Bit Prescaler Count Register | Motorola MVME172 instruction

3

MC2 Chip

32-bit Prescaler Count Register

The prescaler register is used to clock timing functions in the MC2 chip. The lower 8 bits of the prescaler is programmed to generate an output with a one microsecond period. Refer to the section on the LSB Prescaler Count Register under Programming the Tick Timers in this chapter. The upper 24 bits are used to clock the local bus access timer and watchdog timer. To facilitate testing, the upper 24 bits can be written to. Writes to this register must be 32 bits.

ADR/SIZ	$FFF4204C (32 bits)

BIT	31 . . . 8	7-0

NAME	MSB	LSB

OPER	R/W	R

RESET	0 P

LSB7-0The least significant bits of the 32-bit prescaler. These bits are read only. They are duplicated in the memory map in the MC2 chip at $FFF42014.

MSB31-8The most significant bits of the prescaler.

Note that for the "No VMEbus Interface" option, the 32- bit Prescaler Count Register is located at $FFF40064 in addition to $FFF4204C. This means that this register is located at the same address ($FFF40064) on an MVME172 with the VMEchip2 as well as an MVME172 without the VMEchip2. This feature is provided for those applications which require a Prescaler Count Register to run on all MVME172 versions.

3-48	Computer Group Literature Center Web Site

Image 236

Motorola MVME172 manual Bit Prescaler Count Register

Contents

MVME172 VME Embedded Controller Programmer’s Reference Guide Restricted Rights Legend Preface Recent Updates Page Page Contents VMEchip2 Page Page MC2 Chip Xii IP2 Chip Chapter Mcecc Index Figures Xvii Xviii Introduction Overview Board 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 Block Diagram 500-Series MVME172 Redundant Functions in the VMEchip2 and MC2 Chip VMEchip2 MC2 Chip Address Bit # Memory Maps VMEbus Interface and VMEchip2Local Bus Memory Map Normal Address Range 300-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 Address Range Devices Accessed Port Size Width 300-Series MVME172 Local I/O Devices Memory Map $FFFBC000 $FFFBC01F $FFFBC800 $FFFBC81F Memory Maps 500-Series MVME172 Local I/O Devices Memory Map Address Range Device Port Size Width 2KB $FFFBC800 $FFFBC81F Board Description and Memory Maps Detailed I/O Memory Maps Tables 1-7 through 1-17 give the detailed memory maps for VMEchip2 Memory Map Sheet 1 Offset This sheet begins on facing VMEchip2 Memory Map Sheet 2 PRE Compare Register Counter Overflow VMEchip2 Memory Map Sheet 3 Offsets Bit Numbers Offset D31-D24 D23-D16 D15-D8 D7-D0 MC2 Chip Register MapMC2 Chip Base Address = $FFF42000 IP2 Chip Overall Memory Map Address Range Selected Device Port Width Size 10. IP2 Chip Memory Map Control and Status Registers IP2 Chip Base Address = $FFFBC000 DMA Dlbe Chani TBL $51 DMAc INT Dlbe Ipend Chani TBL Ipto Done 11. Mcecc Internal Register Memory Map Mcecc Base Address = $FFF43000 1st $FFF43100 2nd Name D31 D30 D29 D28 D27 D26 D25 D24 12. Z85230 SCC Register Addresses Z85230 SCC Register Address 13 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 16. Bbram Configuration Area Memory Map Local Scsi ID Address Data Bits Function 17. TOD Clock Memory MapFT = Frequency Test x = Must be set to Ecc1memserial 12 characters are followed by four blanks 3992B03A VMEbus Memory Map Interrupt Acknowledge Map VMEbus Accesses to the Local Bus Software Support ConsiderationsInterrupts VMEbus Short I/O Memory Map Local Bus Time-out Cache CoherencySources of Local Berr VMEbus Access Time-out Local Dram Parity ErrorBus Error Processing VMEbus Berr Description of Error Conditions on the