Serial Port Interface, Rxd Cts Dcd Txd Rts Dtr | Motorola MVME177

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Functional Description

❏Parallel (printer) port

❏Ethernet transceiver interface

❏SCSI mass storage interface

Serial Port Interface

The CD2401 serial controller chip (SCC) is used to implement the four serial ports. The serial ports support the standard baud rates (110 to 38.4K baud). The four serial ports are different functionally because of the limited number of pins on the P2 I/O connector.

Serial port 1 is a minimum function asynchronous port. It uses:

❏RXD

❏CTS

❏TXD

❏RTS

Serial ports 2 and 3 are full function asynchronous ports. They use:

❏RXD

❏CTS

❏DCD

❏TXD

❏RTS

❏DTR

Serial port 4 is a full function asynchronous or synchronous port. It can operate at synchronous bit rates up to 64 k bits per second. It uses:

❏RXD

❏CTS

❏DCD

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Image 64

Motorola MVME177 manual Serial Port Interface, Rxd Cts Dcd Txd Rts Dtr

Contents

Single Board Computer Installation and Use Manual MVME177 Restricted Rights Legend Preface Page This equipment. Use extreme caution when handling, testing AdjustingPage Contents Page Page Flash Fill Test B-48Flash Patterns Test B-49 List of Figures List of Tables Introduction Model DesignationsMVME177 Model Designations Model Number Speed Major Differences MVME177 Features FeaturesFeature Description Speciﬁcations Cooling Requirements Characteristics SpeciÞcations MVME177 Speciﬁcations General Description FCC Compliance MVME712AM Bbram Equipment Required MVME712M MVME712A MVME712AM MVME712B Related Documentation System V/68 Motorola Document Title Number Support Information Manual Terminology Hardware Preparation and Installation Unpacking Instructions Start-up Overview Overview of Start-up ProcedureWhat you will need to do Refer to Appears You may also wish to obtainInitialize the clock Examine and/or change Hardware Preparation MVME177 Switches, Headers, Connectors, Polyswitches LEDs Conﬁguring MVME177 Headers Header Number Description ConÞguration Jumpers 1MB Eprom Header Number Description ConÞguration MVME177 Header Notes Do not remove all jumpers from J2. This may Disable the Sram Setup Instructions Bit J1 Pins Description MVME177 Module Installation Instructions MVME177 Module Installation Instructions Hardware Preparation and Installation System Considerations Hardware Preparation and Installation MVME177 Module Installation Instructions Hardware Preparation and Installation Controls and Indicators Abort Switch S1 Reset Switch S2 Front Panel Indicators DS1 DS4 Local Bus Memory Map Memory MapsNormal Address Range Local Bus Memory Map Range Devices Accessed Port Size InhibitSoftware Address Address Range Devices Accessed Port Size Local I/O Devices Memory Map $FFF77000 $FFF77FFF Reserved Software Initialization Local Reset OperationMulti-MPU Programming Considerations Sysreset Operating Instructions MVME177 Functional Description Functional Description IntroductionData Bus Structure MPU Block Scsi Flash Memory and Eprom MC68060 MPUFlash Memory Eprom and Flash Control and Conﬁguration Jumper or Control Bit Control Condition Memory ConÞguration Eprom Sram Do not short circuit Onboard Dram Battery Backed Up RAM and Clock VMEbus Interface Interfaces Serial Port Interface RXD CTS DCD TXD RTS DTR TXD RTS DTR Parallel Port Interface Ethernet Interface Scsi Interface Local ResourcesScsi Termination Watchdog Timer Programmable Tick TimersSoftware-Programmable Hardware Interrupts Module Identiﬁcation Timing PerformanceLocal Bus Time-out Local Bus to Dram Cycle Times ROM Cycle Times Scsi Transfers Remote Status and Control LAN DMA Transfers AEIA-232-D Interconnections Pin Signal Number Mnemonic Signal Name and Description Table A-1. EIA-232-D