Motorola MVME197LE user manual User’s Manual

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EIA-232-D Interconnections

be provided by a pull-up resistor or gate as described before (see Figure A-1). Many modems expect a DTR high signal and issue a DSR. These signals are used by software to help prompt the operator about possible causes of trouble. The DTR signal is used sometimes to disconnect the phone circuit in preparation for another automatic call. It is necessary to provide these signals in order to talk to all possible modems (see Figure A-1). Figure A-1 is a good minimum configuration that almost always works. If the CTS and DCD signals are not received from the modem, the jumpers can be moved to artificially provide the needed signal. Figure A-2 shows a way that an EIA-232-D connector can be wired to enable a computer to connect to a basic terminal with only three wires. This is because most terminals have a DTR signal that is ON and can be used to pull-up the CTS, DCD and DSR signals. Two of these connectors wired back-to-back can be used. It must be realized that all the handshaking has been bypassed and possible diagnostic messages do not occur. Also, the TX and RX lines may have to be crossed since TX from a terminal is outgoing but the TX line on a modem is an incoming signal.

A-4	User’s Manual

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Contents MVME197LE MVME197LE/D2Restricted Rights Legend Preface Document TerminologyBIT Related Documentation Document Title Motorola Publication NumberPage Page Safety Summary Safety Depends on YOU Contents Appendix a List of Figures Xii List of Tables Xiv Introduction General DescriptionFeatures OteSpecifications MVME197LE SpecificationsCharacteristics Specifications Cooling Requirements Equipment Required FCC ComplianceSupport Information Unpacking Instructions Hardware PreparationHardware Preparation and Installation VMEbus Connector P1 Configuration Switches Switch S1Configuration Switch S1 General Information S1-1 to S1-8 OFF -- All Ones Factory Configuration Installation Instructions Switch S6Connectors MVME197LE Module Installation System Considerations MVME197LE/D2 Hardware Preparation and Installation Controls and Indicators Abort Switch S2Reset Switch S3 Front Panel Indicators DS1-DS6 Memory MapsProcessor Bus Memory Map Processor Bus Memory Map Address Range Devices Accessed Port Size Local Devices Memory MapDetailed I/O Memory Maps BusSwitch Register Memory Map 100108 110Memory Maps Ecdm CSR Register Memory Map ECDM0 ECDM1 ECDM2 ECDM3 ADDR/REGISTERDcam I2C Base Address = $C0 default Offset Dcam I2C Register Memory MapOperating Instructions VMEchip2 Memory Map Sheet 1 OffsetOperating Instructions Global Access BUS Watchdog Timeout Prescaler Adjust VMEchip2 Memory Map Sheet 2Operating Instructions VMEchip2 Memory Map Sheet 3 Operating Instructions VMEchip2 Memory Map Sheet 4 VMEchip2 Gcsr Base Address = $FFF40100Operating Instructions PCCchip2 Memory Map Printer Fault Interrupt Control Register $FFF42031 Printer SEL Interrupt Control Register $FFF42032Printer PE Interrupt Control Register $FFF42033 Printer Busy Interrupt Control Register $FFF42034Cirrus Logic CD2400 Memory Map Offsets Size Access Cirrus Logic CD2401 Serial Port Memory MapBase Address Is $FFF45000 Data Bits Address D31 D16 D15 Accesses may be 8-bit or 32-bit, but not 16-bit 11 C710 Scsi Memory Map12. MK48T08 BBRAM, TOD Clock Memory Map Address Range Description Size Bytes13. Bbram Configuration Area Memory Map 14. TOD Clock Memory MapData Bits Address Function BBRAM, TOD Clock Memory Map 0460000000470476 VMEbus Accesses to the Local Peripheral Bus VMEbus Memory Map01-W3869B03A 5000Local Reset Operation Software InitializationMulti-MPU Programming Considerations User’s Manual MVME197LE Functional Description Data Bus StructureMC88110 MPU Functional Description Bus Data Bus 256 BusSwitch MC88110 Address Data MUX AddressMezzanine Address Bus Memory ArrayBattery Backup RAM and Clock Flash MemoryOnboard Dram VMEbus Interface InterfacesSerial Port Interface Printer Interface Ethernet InterfaceProgrammable Tick Timers Peripheral ResourcesScsi Interface Scsi TerminationWatchdog Timer Processor Bus TimeoutLocal Peripheral Bus Timeout Interrupt SourcesMVME197LE/D2 Functional Description EIA-232-D Interconnections Pin Signal Signal Name and Description Number Mnemonic Table A-1. EIA-232-D InterconnectionsRing Indicator RI is sent by the modem to User’s Manual Figure A-1. Middle-of-the-Road EIA-232-D Configuration Figure A-2. Minimum EIA-232-D Connection Index NumericsIN-2 IN-3 Index

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