MVME172 MPU Parity Error MPU Local Bus Time-out MPU Off-board ErrorMPU TEA Cause Unidentified Dmac VMEbus Error Dmac Parity Error Dmac Off-board Error Dmac LTO Error LAN Parity Error Dmac TEA Cause Unidentified LAN Off-Board Error LAN LTO Error Scsi 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 Summary of Major Features VMEchip2 VMEchip2 Introduction Functional Blocks Local Bus to VMEbus Interface VMEchip2 Block Diagram VMEchip2 Local Bus to VMEbus Requester VMEchip2 VMEbus to Local Bus Interface Functional Blocks Local Bus to VMEbus DMA Controller Functional Blocks No Address Increment DMA Transfers Dmac VMEbus Requester Tick and Watchdog Timers Prescaler Tick Timers Watchdog Timer VMEbus Interrupter Bus Timer VMEbus System ControllerArbiter Iack Daisy-Chain Driver Reset Driver Local Bus Interrupter and Interrupt Handler Functional Blocks Lcsr Programming Model Global Control and Status Registers Summary 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 Ending Address Register VMEbus Slave Starting Address Register VMEbus Slave Address Translation Address Offset Register VMEbus Slave Address Translation Select Register Segment Address Translation Size Select Value $FFF4000C 16 bits SNP2 VMEbus Slave Write Post and Snoop Control RegisterWP2 VMEbus Slave Address Modifier Select Register DATPGM BLK SUP A32USR ADDER1 WP1SNP1 When this bit is high, the first map decoder responds to Block access cyclesA24 access cycles Cycles A32 access cycles VMEbus supervisory access cycles. When this bit is lowProgramming the Local Bus to VMEbus Map Decoders Bit is low, the first map decoder does not respond to VMEchip2 Local Bus Slave VMEbus Master Ending Address Register Local Bus Slave VMEbus Master Starting Address Register $FFF4001C 16 bits $FFF40024 16 bits Local Bus Slave VMEbus Master Attribute Register D16 Segment defined by map decoder 3. When this bit is Decoder 3. Because the local bus to VMEbus interface Segment defined by map decoder 2. When this bit is Bus map decoderDecoder 2. Since the local bus to VMEbus interface does Not support block transfers, the block transfer address Segment defined by map decoder 1. When this bit is Decoder 1. Because the local bus to VMEbus interface VMEbus Slave Gcsr Group Address Register VMEbus Slave Gcsr Board Address Register Local Bus to VMEbus Enable Control Register EN1EN2 EN3 Local Bus to VMEbus I/O Control Register I2WP I2EN Programming the VMEchip2 DMA Controller Entry Function Dmac Command Table FormatDmac Registers Prom Decoder, Sram and DMA Control Register SramsTblsc ROM0 Local Bus to VMEbus Requester Control Register LvreqlLvrwd Lvfair DHB Robn Dfair DtblDEN Dhalt Tvme LincVinc SNP VME AM Dmac VMEbus Address Counter Dmac Local Bus Address CounterDmac VMEbus Address Counter Dmac Byte Counter Table Address CounterVMEbus Interrupter Control Register Irql IrqsIrqc IRQ1S VMEbus Interrupter Vector Register MPU Status and DMA Interrupt Count Register Dmac Status Register DoneVME TBL Programming the Tick and Watchdog Timers VMEbus Arbiter Time-out Control Register Vgto Time on Lbto Vato Prescaler Control Register Prescaler register = 256 B clock MHz Tick 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 Tick Timer 1 Control Register Prescaler Counter Programming the Local Bus Interrupter Local Bus Interrupter Summary Interrupt Vector Priority for Simultaneous Interrupts Dmac Local Bus Interrupter Status Register bits LM0 LM1SIG0 SIG1 SW0 SW1SW2 SW3 VME1 VME2VME3 VME4 Local Bus Interrupter Enable Register bits ELM0 ELM1ESIG0 ESIG1 ESW0 ESW1ESW2 ESW3 EIRQ1 EIRQ2EIRQ3 