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Motorola MVME172 manual VMEbus System Controller, Arbiter, Iack Daisy-Chain Driver, Bus Timer

Models: MVME172

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	Functional Blocks
VMEbus System Controller	2
	2

With the exception of the optional SERCLK Driver and the Power Monitor, the chip includes all the functions that a VMEbus System Controller must provide. The System Controller is enabled/disabled with the aid of an external jumper (the only jumper required in a VMEchip2 based VMEbus interface).

Arbiter

The arbitration algorithm used by the chip arbiter is selected by software. All three arbitration modes defined in the VMEbus Specification are supported: Priority (PRI), Round-Robin-Select (RRS), as well as Single (SGL). When operating in the PRI mode, the arbiter asserts the BCLR line whenever it detects a request for the bus whose level is higher that the one being serviced.

The chip includes an arbitration timer, preventing a bus lockup when no requester assumes control of the bus after the arbiter has issued a grant. Using a control bit, this timer can be enabled or disabled. When enabled, it assumes control of the bus by driving the BBSY signal after 256 μsecs, releasing it after satisfying the requirements of the VMEbus specification, and then re-arbitrating any pending bus requests.

IACK Daisy-Chain Driver

Complying with the latest revision of the VMEbus specification, the System Controller includes an IACK Daisy-Chain Driver, ensuring that the timing requirements of the IACK daisy-chain are satisfied.

Bus Timer

The Bus Timer is enabled/disabled by software to terminate a VMEbus cycle by asserting BERR if any of the VMEbus data strobes is maintained in its asserted state for longer than the programmed time-out period. The time-out period can be set to 8, 64, or 256 secs. The bus timer terminates an unresponded VMEbus cycle only if both it and the system controller are enabled.

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Motorola MVME172 manual VMEbus System Controller, Arbiter, Iack Daisy-Chain Driver, Bus Timer

