Maxtor 90750D3, 91024D4, 91280D5 manual Ultra DMA Timing, Timing Parameters all times in nanoseconds

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AT INTERFACE DESCRIPTION

Ultra DMA Timing

TIMING PARAMETERS (all times in nanoseconds)		MODE 0		MODE 1		MODE 2

		MIN	MAX	MIN	MAX	MIN	MAX
t	Cycle Time (from STROBE edge to STROBE edge)	114		75		55
CYC
t2	Two cycle time (from rising edge to next rising edge or	235		156		117
CYC	from falling edge to next falling edge of STROBE)	235		156		117
	from falling edge to next falling edge of STROBE)
t	Data setup time (at recipient)	15		10		7	70
DS
t	Data hold time (at recipient)	5		5		5
DH
t	Data valid setup time at sender (time from data bus being	70		48		34	5
DVS	valid until STROBE edge)	70		48		34	5
	valid until STROBE edge)
t	Data valid hold time at sender (time from STROBE edge	6		6		6	20
DVH	until data may go invalid)	6		6		6	20
	until data may go invalid)

t	First STROBE (time for device to send first STROBE)	0	230	0	200	0	170
FS
t	Limited interlock time (time allowed between an action by
LI	one agent, either host or device, and the following action	0	150	0	150	0	150
	one agent, either host or device, and the following action	0	150	0	150	0	150
	by the other agent)

t	Interlock time with minimum	20		20		20
MLI
t	Unlimited interlock time	0		0		0
UI
t	Maximum time allowed for outputs to release		10		10		10
AZ
t	Minimum delay time required for output drivers turning on	20		20		20
ZAH	Minimum delay time required for output drivers turning on
t	(from released state)	0		0		0
ZAD
t	Envelope time (all control signal transitions are within the	20	70	20	70	20	70
ENV	DMACK envelope by this much time)	20	70	20	70	20	70
	DMACK envelope by this much time)
t	STROBE to DMARDY (response time to ensure the		50		30		20
SR	synchronous pause case when the recipient is pausing)		50		30		20
	synchronous pause case when the recipient is pausing)

t	Ready-to-final-STROBE time (no more STROBE edges may		75		60		50
RFS	be sent this long after receiving DMARDY- negation)		75		60		50
	be sent this long after receiving DMARDY- negation)

t	Ready-to-pause time (time until a recipient may assume	160		125		100
RP	that the sender has paused after negation of DMARDY-)	160		125		100
	that the sender has paused after negation of DMARDY-)

t	Pull-up time before allowing IORDY to be released		20		20		20
IORDYZ
t	Minimum time device shall wait before driving IORDY	0		0		0
ZIORDY
t	Setup and hold times before assertion and negation of	20		20		20
ACK	DMACK-	20		20		20
	DMACK-
t	Time from STROBE edge to STOP assertion when the	50		50		50
SS	sender is stopping	50		50		50
	sender is stopping

DMARQ
(device)
tUI
DMACK-
(host)
tACK	tFS
tACK	tENV
STOP	tZAD
STOP
(host)
tACK	tFS
tACK	tENV
HDMARDY-
(host)	tZAD
	tZAD
tZIORDY
DSTROBE
(device)
tAZ	tVDS	tDVH
DD(15:0)
tACK
DA0, DA1, DA2,
CS0-, CS1-
	Figure 5 - 4

Initiating an Ultra DMA Data In Burst

5 – 26

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Contents HA RD Drive Produc T MA Nual DiamondMax Plus Revisions Manual No U T I O N Before You BeginContents Handling and Installation Product SpecificationsHost Software Interface AT Interface DescriptionService and Support Interface CommandsGlossary Figures Maxtor Corporation IntroductionManual Organization AbbreviationsConventions Signal ConventionsKey Words NumberingProduct Description DiamondMax Plus 5120 Key FeaturesFunctional / Interface Product FeaturesLogical Block Addressing On-the-Fly Hardware Error Correction Code ECCDefect Management Zone DMZ Software ECC CorrectionCache Management Read-Ahead ModeBuffer Segmentation Automatic Write Reallocation AWRMajor HDA Components Jumper Location/Configuration Subsystem ConfigurationCylinder Limitation Dual Drive SupportDrive Configuration Product SpecificationsPerformance Specifications Models and CapacitiesParameter Standard Metric Physical DimensionsPower Mode Definitions Power RequirementsEPA Energy Star Compliance Environmental LimitsShock and Vibration Reliability SpecificationsRadiated Electromagnetic Field Emissions EMC Compliance Safety Regulatory ComplianceCanadian Emissions Statement Hard Drive Handling Precautions Handling and InstallationPre-formatted Drive Important NoticeMulti-pack Shipping Container Unpacking and InspectionRecommended Mounting Configuration Physical InstallationRepacking Before You Begin General Requirements Mounting Drive in System Attaching Interface Power Cables System Setup Hard Drive Preparation System Hangs During Boot Signal Interface ConnectorAT Interface Description Pin Description SummaryPin Description Table PIN Name Signal Name Signal DescriptionPIO Timing Timing Parameters ModeDMA Timing Timing Parameters all times in nanoseconds Ultra DMA TimingSustained Ultra DMA Data In Burst Device Terminating an Ultra DMA Data In Burst Initiating an Ultra DMA Data Out Burst Device Pausing an Ultra DMA Data Out Burst Device Terminating an Ultra DMA Data Out Burst Features Register Error RegisterHost Software Interface Task File RegistersSector Number Register Sector Count RegisterCylinder Number Registers Device/Head RegisterCommand Register Summary Command Name Command Code Parameters Used SDHAlternate Status Register Control Diagnostic RegistersDevice Control Register Digital Input RegisterReset Handling Reset and Interrupt HandlingInterrupt Handling Set Feature Commands Interface CommandsRead Sectors Read CommandsRead Verify Sectors Read Multiple Read DMASet Multiple Mode Write CommandsWrite Sectors Write Verify SectorsWrite DMA Write MultipleSet Features Mode Set Feature CommandsPower Mode Commands Sleep Mode Identify Drive Initialization Commands15-8 = PIO data transfer mode = Write Cache enabled Initialize Drive Parameters Execute Drive Diagnostic Seek, Format and Diagnostic CommandsFormat Track Execute S.M.A.R.T A.R.T. Command SetService Policy Service and SupportNo Quibble Service SupportCustomer Service MaxFax ServiceInternet Glossary Direct Memory Access Direct AccessError Correction Code ECC Error FreeHead Disk Assembly HDA Hard ErrorFile Allocation Table FAT Flux Changes PER InchLogical Address Phase Locked Loop PLLLogical Block Addressing Logical SectorRead Gate Signal Random Access Memory RAMRecoverable Error Sector Pulse SignalUnrecoverable Error UN-CORRECTABLE ErrorWrite Gate Signal THIN-FILM Media