EIRQ4 Software 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 Vector Base Register VBR Control 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 Miscellaneous Control Register Enint 100 Computer Group Literature Center Web Site Gcsr Programming Model 102 Computer Group Literature Center Web Site Programming the Gcsr Gcsr Programming Model Local Bus Shows a summary of the GcsrVMEchip2 Memory Map Gcsr Summary VMEchip2 LM/SIG Register VMEchip2 Revision RegisterVMEchip2 ID Register LM2 LM3 VMEchip2 Board Status/Control RegisterISF RST General Purpose Register Local Bus $FFF40110/VMEbus $XXY8 16 bits Local Bus $FFF40118/VMEbus $XXYC 16 bits MC2 Chip MC2 Chip Initialization Flash and Prom Interface MPU Port and MPU Channel Attention Bbram Interface82596CA LAN Interface Lanc Bus Error MC68060-Bus Master Support for 82596CA 53C710 Scsi Controller Interface Sram Memory ControllerNON-ECC Dram Memory Controller Lanc Interrupt Clock Budget Operating Conditions Z85230 SCC InterfaceDram Performance Tick Timers Address Range SCC Device Number Memory Map of the MC2 Chip Registers Watchdog TimerLocal Bus Timer Memory Map of the MC2 Chip Registers Programming Model MC2 Chip ID Register MC2 Chip Revision Register General Control Register Interrupt Vector Base Register SCCIT10 Number of Z85230s Interrupt Vector Base Register Encoding Priority Interrupt Source IV3-IV0 Daisy Chain Priority Programming the Tick Timers Tick Timer 1 and 2 Compare and Counter Registers Tick Timer 2 Compare Register Tick Timer 1 Compare RegisterTick Timer 1 Counter Tick Timer 2 Counter LSB Prescaler Count Register Prescaler Clock Adjust Register Tick Timer 1 and 2 Control Registers OVF3-OVF0 Tick Timer 2 Control RegisterTick Timer 1 Control Register Tick Timer Interrupt Control Registers Tick Timer 4 Interrupt Control RegisterTick Timer 3 Interrupt Control Register Tick Timer 2 Interrupt Control Register Tick Timer 1 Interrupt Control Register Dram Parity Error Interrupt Control Register IL2-IL0Iclr IEN SCC Interrupt Control Register Tick Timer 3 Control Register Tick Timer 3 and 4 Control RegistersTick Timer 4 Control Register Dram and Sram Memory Controller Registers Dram Space Base Address Register Sram Space Base Address Register Dram Space Size Register DZ2 DZ0 Memory Size Dram Size Control Bit EncodingDRAM/SRAM Options Register Sram Size Control Bit Encoding F0 set to a 0 indicates that one 28F016SA 2M x 8 FlashMemory device is used. F0 set to a 1 indicates that four 28F020 256K x 8 Flash memory devices are used Sram Space Size Register SZ1 SZ0 Memory Size Lanc Error Status Register LTO, EXT, Prty 82596CA Lanc Interrupt Control Register Plty Lanc Bus Error Interrupt Control Register Scsi Error Status Register General Purpose Inputs Register V11 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 Flash Access Time Control Register FT2 Flash Access = N Abort 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 MPU Status Register PAREN-PARINTClock tick Alternate Programming 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 Following paragraphs describe the IP2 chip error reportingError Reporting as a Local Bus Slave Error Reporting as a Local Bus Master IndustryPack Error Reporting Overall Memory Map This bit is readable and writable This status bit is cleared by writing a one to it IP2 Chip Memory Map Control and Status Registers Register Register Name Register Bit Names Offset DMA Rotat Dint Dien Diclr Chani TBL $5B DMAc LB Dmac for Chip ID Register Chip Revision Register Vector Base Register IPa, IPb, IPc, IPd Memory Base Address