Contents

VME Embedded Controller Programmer’s Reference Guide MVME172Restricted Rights Legend Preface Recent Updates Page Page Contents VMEchip2 Page Page MC2 Chip Xii IP2 Chip Chapter Mcecc Index Figures Xvii Xviii Overview IntroductionBoard Description and Memory Maps MVME172 Features Summary Requirements Fuses LAN power SCON, LAN, Fuse LAN powerFeature 200/300-Series No-VMEbus-Interface Option Block DiagramsFunctional Description 300-Series MVME172 Block Diagram 500-Series MVME172 Block DiagramVMEchip2 MC2 Chip Address Bit # Redundant Functions in the VMEchip2 and MC2 ChipNormal Address Range Memory MapsVMEbus Interface and VMEchip2 Local Bus Memory Map300-Series MVME172 Local Bus Memory Map Memory Maps Devices Port Software Address Range Cache Accessed Width Inhibit500-Series MVME172 Local Bus Memory Map Memory Maps 300-Series MVME172 Local I/O Devices Memory Map Address Range Devices Accessed Port Size Width$FFFBC000 $FFFBC01F $FFFBC800 $FFFBC81F Memory Maps Address Range Device Port Size Width 500-Series MVME172 Local I/O Devices Memory Map2KB $FFFBC800 $FFFBC81F Board Description and Memory Maps Tables 1-7 through 1-17 give the detailed memory maps for Detailed I/O Memory MapsOffset VMEchip2 Memory Map Sheet 1This sheet begins on facing PRE VMEchip2 Memory Map Sheet 2Compare Register Counter Overflow Offsets Bit Numbers VMEchip2 Memory Map Sheet 3Offset D31-D24 D23-D16 D15-D8 D7-D0 MC2 Chip Register MapMC2 Chip Base Address = $FFF42000 Address Range Selected Device Port Width Size IP2 Chip Overall Memory MapIP2 Chip Base Address = $FFFBC000 10. IP2 Chip Memory Map Control and Status RegistersDMA Dlbe Chani TBL $51 DMAc INT Dlbe Ipend Chani TBL Ipto Done Mcecc Base Address = $FFF43000 1st $FFF43100 2nd 11. Mcecc Internal Register Memory MapName D31 D30 D29 D28 D27 D26 D25 D24 Z85230 SCC Register Address 12. Z85230 SCC Register Addresses13 CA Ethernet LAN Memory Map 14 C710 Scsi Memory Map Address Range Description Size Bytes BBRAM/TOD Clock Memory Map15. MK48T58 BBRAM/TOD Clock Memory Map Local Scsi ID 16. Bbram Configuration Area Memory MapAddress Data Bits Function 17. TOD Clock Memory MapFT = Frequency Test x = Must be set to Ecc1memserial 12 characters are followed by four blanks 3992B03A Interrupt Acknowledge Map VMEbus Memory MapVMEbus Short I/O Memory Map VMEbus Accesses to the Local BusSoftware Support Considerations InterruptsLocal Bus Time-out Cache CoherencySources of Local Berr VMEbus Berr VMEbus Access Time-outLocal Dram Parity Error Bus Error ProcessingMPU Parity Error Description of Error Conditions on the MVME172MPU Local Bus Time-out MPU Off-board ErrorMPU TEA Cause Unidentified Dmac Parity Error Dmac VMEbus ErrorDmac LTO Error Dmac Off-board ErrorDmac TEA Cause Unidentified LAN Parity ErrorLAN LTO Error LAN Off-Board ErrorScsi LTO Error Scsi Parity ErrorScsi Off-Board Error Example of the Proper Use of Bus Timers MVME172 MC68060 Indivisible Cycles Illegal Access to IP Modules from External VMEbus Masters Page VMEchip2 Summary of Major FeaturesVMEchip2 Introduction Local Bus to VMEbus Interface Functional BlocksVMEchip2 Block Diagram VMEchip2 Local Bus to VMEbus Requester VMEchip2 Functional Blocks VMEbus to Local Bus InterfaceLocal Bus to VMEbus DMA Controller Functional Blocks No Address Increment DMA Transfers Dmac VMEbus Requester Prescaler Tick and Watchdog TimersWatchdog Timer Tick TimersVMEbus Interrupter Iack Daisy-Chain Driver Bus TimerVMEbus System Controller ArbiterLocal Bus Interrupter and Interrupt Handler Reset DriverFunctional Blocks Global Control and Status Registers Lcsr Programming ModelSummary of the Lcsr is shown in Table VMEchip2 Memory Map Lcsr Summary Sheet 1 IO2 IO1 VMEchip2 Memory Map Lcsr Summary Sheet 2 IRQ7 IRQ6 IRQ5 Programming the VMEbus Slave Map Decoders Lcsr Programming Model VMEbus