 5Fh TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9Transmit Signaling Registers E1 Mode, CCS Format Transmit Signaling Registers T1 Mode, ESF Format 50h to 5BhTS1 CH4-A CH4-B TS2 CH6-A CH6-BTS3 CH8-A CH8-B TS4Software Signaling Insertion Enable Registers, E1 CAS Mode SSIE1SSIE2 SSIE3 0AhLcaw SSIE4Software Signaling Insertion Enable Registers, T1 Mode Hardware-Based Transmit Signaling PER-CHANNEL Idle Code Generation Idle Code Array Address Mapping TableBits 0-5 of Iaar Register Maps to Channel Idle Code Programming Examples Write Iaar = 40h Write Pcicr = 7EhIaar PcicrTCICE1 TCICE2Information TCICE3 TCICE4RCICE1 RCICE2RCICE3 86hRCICE4 87hChannel Blocking Registers RCBR1RCBR2 RCBR3 RCBR4TCBR1 TCBR2TCBR3 8EhTCBR4 8FhElastic Stores Operation Bit 0/Receive Elastic Store Enable Rese EscrElastic Store Control Register 4FhSR5 1EhTesf Tesem Tslip Resf Resem Rslip IMR5Product Preview DS21Q55 109 012103 18.1.1 T1 Mode 18.1.2 E1 ModeReceive Side Elastic Store Delay After Initialization Table Minimum-Delay ModeTransmit Side Elastic Stores Initialization112 012103 19. G.706 INT Ermediate CRC-4 Updating E1 Mode only CRC-4 Recalculate Method Figure20. T1 BIT Oriented Code BOC Controller Transmit BOCReceive BOC Bocc BOC Control Register37h Rboce RBR RBF1 RBF0 SbocReceive FDL Register C0hSR8 24hIMR8 Additional Sa and International Si BIT Operation E1 only Hardware Scheme MethodInternal Register Scheme Based On Double-Frame Method RAF RnafTAF TnafInternal Register Scheme Based On CRC4 Multiframe Method RSiAFReceive Si Bits of the Align Frame C8hRRA RSa4 Receive Sa4 BitsCBh RSa5RSa6 Receive Sa6 BitsCDh RSa7RSa8 Receive Sa8 BitsCFh TSiAF Transmit Si Bits of the Align FrameD2h TRA TSa4 Transmit Sa4 BitsD5h TSa5TSa6 Transmit Sa6 BitsD7h TSa7TSa8 Transmit Sa8 BitsD9h Tsacr Hdlc Controllers Basic Operation DetailsHdlc Controller Registers Table Hdlc Configuration H1TC, H2TCHdlc #1 Transmit Control, Hdlc #2 Transmit Control 90h, A0hBit 0/Receive SS7 Fill In Signal Unit Delete Rsfd H1RC, H2RCHdlc #1 Receive Control, Hdlc #2 Receive Control 31h, 32hFifo Control H1FC, H2FCRFHWM2 RFHWM1 RFHWM0 Receive Fifo Watermark Bytes TFLWM2 TFLWM1 TFLWM0 Transmit Fifo Watermark BytesHdlc Mapping ReceiveRegister Channels H2RCS1, H2RCS2, H2RCS3, H2RCS4H1RTSBS, H2RTSBS 96h, A6hRCB8SE RCB7SE RCB6SE RCB5SE RCB4SE RCB3SE RCB2SE RCB1SE Transmit 97h, 98h, 99h, 9Ah A7h, A8h, A9h, AAhTHCS7 THCS6 THCS5 THCS4 THCS3 THCS2 THCS1 THCS0 H1TTSBS, H2TTSBS 9Bh, AbhTCB8SE TCB7SE TCB6SE TCB5SE TCB4SE TCB3SE TCB2SE TCB1SE SR6, SR7 Hdlc #1 Status Register Hdlc #2 Status Register20h, 22h Tmend RPE RPS Rhwm RNE Tlwm TNFIMR6, IMR7 INFO5, INFO6 PS2 PS1 PS0 Packet StatusINFO4 Fifo Information Receive Packet Bytes AvailableH1TFBA, H2TFBA H1RPBA, H2RPBA22.3.5 H1TF, H2TFH1RF, H2RF Legacy FDL Support T1 Mode Receive Hdlc Code ExampleReceive Section Rfdl RFDL7 RFDL6 RFDL5 RFDL4 RFDL3 RFDL2 RFDL1 RFDL0RFDLM1, RFDLM2 22.6 D4/SLC-96 Operation Transmit SectionTfdl Transmit FDL RegisterLine Interface Unit LIU Basic Network Connections FigureLIU Operation LIU ReceiverReceive G.703 Synchronization Signal E1 Mode Monitor ModeTypical Monitor Application Figure Transmit BPV Error Insertion Transmit G.703 Synchronization Signal E1 ModeLIU Transmitter Transmit Short-Circuit Detector/LimiterMclk Prescaler CMI Code Mark Inversion OptionCMI Coding Figure 23.7 LIU Control Registers LIC1E1 Mode Application Return LossNetwork Mode GC5 GC4 GC3 GC2 GC1 GC0 TlbcTransmit Line Build-Out Control 7DhLIC2 79hETS Lirst Ibpv TUA1 Jamux Scld Clds Bit 7/E1/T1 Select ETSLIC3 MM1 MM0RT1 RT0 Internal Receive Termination Configuration TT1 TT0 Internal Transmit Termination ConfigurationLIC4 MPS1 MPS0 Jamux LIC2.3INFO2 RL3 RL2 RL1 RL0CCR4 Ilut Timer Rscos SR116h Lrcl Tcle Tocd LolitcTimer Rscos IMR117h Recommended Circuits Basic Interface Figure 1µFProtected Interface Using Internal Receive Termination Component Specifications Transformer Specifications Table Specification Recommended ValueE1 Transmit Pulse Template Figure T1 Transmit