Multiword DMA data transfer, Dior-/Diow | Samsung spinpoint v40

DISK DRIVE OPERATION

6.7.3Multiword DMA data transfer

Figure 6-3 defines the timings associated with Multiword DMA transfers.

For Multiword DMA modes 1 and above, the minimum value of t0 is specified by word 65 in the IDENTIFY DEVICE parameter list. Table 6-18 defines the minimum value that shall be placed in word 65.

Devices shall power up with mode 0 as the default Multiword DMA mode.

CS0-/CS1-
		tM				tN
		tM				tN
						t0
DMARQ						tL
(See note 1)						tL
DMACK-		tI		tD	tK	tJ
(See note 2)		tI		tD	tK	tJ
(See note 2)

DIOR-/DIOW-

tE		tZ

Read

DD(15:0)

Write

DD(15:0)

NOTE −

tG tF

tG tH

1 To prevent the transmission of another word of data, the Device shall negate DMARQ within the tL specified time once DMACK- is asserted and reassert it again at a later time to resume the DMA operation. Alternatively, if the device is able to continue the transfer of data, the device may leave DMARQ asserted and wait for the host to reassert DMACK-.

2 This signal may be negated by the Host to suspend the DMA transfer in process.

3 This figure shows the transfer of two words. The actual transfer for a given assertion of DMARQ may be any number of words from one to the remaining number of words to be transferred.

Figure 6-3Multiword DMA data transfer

94	SpinPoint V40 Product Manual

Image 102

Samsung spinpoint v40, 3.5 hard disk drives manual Multiword DMA data transfer, Dior-/Diow

