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Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F
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11.5
Synchronous data transfer
11.5.1
Synchronous data transfer periods supported
Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer
period to be used by the drive and the initiator is established by an exchange of messages during the Mes-
sage Phase of operation. See the section on message protocol in the SCSI Interface manual.*
M (Decimal)
25
31
37
50
62
75
87
100
11.5.2
REQ/ACK offset
The maximum REQ/ACK offset supported by the ST15230 family is 15 (0Fh).
11.6
Physical interface
Figure 11.6-1 shows the locations of the physical interface components for the drive. Shown are the locations
of the D.C. power connector, the SCSI interface connector, the I/O line terminators, and the drive select and
option select header.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the SCSI
operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual,
P/N 77738479.
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*SCSI Interface Product Manual, P/N 77738479
Table 11.5-1. Synchronous data transfer periods
Transfer Period (M times 4 nanoseconds)
100
125
150
200
250
300
350
400
41
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