Slave Starting Address Register VMEbus Slave Ending Address RegisterVMEbus Slave Address Translation Address Offset Register Segment Address Translation Size Select Value VMEbus Slave Address Translation Select Register$FFF4000C 16 bits SNP2 VMEbus Slave Write Post and Snoop Control RegisterWP2 BLK VMEbus Slave Address Modifier Select RegisterDAT PGMSUP A32USR ADDER1 WP1SNP1 Cycles When this bit is high, the first map decoder responds toBlock access cycles A24 access cyclesBit is low, the first map decoder does not respond to A32 access cyclesVMEbus supervisory access cycles. When this bit is low Programming the Local Bus to VMEbus Map DecodersVMEchip2 Local Bus Slave VMEbus Master Ending Address Register Local Bus Slave VMEbus Master Starting Address Register $FFF4001C 16 bits $FFF40024 16 bits D16 Local Bus Slave VMEbus Master Attribute RegisterDecoder 3. Because the local bus to VMEbus interface Segment defined by map decoder 3. When this bit isNot support block transfers, the block transfer address Segment defined by map decoder 2. When this bit isBus map decoder Decoder 2. Since the local bus to VMEbus interface doesDecoder 1. Because the local bus to VMEbus interface Segment defined by map decoder 1. When this bit isVMEbus Slave Gcsr Group Address Register VMEbus Slave Gcsr Board Address Register EN3 Local Bus to VMEbus Enable Control RegisterEN1 EN2Local Bus to VMEbus I/O Control Register I2EN I2WPProgramming the VMEchip2 DMA Controller Entry Function Dmac Command Table FormatDmac Registers ROM0 Prom Decoder, Sram and DMA Control RegisterSrams TblscLvfair Local Bus to VMEbus Requester Control RegisterLvreql LvrwdRobn DHBDhalt DfairDtbl DENSNP TvmeLinc VincVME AM Dmac VMEbus Address Counter Dmac Local Bus Address CounterDmac VMEbus Address Counter Dmac Byte Counter Table Address CounterVMEbus Interrupter Control Register IRQ1S IrqlIrqs IrqcMPU Status and DMA Interrupt Count Register VMEbus Interrupter Vector RegisterTBL Dmac Status RegisterDone VMEVMEbus Arbiter Time-out Control Register Programming the Tick and Watchdog TimersTime on VgtoVato LbtoPrescaler register = 256 B clock MHz Prescaler Control RegisterTick timer 1 Compare Register Tick Timer 1 Compare RegisterTick Timer 1 Counter Tick timer 2 Counter Tick Timer 2 Compare RegisterTick Timer 2 Counter Board Control Register Watchdog Timer Control Register Tick Timer 2 Control Register Prescaler Counter Tick Timer 1 Control RegisterProgramming the Local Bus Interrupter Interrupt Vector Priority for Simultaneous Interrupts Local Bus Interrupter SummaryDmac Local Bus Interrupter Status Register bits SIG1 LM0LM1 SIG0SW3 SW0SW1 SW2VME4 VME1VME2 VME3Local Bus Interrupter Enable Register bits ESIG1 ELM0ELM1 ESIG0ESW3 ESW0ESW1 ESW2EIRQ4 EIRQ1EIRQ2 EIRQ3Software Interrupt Set Register bits Interrupt Clear Register bits Interrupt Level Register 1 bits Sysf Level WPE Level Interrupt Level Register 2 bits SIG3 Level SIG2 Level Interrupt Level Register 3 bits SW5 Level SW4 Level Interrupt Level Register 4 bits VIRQ6 VIRQ5 Level VBR Vector Base RegisterControl Register Connects to pin 18 of the Remote Status and Control Connects to pin 16 of the Remote Status and ControlConnects to pin 17 of the Remote Status and Control Enint Miscellaneous Control Register100 Computer Group Literature Center Web Site Gcsr Programming Model 102 Computer Group Literature Center Web Site Gcsr Programming Model Programming the GcsrLocal Bus Shows a summary of the GcsrVMEchip2 Memory Map Gcsr Summary VMEchip2 LM/SIG Register VMEchip2 Revision RegisterVMEchip2 ID Register LM2 RST LM3VMEchip2 Board Status/Control Register ISFGeneral Purpose Register Local Bus $FFF40110/VMEbus $XXY8 16 bits Local Bus $FFF40118/VMEbus $XXYC 16 bits MC2 Chip Flash and Prom Interface MC2 Chip InitializationMPU Port and MPU Channel