Seagate Elite 9, Product Manual

Page: 76 / 82

66 Elite 9 Product Manual, Rev. C
continued from previous page
Waveform Waveform
Description symbol [1] table [1] Typical Max
Data in byte transfer (parameter) T24 4.5-12 0.04 µs
Data out byte transfer (parameter) T25 4.5-13 0.04 µs
Next data in byte access (parameter) T26 4.5-12 0.10 µs 0.12 µs
Next data out byte access (parameter) T27 4.5-13 0.10 µs 0.12 µs
Data in byte transfer (media) [2] T28 4.5-12 0.03 µs 0.04 µs
Data out byte transfer (media) [2] T29 4.5-13 0.03 µs 0.04 µs
Next data in byte access (media) [2] T30 4.5-12 0.10 µs 0.12 µs
Next data out byte access (media) [2] T31 4.5-13 0.10 µs 0.12 µs
MSG IN byte transfer T32 4.5-5,7 0.09 µs 0.04 µs
4.5-8,14,15
MSG OUT byte transfer T33 4.5-2 0.04 µs
STATUS byte transfer T34 4.5-5,8 0.04 µs
4.5-15
Synchronous data transfer characteristics:
Request signal transfer period [3] – – various 800 ns
Notes:
[1] See the SCSI-2 Interface Product Manual (part number 77738479), Section 4.5.
[2] Maximum SCSI asynchronous interface transfer rate is 10 Mbytes/sec for non-wide SCSI and
20 Mbytes/sec for wide SCSI as shown in Section 5.3.
[3] Synchronous transfer period is determined by negotiations between an initiator and a drive. The
drive is capable of setting periods as given in Section 11.5 in this manual. See also Sections
3.1.5.2 and 3.5.3.2 of the
SCSI-2 Interface Product Manual for a description of synchronous
data transfer operation.
General timing diagrams for SCSI interface operation are shown in the
SCSI-2 Interface Product
Manual, Section 4.5.