U4 Family Product Manual, Rev. D

27

 

 

 

 

 

Word

Description

Value

 

 

 

 

 

 

 

 

 

63

Multiword DMA active and modes

xx07H

 

 

supported (see note following this

 

 

 

table)

 

 

 

 

 

 

64

Advanced PIO modes supported

0003H

 

 

(modes 3 and 4 supported)

 

 

 

 

 

 

65

Minimum multiword DMA transfer

0078H

 

 

cycle time per word (120 nsec)

 

 

 

 

 

 

66

Recommended multiword DMA

0078H

 

 

transfer cycle time per word (120

 

 

 

nsec)

 

 

 

 

 

 

67

Minimum PIO cycle time without

00F0H

 

 

IORDY flow control (240 nsec)

 

 

 

 

 

 

68

Minimum PIO cycle time with IORDY

0078H

 

 

flow control (120 nsec)

 

 

 

 

 

69–74

ATA-reserved

0000H

 

 

 

 

 

75

Queue depth

0000H

 

 

 

 

 

76–79

ATA-reserved

0000H

 

 

 

 

 

80

Major version number

001EH

 

 

 

 

 

81

Minor version number

0000H

 

 

 

 

 

82

Command sets supported

346BH

 

 

 

 

 

83

Command sets supported

4001H

 

 

 

 

 

84

Command sets support extension

4000H

 

 

 

 

 

85

Command sets enabled

xxxxH

 

 

 

 

 

86

Command sets enabled

xxxxH

 

 

 

 

 

87

Command sets enable extension

xxxxH

 

 

 

 

 

88

Ultra DMA support and current mode

001FH

 

 

(see note following this table)

 

 

 

 

 

 

89

Security erase time

0000H

 

 

 

 

 

90

Enhanced security erase time

0000H

 

 

 

 

 

Page 35
Image 35
Seagate ST34311A, ST32112A, ST38421A, ST36421A manual Multiword DMA active and modes