Maxtor VL 17 manual Ultra DMA Timing, Mode MIN MAX

Page 37

AT INTERFACE DESCRIPTION

Ultra DMA Timing

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

		MIN	MAX	MIN	MAX	MIN	MAX

tCYC	Cycle Time (from STROBE edge to STROBE edge)	114		75		55
t2CYC	Two cycle time (from rising edge to next rising edge or	235		156		117
	from falling edge to next falling edge of STROBE)
tDS	Data setup time (at recipient)	15		10		7	70
tDH	Data hold time (at recipient)	5		5		5
tDVS	Data valid setup time at sender (time from data bus being	70		48		34	5
	valid until STROBE edge)
tDVH	Data valid hold time at sender (time from STROBE edge	6		6		6	20
	until data may go invalid)
tFS	First STROBE (time for device to send first STROBE)	0	230	0	200	0	170
tLI	Limited interlock time (time allowed between an action by	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)
tMLI	Interlock time with minimum	20		20		20
tUI	Unlimited interlock time	0		0		0
tAZ	Maximum time allowed for outputs to release		10		10		10
tZAH	Minimum delay time required for output drivers turning on	20		20		20
tZAD	(from released state)	0		0		0
tZAD		0		0		0
tENV	Envelope time (all control signal transitions are within the	20	70	20	70	20	70
	DMACK envelope by this much time)
tSR	STROBE to DMARDY (response time to ensure the		50		30		20
	synchronous pause case when the recipient is pausing)
tRFS	Ready-to-final-STROBE time (no more STROBE edges may		75		60		50
	be sent this long after receiving DMARDY- negation)
tRP	Ready-to-pause time (time until a recipient may assume	160		125		100
	that the sender has paused after negation of DMARDY-)
tIORDYZ	Pull-up time before allowing IORDY to be released		20		20		20
tZIORDY	Minimum time device shall wait before driving IORDY	0		0		0
tACK	Setup and hold times before assertion and negation of	20		20		20
	DMACK-
tSS	Time from STROBE edge to STOP assertion when the	50		50		50
	sender is stopping

DMARQ
(device)
tUI
DMACK-
(host)
tACK	tENV
STOP
(host)
tACK	tENV
HDMARDY-
(host)
tZIORDY
DSTROBE
(device)
tAZ
DD(15:0)
tACK
DA0, DA1, DA2,
CS0-, CS1-

tFS

tZAD
tFS
tZAD
tVDS	tDVH

Figure 5 - 4

Initiating an Ultra DMA Data In Burst

5 – 5

Image 37

Contents

HA RD Drive Produc T MA Nual DiamondMaxVL REV EC no Section Description Date 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 VL 17 Key FeaturesFunctional / Interface Product FeaturesLogical Block Addressing On-the-Fly Hardware Error Correction Code ECCDefect Management Zone DMZ Cache Management Major 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 Tools for Installation Handling PrecautionsSystem Requirements Drive Identification InformationHard Drive Identification General RequirementsInstalling 5.25-inch Mounting Brackets and Rails Systems Using Cable SelectInstalling in a Device Bay Mounting Drive in SystemAttaching System Cables Attaching Interface and Power CablesSetting the Bios Cmos System SetupBios Cmos Parameters Hard Drive Preparation System Hangs During Boot PIN Signal Interface ConnectorAT Interface Description Pin Description Summary Pin Description Table PIN Name Signal Name Signal DescriptionPIO Timing Timing Parameters ModeDMA Timing Ultra DMA Timing Mode MIN MAXSustained 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 Timer Value TIME-OUT Period Command Name Command Code Parameters UsedSummary Alternate 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 CommandsValue Description Power Mode Commands Sleep Mode Word Content Description Initialization CommandsIdentify Drive 15-8 = PIO data transfer mode = Write Cache enabled Initialize Drive Parameters Execute Drive Diagnostic Seek, Format and Diagnostic CommandsError Code Description Format TrackExecute S.M.A.R.T A.R.T. Command SetService Policy Service and SupportNo Quibble Service SupportCustomer Service MaxFax ServiceInternet Glossary Access TimeCylinder Zero Gigabyte GB Logical Block Addressing Read Gate Signal THIN-FILM Media