Interconnections Levels of Implementation Number Mnemonic Signal Name and DescriptionPin Signal Adaptations Sample Conﬁgurations Figure A-1. Middle-of-the-Road EIA-232-D Conﬁguration Figure A-2. Minimum EIA-232-D Connection Proper Grounding EIA-232-D Interconnections Overview of M68000 Firmware Description of 177Bug Debugger General Information Autoboot 177Bug Implementation Autoboot in progress... To abort hit Break ROMboot Network Boot Restarting the System Reset Abort Break SYSFAIL* Assertion/Negation MPU Clock Speed Calculation Memory Requirements Terminal Input/Output Control Disk I/O Support Blocks Versus Sectors Debugger General Information Device Probe Function IOC IOP IOT MAR MAW Disk I/O via 177Bug Commands IOI Input/Output Inquiry IOP Physical I/O to Disk BO Bootstrap Operating System BH Bootstrap and HaltIOT I/O Teach IOC I/O Control Dskcfig Disk I/O Error Codes Default 177Bug Controller and Device ParametersNetwork I/O Support Intel 82596 LAN Coprocessor Ethernet Driver UDP/IP Protocol Modules RARP/ARP Protocol Modules Bootp Protocol ModuleTftp Protocol Module Network Boot Control Module Network I/O Error CodesMultiprocessor Support Multiprocessor Control Register Mpcr Method Status codes that may be set by the bus master are Gcsr Method Diagnostic Facilities Table B-1. Diagnostic Test Groups Test Group Description Using the 177Bug Debugger Entering Debugger Command Lines Syntactic Variables Boldface strings Expression as a Parameter Data Type Base IdentiÞer Examples String Numeric Value Literal Expression Result In Hex Address Formats Address as a ParameterTable B-2. Debugger Address Parameter Formats Offset Registers 177BugMD 1327CDI Port Numbers Entering and Debugging Programs IOP 177Bug Vector Table and Workspace Hardware Functions Exception Vectors Used by 177Bug Table B-3. Exception Vectors Used by 177Bug Vector Offset Exception 177Bug Facility Using 177Bug Target Vector Table Creating a New Vector Table Except SUBQ.L 177Bug Generalized Exception Handler 177BugMD A7&30 Integer Data Types Floating Point SupportFloating Point Data Types Single Precision Real This format would appear in memory as Extended Precision Real Double Precision RealPacked Decimal Real Additions to Flash Commands Scientiﬁc Notation Flash Test Conﬁguration Acceptable Entries Erase TestFlash Fill Test Diagflash erase Flash Patterns Test Diagflash fill Default Flash Test Conﬁguration Figure B-1. Three Possible Mapping Options Sflash Command Sflashl Pflash ff800000 ff9fffff ffa00000 177Bug Debugger Command Set Table B-4. Debugger Commands Command Command Line Mnemonic Title SyntaxBI Range B W L Cnfg I M ENV D IOI CL Niot H a R n aPA n Nopa n Or SET nC VER E Debugger General Information Disk/Tape Controller Modules Supported First Second Controller Type Disk/Tape Controller Default Conﬁgurations Controller Address DeviceDevice Type Controller Device MVME323 -- Four Devices Controller MVME328 -- Fourteen Devices Controller LUN Address Device LUN Device Type IOT Command Parameters for Supported Floppy Types Floppy Types and Formats IOT Parameter Other Commands Conﬁgure Board Information Block Configure and Environment Commands Set Environment to Bug/Operating System ENV D = EFFFFFFF? Master Starting Address #2 = 00000000? Table D-1. ENV Command Parameters ENV Parameter and Options Default Meaning of Default LUN Network Auto Boot Memory Search Starting Address $02 refer to the Memory Requirements Accessible by the VMEbus. Default is Slave Ending Address #2 Master Ending Address #3 Short I/O VMEbus A16 Control ENetwork Controller Data Network Controller Modules Supported Controller Interface Type Clun Dlun Table F-1. Basic Troubleshooting Steps Condition Possible Problem Try This CTRL-Q Set mmddyyhhmm CR Envd CR St CR Env CRDe CR Index Index IN-7 IN-8 IN-9 IN-10 XON/XOFF