Attention Bbram Interface82596CA LAN Interface MC68060-Bus Master Support for 82596CA Lanc Bus ErrorLanc Interrupt 53C710 Scsi Controller InterfaceSram Memory Controller NON-ECC Dram Memory ControllerClock Budget Operating Conditions Z85230 SCC InterfaceDram Performance Address Range SCC Device Number Tick TimersMemory Map of the MC2 Chip Registers Watchdog TimerLocal Bus Timer Memory Map of the MC2 Chip Registers Programming Model MC2 Chip Revision Register MC2 Chip ID RegisterGeneral Control Register SCCIT10 Number of Z85230s Interrupt Vector Base RegisterInterrupt Source IV3-IV0 Daisy Chain Priority Interrupt Vector Base Register Encoding PriorityTick Timer 1 and 2 Compare and Counter Registers Programming the Tick TimersTick Timer 2 Compare Register Tick Timer 1 Compare RegisterTick Timer 1 Counter LSB Prescaler Count Register Tick Timer 2 CounterTick Timer 1 and 2 Control Registers Prescaler Clock Adjust RegisterOVF3-OVF0 Tick Timer 2 Control RegisterTick Timer 1 Control Register Tick Timer 2 Interrupt Control Register Tick Timer Interrupt Control RegistersTick Timer 4 Interrupt Control Register Tick Timer 3 Interrupt Control RegisterTick Timer 1 Interrupt Control Register IEN Dram Parity Error Interrupt Control RegisterIL2-IL0 IclrSCC Interrupt Control Register Tick Timer 3 Control Register Tick Timer 3 and 4 Control RegistersTick Timer 4 Control Register Dram Space Base Address Register Dram and Sram Memory Controller RegistersDram Space Size Register Sram Space Base Address RegisterDZ2 DZ0 Memory Size Dram Size Control Bit EncodingDRAM/SRAM Options Register 28F020 256K x 8 Flash memory devices are used Sram Size Control Bit EncodingF0 set to a 0 indicates that one 28F016SA 2M x 8 Flash Memory device is used. F0 set to a 1 indicates that fourSZ1 SZ0 Memory Size Sram Space Size RegisterLTO, EXT, Prty Lanc Error Status RegisterPlty 82596CA Lanc Interrupt Control RegisterLanc Bus Error Interrupt Control Register General Purpose Inputs Register Scsi Error Status RegisterV11 MVME172 Version Register Scsi Interrupt Control Register Tick Timer 3 Counter Tick Timer 3 and 4 Compare and Counter RegistersTick Timer 3 Compare Register Bus Clock Register Tick Timer 4 Compare RegisterTick Timer 4 Counter At 25 MHz where N = At 33 MHz where N = Prom Access Time Control RegisterET2 Prom Access = N FT2 Flash Access = N Flash Access Time Control RegisterAbort Switch Interrupt Control Register Reset Switch Control Register Watchdog Timer Control Register Bit Time-out Encoding Access and Watchdog Time Base Select RegisterWdto These bits define the watchdog time-out period Dram Control Register Alternate MPU Status RegisterPAREN-PARINT Clock tickProgramming Model Bit Prescaler Count Register IP2 Chip General Description Local Bus to IndustryPack DMA Controllers IP2 Chip Clocking Environments and Performance IP2 Chip Clock Cycles Error Reporting as a Local Bus Master Error ReportingFollowing paragraphs describe the IP2 chip error reporting Error Reporting as a Local Bus SlaveIndustryPack Error Reporting Overall Memory Map This status bit is cleared by writing a one to it This bit is readable and writableRegister Register Name Register Bit Names Offset IP2 Chip Memory Map Control and Status RegistersDMA Rotat Dint Dien Diclr Chani TBL $5B DMAc LB Dmac for Chip Revision Register Chip ID RegisterVector Base Register IV2-0 Interrupt Source IPa, IPb, IPc, IPd Memory Base Address RegistersIPb Memory Base Address Registers IPa or Double Size IPab Memory Base Address RegistersIPd Memory Base Address Registers IPa, IPb, IPc, IPd Memory Size RegistersIPc or Double Size IPcd Memory Base Address Registers Not used on 200/300-Series MVME172BIT NAME$0C When this bit is high, an interrupt is being generated for Corresponding INT status bit. In level-sensitive modeWhen IEN is