Registers IV2-0 Interrupt Source IPa or Double Size IPab Memory Base Address Registers IPb Memory Base Address Registers IPa, IPb, IPc, IPd Memory Size Registers IPc or Double Size IPcd Memory Base Address RegistersNot used on 200/300-Series MVME172 IPd Memory Base Address Registers BIT NAME$0C Corresponding INT status bit. In level-sensitive mode When IEN is set, the interrupt is enabled. When IEN isCleared, the interrupt is disabled When this bit is high, an interrupt is being generated for IPa, IPb, IPc, and IPd General Control Registers MEN BTD Memory Space Data Width AERR BERRCERR DERR Setting IP32 to a one enables the IndustryPack bus to Setting it to a zero will enable 8 MHz operation. In thisIP Clock Register IP32 Local bus. If Rotat is set to a one, the priority is fixed Where each Dmac has equal access to the MC68060DMA Arbitration Control Register IP Reset Register RES Programming the DMA Controllers Control Word Byte Count DMA Enable Function DMA Control and Status Register Set Definition DMA Status Register Ipto Ipend DIL2-DIL0Dien Dint DEN DMA Control Register Adma Toip Ento Dmaei DMA Local Bus Address Counter DMA IndustryPack Address Counter DMA Byte Counter DMA Table Address Counter Programming the Programmable Clock Programmable Clock Interrupt Control RegisterIL2-0 IRE CLR Programmable Clock General Control RegisterPS2-0 Programmable Clock Timer Register PLS Comments Local Bus to IndustryPack AddressingBit Memory Space Local Bus to IndustryPack Addressing $00FFFFFB $7FFFFD IPa I/O Space IPA6-0 Comments IPab I/O Space IPa ID Space IPA5-0 Comments This 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 ID Space Accesses Space Lbsize LBA IPA Features Mcecc Performance Mcecc Specifications Descriptions Specifications ECC Cycle Types Double 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 = Non-Burst Write Double Bit Error Cycle Type = Non-Burst WriteTriple or Greater Bit Error Cycle Type = Non-Burst Write Single Bit Error Cycle Type = Scrub Error Logging Double Bit Error Cycle Type = ScrubTriple or Greater Bit Error Cycle Type = Scrub Scrub Arbitration Chip DefaultsRefresh Programming Model Mcecc Internal Register Memory Map, Part Mcecc Base Address = $FFF43000 1st $FFF43100 2ndRegister Offset Name Base BAD31 BAD30 BAD29 BAD28 BAD27 BAD26 BAD25 BAD24 Address Register Bit Names D31 D30 D29 D28 D27 D26 D25 D24 Scrub SAC7 SAC6 SAC5 SAC4 Addr Cntr 1st $FFF43000/2nd $FFF43100 8-bits Memory Configuration Register MSIZ2-MSIZ0 RB4 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 Bit assignments for the Dram Control Register are RWB3 Read/Write Bit 3 is a general purpose read/write bit RWB5 Read/Write Bit 5 is a general purpose read/write bit Bclk Frequency Register Data Control Register Mcecc Scrub Control Register Scrub Period Register Bits This register contains bits 7-0 of the Scrub Period Register STOFF2-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 RESST2-RESST0 Nocache Initialization Mcecc Bank in Error Bit in Error Syndrome Code Syndrome Decode Bank C Bank a Mcecc Motorola Computer Group Documents Document Title Motorola Publication Number Table A-2. Manufacturers’ Documents Literature UpdatesManufacturers’ Documents Table A-2. Manufacturers’ Documents Related Documentation BUsing Interrupts on the MVME172 VMEchip2 Tick Timer 1 Periodic Interrupt Example Step Register and Address Action and Reference Refer to the Vector Base Register Using Interrupts on the MVME172 Page Index IN-2 DMA Gcsr Lanc IN-6 MPU SCC Scsi Mcecc IN-10 IN-11 Index MVME172 Programmer’s Reference Guide MVME172