Contents

Spinpoint SpinPoint V40 Product Manual Table of Contents Ervo S Ystem EAD and W Rite O Perations Irmware F EaturesSmart Programming Requirements Protocol OverviewTiming 107 Maintenance PrecautionsService and Repair General Information Table of Figures Page User Definition Manual OrganizationScope Computer Message Commands and MessagesTerminology and Conventions Format C/S Reference Key Features IntroductionDescription Standards and Regulations Hardware Requirements Specification Summary Specifications Physical Specifications Logical Configurations Performance Specifications Power Requirements 28.71 Environmental Specifications SV6003H SV6014H SV8004H Reliability Specifications Mtbf POH Installation Space Requirements Unpacking Instructions MountingOrientation 2Mounting Dimensions in Millimeters Clearance 3Mounting-Screw Clearance AT-Bus Interface Connector Cable ConnectorsDC Power Connector Ventilation SpinPoint V40 Product Manual Jumper Block Configurations Options for Jumper Block Configuration Drive Installation 7DC Power Connector and AT-Bus Interface Cable Connections System Startup Procedure Parameter System Setup DC Spindle Motor Assembly Head / Disk Assembly HDABase Casting Assembly Disk Drive Operation Exploded Mechanical View Voice Coil Motor and Actuator Latch Assemblies Disk Stack AssemblyHead Stack Assembly Air Filtration System Digital Signal Process and Interface Controller Drive ElectronicsAT Disk Controller 2SID2001 AT Controller Block Diagram Host Interface Control Block Buffer Control Block Disk Control Block SpinPoint V40 Product Manual Disk ECC Control Block Power ManagementRead/Write IC Frequency Synthesizer Asymmetry Correction Circuitry ASC Time Base GeneratorAutomatic Gain Control Analog Anti-Aliasing Low Pass Filter 3Read/Write 88C5200 Servo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching Multi-burst ECC Correction Defect ManagementAutomatic Defect Allocation Smart Blank Signal Conventions Signal SummaryPhysical Interface Signal Descriptions Intrq Drive Interrupt DMACK- DMA AcknowledgeDmarq DMA Request IOCS16- Drive 16-bit I/O PDIAG- Passed Diagnostics RESET- Drive ResetIordy I/O Channel Ready SD3 SD8 SD6 SD9 SD5SD4 SD2 Drive Drive Host DIR Bit Conventions Logical InterfaceGeneral Environment SpinPoint V40 Product Manual Control Block Registers Command Block Registers2 I/O Register Address N N N A a a Drive Address Register 3F7h Control Block Register DescriptionsAlternate Status Register 3F6h Device Control Register 3F6h Error Register 1F1h Command Block Register DescriptionsFeatures Register 1F1h Data Register 1F0h Cylinder High Register 1F5h Command Register 1F7hSector Count Register 1F2h Cylinder Low Register 1F4h Status Register 1F7h BSY Drdy DWF DSC DRQ Corr IDX ERR At Command Register Descriptions Command Parameter Used SpinPoint V40 Product Manual Check Power Mode 98h, E5h Execute Device Diagnostics 90hDownload Micro Code 92h Flush Cache E7h Format Track 50hIdentify Device ECh Word Content Description Xxxx Capabilities Command set supported 95-128 0000h Reserved 129-159 Vendor specific 160-255 Idle 97h,E3h Idle Immediate 95h,E1hInitialize Device Parameters 91h Read Buffer E4h Read Long 22hwith retry, 23h without retry Read Multiple Command C4h Read Native Max Address F8h Read Sectors 20hwith retry, 21hwithout retry Read Verify Sectors 40hwith retry, 41hwithout retry Recalibrate 1xhSeek 7xh Set Features EFh Mode Normal outputs InputsLBA BSY Drdy DRQ ERR Description Set Multiple Mode C6h Sleep 99h, E6h Smart disable operation D9h Standby 96h,E2hSmart B0h Smart enable/disable attribute autosave D2h Smart enable operations D8hSmart execute off-line immediate D4h Smart read data D0h Byte Descriptions Value Definition Off-line data collection capability Smart return status DAh Smart capabilitySmart read log sector D5h Smart save attribution value D3h Write Buffer E8h Standby 96h, E2hStandby Immediate 94h, E0h Write DMA CAh Write Multiple Command C5h Write Sectors 30hwith retry, 31hwithout retry SpinPoint V40 Product Manual Reset Response Error PostingProgramming Requirements Command Error Register Status Register BBK Standby mode Power ConditionsSleep mode Idle mode Normal mode PIO Data in Commands Protocol Overview PIO Data Out Commands PIO Read CommandPIO Read Aborted Command BSY=0 DRDY=1 BSY=1 PIO Write CommandPIO Write Aborted Command BSY=0 DRQ=1 BSY=1 DRQ=0 Non-Data Commands DMA Data Transfer Commands Aborted DMA Command Initialize DMA Reset DMA Status BSY=0 BSY=1BSY=1 BSY=0 Timing Register transfers DIOR-/DIOW Write PIO timing parameters Mode PIO data transfers Addr valid See note T1 t2 DIOR-/DIOW Multiword DMA data transfer DIOR-/DIOW Multiword DMA timing parameters Mode Ultra DMA data transfer Initiating an Ultra DMA data in burst Ultra DMA data burst timing requirements 19Ultra DMA data burst timing requirements Sustained Ultra DMA data in burst 5Sustained Ultra DMA data in burst Host pausing an Ultra DMA data in burst 6Host pausing an Ultra DMA data in burst Device terminating an Ultra DMA data in burst 7Device terminating an Ultra DMA data in burst 100 Host terminating an Ultra DMA data in burst 8Host terminating an Ultra DMA data in burst Initiating an Ultra DMA data out burst 9Initiating an Ultra DMA data out burst 102 Sustained Ultra DMA data out burst 10Sustained Ultra DMA data out burst Device pausing an Ultra DMA data out burst 11Device pausing an Ultra DMA data out burst 104 Host terminating an Ultra DMA data out burst 12Host terminating an Ultra DMA data out burst Device terminating an Ultra DMA data out burst 13Device terminating an Ultra DMA data out burst 106 Maintenance Precautions Service And RepairGeneral Information