Seagate ST38421A Product Manual - Page 35

Recommended multiword DMA

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U4 Family Product Manual, Rev. D Word 63 64 65 66 67 68 69-74 75 76-79 80 81 82 83 84 85 86 87 88 89 90 Description Multiword DMA active and modes supported (see note following this table) Advanced PIO modes supported (modes 3 and 4 supported) Minimum multiword DMA transfer cycle time per word (120 nsec) Recommended multiword DMA transfer cycle time per word (120 nsec) Minimum PIO cycle time without IORDY flow control (240 nsec) Minimum PIO cycle time with IORDY flow control (120 nsec) ATA-reserved Queue depth ATA-reserved Major version number Minor version number Command sets supported Command sets supported Command sets support extension Command sets enabled Command sets enabled Command sets enable extension Ultra DMA support and current mode (see note following this table) Security erase time Enhanced security erase time 27 Value xx07H 0003H 0078H 0078H 00F0H 0078H 0000H 0000H 0000H 001EH 0000H 346BH 4001H 4000H xxxxH xxxxH xxxxH 001FH 0000H 0000H

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U4 Family Product Manual, Rev. D
27
63
Multiword DMA active and modes
supported (see note following this
table)
xx
07
H
64
Advanced PIO modes supported
(modes 3 and 4 supported)
0003
H
65
Minimum multiword DMA transfer
cycle time per word (120 nsec)
0078
H
66
Recommended multiword DMA
transfer cycle time per word (120
nsec)
0078
H
67
Minimum PIO cycle time without
IORDY flow control (240 nsec)
00F0
H
68
Minimum PIO cycle time with IORDY
flow control (120 nsec)
0078
H
69–74
ATA-reserved
0000
H
75
Queue depth
0000
H
76–79
ATA-reserved
0000
H
80
Major version number
001E
H
81
Minor version number
0000
H
82
Command sets supported
346B
H
83
Command sets supported
4001
H
84
Command sets support extension
4000
H
85
Command sets enabled
xxxx
H
86
Command sets enabled
xxxx
H
87
Command sets enable extension
xxxx
H
88
Ultra DMA support and current mode
(see note following this table)
001F
H
89
Security erase time
0000
H
90
Enhanced security erase time
0000
H
Word
Description
Value