set, the interrupt is enabled. When IEN is Cleared, the interrupt is disabledMEN IPa, IPb, IPc, and IPd General Control RegistersBTD Memory Space Data Width DERR AERRBERR CERRIP32 Setting IP32 to a one enables the IndustryPack bus toSetting it to a zero will enable 8 MHz operation. In this IP Clock RegisterLocal bus. If Rotat is set to a one, the priority is fixed Where each Dmac has equal access to the MC68060DMA Arbitration Control Register RES IP Reset RegisterProgramming the DMA Controllers Control Word Byte Count DMA Control and Status Register Set Definition DMA Enable FunctionIpto DMA Status RegisterDint IpendDIL2-DIL0 DienDEN DMA Control Register Adma Ento ToipDMA Local Bus Address Counter DmaeiDMA Byte Counter DMA IndustryPack Address CounterDMA Table Address Counter IRE Programming the Programmable ClockProgrammable Clock Interrupt Control Register IL2-0CLR Programmable Clock General Control RegisterPS2-0 PLS Programmable Clock Timer RegisterComments Local Bus to IndustryPack AddressingBit Memory Space Local Bus to IndustryPack Addressing $00FFFFFB $7FFFFD IPA6-0 Comments IPa I/O SpaceIPab I/O Space IPA5-0 Comments IPa ID SpaceThis section shows data routing from an IP to the local bus Memory Space AccessesIP to Local Bus Data Routing IP to Local Bus Data Routing Space Lbsize LBA IPA ID Space AccessesMcecc FeaturesPerformance Descriptions Specifications Mcecc SpecificationsCycle Types ECCDouble Bit Error Cycle Type = Burst Read or Non-Burst Read Error ReportingSingle Bit Error Cycle Type = Burst Read or Non-Burst Read Single Bit Error Cycle Type = Scrub Single Bit Error Cycle Type = Non-Burst WriteDouble Bit Error Cycle Type = Non-Burst Write Triple or Greater Bit Error Cycle Type = Non-Burst WriteScrub Error LoggingDouble Bit Error Cycle Type = Scrub Triple or Greater Bit Error Cycle Type = ScrubArbitration Chip DefaultsRefresh Programming Model Offset Name Mcecc Internal Register Memory Map, PartMcecc Base Address = $FFF43000 1st $FFF43100 2nd RegisterBase BAD31 BAD30 BAD29 BAD28 BAD27 BAD26 BAD25 BAD24 Address D31 D30 D29 D28 D27 D26 D25 D24 Register Bit NamesScrub SAC7 SAC6 SAC5 SAC4 Addr Cntr 1st $FFF43000/2nd $FFF43100 8-bits MSIZ2-MSIZ0 Memory Configuration RegisterRB4 Read Bit 4 is a read only bit that is always Dummy RegisterRB3 Read Bit 3 is a read only bit that is always Bit assignments for the Base Address Register are Base Address RegisterDifference from MEMC040 none RWB3 Read/Write Bit 3 is a general purpose read/write bit Bit assignments for the Dram Control Register areRWB5 Read/Write Bit 5 is a general purpose read/write bit Bclk Frequency Register Data Control Register Mcecc Scrub Control Register This register contains bits 7-0 of the Scrub Period Register Scrub Period Register BitsSTOFF2-STOFF0 Chip Prescaler CounterScrub Time On/Time Off Register Scrubber Time On STON2-STON0Scrubber Time Off Scrub Prescaler Counter Bits Scrub Timer Counter Bits Scrub Address Counter Bits 1st $FFF4304C/2nd $FFF4314C 8-bits Error Logger Register Error Address Bits 1st $FFF43064/2nd $FFF43164 8-bits RSIZ2-RSIZ0 Error Syndrome RegisterDefaults Register Register Base Address SELI1, SELI0Dram Array Size Nocache RESST2-RESST0Initialization Mcecc Syndrome Decode Bank in Error Bit in Error Syndrome CodeBank C Bank a Mcecc Document Title Motorola Publication Number Motorola Computer Group DocumentsTable A-2. Manufacturers’ Documents Literature UpdatesManufacturers’ Documents Table A-2. Manufacturers’ Documents Related Documentation VMEchip2 Tick Timer 1 Periodic Interrupt Example BUsing Interrupts on the MVME172Refer to the Vector Base Register Step Register and Address Action and ReferenceUsing Interrupts on the MVME172 Page Index IN-2 DMA Gcsr Lanc IN-6 MPU SCC Scsi Mcecc IN-10 IN-11 Index MVME172 MVME172 Programmer’s Reference Guide