HP 6640C (US/CAN), 6744 (US), 6730 (US/CAN), 6657 (LA), 6649F (US/CAN) Set Features command, 0CH

Page 37

U10 Family Product Manual, Rev. A

29

9Ultra DMA mode 1 is currently active.

10Ultra DMA mode 2 is currently active.

11Ultra DMA mode 3 is currently active.

12Ultra DMA mode 4 is currently active.

Bit Word 93

131=80-conductor cable detected, CBLID above VIH 0=40-conductor cable detected, CBLID below VIL

3.1.3Set Features command

This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows:

02H

Enable write cache (default).

03H

Set transfer mode (based on value in Sector Count register).

 

Sector Count register values:

 

00H

Set PIO mode to default (PIO mode 2).

 

01H

Set PIO mode to default and disable IORDY

 

 

(PIO mode 2).

 

08H

PIO mode 0

 

09H

PIO mode 1

 

0AH

PIO mode 2

 

0BH

PIO mode 3

 

0CH

PIO mode 4 (default)

 

20H

Multiword DMA mode 0

 

21H

Multiword DMA mode 1

 

22H

Multiword DMA mode 2

 

40H

Ultra DMA mode 0

 

41H

Ultra DMA mode 1

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Contents
Product Manual Page Product Manual Page Contents ATA interface Configuring and mounting the driveFigures U10 Family Product Manual, Rev. a Introduction Specification summary table Drive Specification ST320423A Contact start-stop cycles 25C 40% relative humidity Formatted capacity Default logical geometryPhysical organization Drive Specification ST320423A, ST315323A ST310212A Physical characteristicsRecording and interface technology Seek time Power specificationsStart/stop times Power consumption Typical current profile Power Mode Typical Watts Typical Amps RMS 12VConducted noise Power-management modesVoltage tolerance Temperature gradient Environmental tolerances Ambient temperatureSleep mode Idle and Standby timersHumidity 3.1 Relative Humidity 3.2 Wet bulb temperatureAltitude ShockNonoperating vibration Operating vibrationDrive acoustics Electromagnetic susceptibility Agency certification Safety certificationReliability Electromagnetic compatibilityAustralian CE-Tick N176 FCC verificationU10 Family Product Manual, Rev. a Handling and static-discharge precautions Configuring and mounting the driveDrive as master with a non-ATA-compatible slave Jumper settings Master/slave configurationUltra ATA/66 cable Cable-select optionDrive mounting Mounting dimensions-top, side and end view ATA interface ATA interface signals and connector pinsO pins and supported ATA signals Command name Command code in hex ATA-standard commands Supported ATA commandsCommand name Identify Drive commandATA-standard power-management commands ATA-standard security commands0C5AH Word DescriptionXx07H Word Description ValueXx1FH Description if bit is set to Bit Word 0CH Set Features commandCode in Features A.R.T. Command Register 4 S.M.A.R.T. commandsA.R.T. Command Register Page
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