Pulse Template FigureJitter Tolerance T1 Mode Figure Jitter Tolerance E1 Mode FigureJitter Attenuation T1 Mode Figure Jitter Attenuation E1 Mode FigureProgrammable IN-BAND Loop Code Generation and Detection Ibcc RDN2 RDN1 RDN0RUP2 RUP1 RUP0 TC1 TC0TCD1 Transmit Code Definition RegisterB7h TCD2RUPCD1 RUPCD2RDNCD1 RDNCD2 RsccRSC2 RSC1 RSC0 RSCD1 Receive -Spare Code Definition RegisterBEh RSCD2Bert Function Bert Register Description BC1PS2 PS1 PS0 Pattern Definition EIB2 EIB1 EIB0 Error Rate Inserted BC2E1h Length BitsBit 0/BERT Enable Berten = Bert disabled BICBER T Interface Control Register EAhSR9 26hBbed Bbco BEC0 BRA1 BRA0 Brlos Bsync IMR9 BawcBert Repetitive Pattern Set BRP1BRP2 BRP3Bert Bit Counter BBC1BBC2 BBC3Bert Error Counter BEC1BEC2 BEC3Payload Error Insertion Function Transmit Error Insertion Setup Sequence TableStep Action Error Rate Control Register Bits 0 to 3/Error Insertion Rate Select Bits ER0 to ER3ER3 ER2 ER1 ER0 Error Rate ERCNumber Of Error Registers Error Insertion Examples TableValue Write Read NOE1Number Of Errors Left Register NOEL1NOEL2 Channel Interleave Mode Frame Interleave ModeInterleaved PCM BUS Operation Iboc DA0 Device PositionIBS1 IBS0 BUS Size IBO Example Figure DS21Q55 #1 Rser DS21Q55 #3 RserExtended System Information BUS Esib Esib Group of Four DS21Q55s FigureESIBCR1 Extended System Information Bus Control RegisterB0h ESIBSEL2 ESIBSEL1 ESIBSEL0 BUS BIT DrivenESI3SEL2 ESI3SEL1 ESI3SEL0 Status Output T1 Mode E1 Mode ESI4SEL2 ESI4SEL1 ESI4SEL0 Status Output T1 Mode E1 ModeESIBCR2 B1hESIB1 ESIB2ESIB3 ESIB4Programmable Backplane Clock Synthesizer CCR2BPCS1 BPCS0 Fractional T1/E1 Support CCR372h Tdatfmt Tgpcken Rdatfmt RgpckenJTAG-BOUNDARY-SCAN Architecture and TEST-ACCESS Port Jtag Functional Block Diagram FigureTest-Logic-Reset Update-DRTAP Controller State Machine Run-Test-IdleUpdate-IR Select-IR-ScanCapture-IR Shift-IRTAP Controller State Diagram Figure Instruction Register Instruction Codes for Ieee 1149.1 Architecture TableInstruction Selected Register Instruction Codes ID Code Structure Table Device ID Codes TableMSB LSB Device BIT IDTest Registers Boundary Scan RegisterBypass Register Identification RegisterBIT PIN Symbol Type Control BIT Description Boundary Scan Control Bits TableRchblk Jtms Bpclk Jtclk Jtrst ESIBS0Tsig Teso NXA Tdata NXA Tsysclk Tssync Tchclk ESIBS1 MUXDvss Dvdd EsibrdRsync RLOS/LOTC RsysclkReceive Side ESF Timing Figure Rclk Rsysclk Rsysclk Rser Transmit Side D4 Timing Figure Transmit Side ESF Timing Figure Transmit Side Boundary Timing With Elastic Store Disabled Tsysclk TSER1 32.2 E1 Mode Receive Side Timing Figure Receive Side Boundary Timing With Elastic Store Disabled RSYNC2 Rmsync RSYNC3 Rchclk Rchblk 221 012103 Receive IBO Channel Interleave Mode Timing Figure Receive IBO Frame Interleave Mode Timing Figure TIMING, E1 Mode only Figure Transmit Side Timing Figure Tser LSB Si Tssync Tchclk Tchblk 228 012103 Transmit IBO Channel Interleave Mode Timing Figure Transmit IBO Frame Interleave Mode Timing Figure Thermal Characteristics Operating Parameters Absolute Maximum RatingsTHETA-JA θJA vs Airflow DC Characteristics Parameter Symbol MIN TYP MAXRecommended DC Operating Conditions CapacitanceAC Timing Parameters and Diagrams Parameter Symbol MIN TYP MAX UnitsIntel BUS Read Timing BTS = 0 / MUX = 1 Figure Intel BUS Write Timing BTS = 0 / MUX = 1 FigureMotorola BUS Timing BTS = 1 / MUX = 1 Figure 236 012103 Intel BUS Read Timing BTS = 0 / MUX = 0 Figure Motorola BUS Read Timing BTS = 1 / MUX = 0 Figure Receive Side AC Characteristics AC CHARACTERISTICS-RECEIVE SideParameter Symbol MIN TYP MAX Units Receive Side Timing T1 Mode Figure Receive Side TIMING, Elastic Store Enabled T1 Mode Figure Receive Line Interface Timing Figure Transmit AC Characteristics Parameter Symbol MINTYP E1 MAX UnitsTsysclk = 8.192MHz Tsysclk = 16.384MHz Transmit Side TIMING, Elastic Store Enabled Figure Transmit Line Interface Timing Figure Mechanical Descriptions Product Preview DS21Q55 248 012103