Maxtor 546106, 51536H2, 52049H3 Pin Description Table, PIN Name Signal Name Signal Desc Ription

Page 27

AT INTERFACE DESCRIPTION

Pin Description Table

PIN NAME

PIN

I/O

SIGNAL NAME

SIGNAL DESC RIPTION

 

 

 

 

 

RESET -

01

I

Hos t Reset

Reset signal from the host s ystem. Active during power up and inactive after.

 

 

 

 

 

D D0

17

I/O

Host Data Bus

16 bit bi-directional data bus between host and drive. Lower 8 bits used for

 

 

 

 

register and EC C byte transfers. All 16 bits us ed for data transfers.

 

 

 

 

 

D D1

15

I/O

 

 

 

 

 

 

 

D D2

13

I/O

 

 

 

 

 

 

 

D D3

11

I/O

 

 

 

 

 

 

 

D D4

09

I/O

 

 

 

 

 

 

 

D D5

07

I/O

 

 

 

 

 

 

 

D D6

05

I/O

 

 

 

 

 

 

 

D D7

03

I/O

 

 

 

 

 

 

 

D D8

04

I/O

 

 

 

 

 

 

 

D D9

06

I/O

 

 

 

 

 

 

 

DD 10

08

I/O

 

 

 

 

 

 

 

D D11

10

I/O

 

 

 

 

 

 

 

DD 12

12

I/O

 

 

 

 

 

 

 

DD 13

14

I/O

 

 

 

 

 

 

 

DD 14

16

I/O

 

 

 

 

 

 

 

DD 15

18

I/O

 

 

 

 

 

 

 

D MARQ

21

O

DM A Request

This signal is used with DM AC K for D MA transfers . By asserting this s ignal, the

 

 

 

 

drive indicates that data is ready to be transfered to and from the host.

DIOW -

23

I

Host I/O Write

Rising edge of Write strobe clock s data from the hos t data bus to a register on

STOP

 

 

 

the drive.

D IOR -

25

I

Host I/O Read

Read strobe enables data from a register on the drive onto the host data bus.

HD MARDY

 

 

 

DMA ready during UltraDMA data in bursts.

-

 

 

 

Data strobe during UltraDMA data out bursts.

HSTROBE

 

 

 

 

 

 

 

 

 

IORDY

27

O

I/O C hannel Ready

This signal may be driven low by the drive to insert wait states into host I/O

DD MARDY

 

 

 

cycles.

-

 

 

 

D MA ready during UltraDMA data out bursts.

DSTROBE

 

 

 

D ata strobe during UltraDMA data in bursts.

CSEL

28

 

C able Select

Us ed for Mas ter/Slave selection via cable. Requires s pecial cabling on host

 

 

 

 

s ystem and installation of C able Select jumper.

 

 

 

 

 

D MACK -

29

I

D MA Acknowledge

This signal is used with DM ARQ for D MA transfers . By asserting this s ignal, the

 

 

 

 

host is ac knowledging the receipt of data or is indicating that data is available.

 

 

 

 

 

INTRQ

31

O

Hos t Interrupt

Interrupt to the host asserted when the drive requires attention from the host.

 

 

 

Request

 

IOC S16

32

 

D evice 16 bit I/O

Obsolete

 

 

 

 

 

PD IAG -

34

I/O

Pas sed D iagnostic

Output by drive when in Slave mode; Input to drive when in Master mode.

 

 

 

 

 

DA0

35

I

Hos t Address Bus

3 bit binary address from the host to selec t a regis ter in the drive.

 

 

 

 

 

DA1

33

I

 

 

 

 

 

 

 

DA2

36

I

 

 

 

 

 

 

 

C S0 -

37

I

Host Chip Select 0

C hip selec t from the host used to access the C omm and Block registers in the

 

 

 

 

drive. This signal is a decode of I/O addres ses 1F0 - 1F 7 hex.

 

 

 

 

 

C S1 -

38

I

Host Chip Select 1

Chip select from the host used to access the Control registers in the drive. This

 

 

 

 

signal is a decode of I/O addres ses 3F6 - 3F 7 hex.

DASP -

39

I/O

Drive Active/D rive

Time-multiplexed, open collector output which indicates that a drive is active, or

 

 

 

1 Present

that

 

 

 

 

device 1 is pres ent.

 

 

 

 

 

GND

02

N/A

Ground

Signal ground.

 

 

 

 

 

 

19

 

 

 

 

 

 

 

 

 

22

 

 

 

 

 

 

 

 

 

24

 

 

 

 

 

 

 

 

 

26

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

KEY

20

N/A

Key

Pin used for keying the interface connector.

 

 

 

 

 

5 – 2

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Page 26 Page 28
Contents Corporate Headquarters REV EC N O SEC Tion Desc Ription ATE U T I O N Before You BeginContents Handling and Installation Product SpecificationsInterface Commands AT Interface DescriptionHost Software Interface Glossary Service and SupportFigures Abbreviations IntroductionMaxtorCorporation ManualOrganizationConventions Product Description KeyFeaturesProduct Features Functional / InterfaceModel S SP T MAX LB a Apac IT Y CacheManagement MajorHDAComponents SubsystemConfiguration Jumper Location / ConfigurationCylinderLimitationJumperDescription ModelsandCapacities ProductSpecificationsDriveConfiguration PerformanceSpecificationsAram E TE R Stan D ARD ME T RIC PhysicalDimensionsmaximumEnvironmentalLimits PowerRequirementsPowerModeDefinitions EPA Energy Star ComplianceReliabilitySpecifications Shock and VibrationParam E TE R OP ER AT ING ON- OPE R AT ING EMC/EMI SafetyRegulatoryComplianceHandlingandInstallation HardDriveHandlingPrecautionsElectro-StaticDischargeESD Multi-pack Shipping Container UnpackingandInspectionRepacking PhysicalInstallationHook up Before You BeginStart up Set upPIN IGN AL InterfaceConnectorATInterfaceDescription PinDescriptionSummaryPin Description Table PIN Name Signal Name Signal Desc RiptionPIO Timing IM in G Paramet ERS ModeDMATiming Imin G Paramet ERS ModeMode 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 HostSoftwareInterface Task File RegistersPOR T EAD WR ITE Conten TS LBA Bits CommandRegister M M a N D N a M E M M a N D code PA R a M E T E R S U S E D SummaryControl Diagnostic Registers Reset and Interrupt Handling InterfaceCommands ReadCommands Read DMA WriteCommands Write Multiple ModeSet/CheckCommands VAL UE DES C RIP TionLE VE L VAL UE Omman D Timer VAL UE TIME-OUT Period PowerModeCommandsSleep Mode Or D ENT Desc Ription InitializationCommandsOr D 15- 10, as c urrently defined Initialize Drive Parameters ER ROR Code Desc Ription Seek,FormatandDiagnosticCommandsKey Register A.R.T. CommandSetSupport ServiceandSupportServicePolicy NoQuibbleServiceFrom Dial Glossary AccesstimeCorrectableerror Fetch Landingzoneorlzone Physicalsector Softerror
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