Seagate ST3660A Product Manual - Page 33

Multiword DMA active

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Medalist XE Family Product Manual, Rev. B 25 Word Description Value 57-58 Number of sectors (current See Section 1. emulation mode) 59 60-61 62 Current multiple sector setting 01xxH LBA total sectors 3,295 532,700D 3,660 1,065,046D Single-word DMA active; modes supported 0000H 63 Multiword DMA active; modes supported 0103H Advanced PIO modes 64 supported (Mode 3 supported) 0001H 65 Minimum multiword DMA 96H transfer cycle time per word (150 nsec) Recommended multiword 016BH (363 nsec) 66 DMA transfer cycle time per word 67 Minimum PIO cycle time 016BH (363 nsec) without IORDY flow control 68 Minimum PIO cycle time with IORDY2 00B4H (180 nsec) 69-127 ATA reserved 128-159 Seagate reserved 160-255 ATA reserved 0000H xxxxH 0000H 2. Cycle times less than 363 nsec require IORDY.

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Word
Description
Value
57–58
Number of sectors (current
emulation mode)
See Section 1.
59
Current multiple sector setting
01
xx
H
60–61
LBA total sectors
3,295
532,700
D
3,660 1,065,046
D
62
Single-word DMA active;
modes supported
0000
H
63
Multiword DMA active;
modes supported
0103
H
64
Advanced PIO modes
supported (Mode 3
supported)
0001
H
65
Minimum multiword DMA
transfer cycle time per word
96
H
(150 nsec)
66
Recommended multiword
DMA transfer cycle time per
word
016B
H
(363 nsec)
67
Minimum PIO cycle time
without IORDY flow control
016B
H
(363 nsec)
68
Minimum PIO cycle time with
IORDY
2
00B4
H
(180 nsec)
69–127
ATA reserved
0000
H
128–159
Seagate reserved
xxxx
H
160–255
ATA reserved
0000
H
2.
Cycle times less than 363 nsec require IORDY.
Medalist XE Family Product Manual, Rev. B
25