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Appendix B
B-2 Maxtor Atlas 10K III
Transfer Period Factor Field Values When PARL = 0
Table C-3 provides valid bit combinations for the QAS, DT, and IU fields of the
INQUIRY command’s Negotiated Rate Information Page (Section 5.11.2.7 of this
manual). Only the combinations shown in the table are valid; all other combinations
are reserved.
Settings for the QAS, DT, and IU Fields of the Negotiated Rate Information Page (INQUIRY
Command)
32h - FFh Transfer period = the period factor x 4 (Fast-5 data is latched using a
transfer period of less than or equal to 1020 ns and greater than or
equal to 200 ns).
00h – 09h Reserved.
0Ah Transfer period = 25 ns (Fast-40 data is latched every 25 ns).
0Bh Transfer period = 30 ns (Fast-40 data is latched every 30 ns).
OCh Transfer period = 50 ns (Fast-20 data is latched using a transfer period
of less than or equal to 96 ns and greater than or equal to 50 ns).
0Dh – 18h Transfer period = the period factor x 4 (Fast-20 data is latched using a
transfer period of less than or equal to 96 ns and greater than or equal
to 50 ns).
19h – 31h Transfer period = the period factor x 4 (Fast-10 data is latched using a
transfer period of less than or equal to 196 ns and greater than or equal
to 100 ns).
32h - FFh Transfer period = the period factor x 4 (Fast-5 data is latched using a
transfer period of less than or equal to 1020 ns and greater than or
equal to 200 ns).
0 0 0 Selects Single Transition phases. Use ST DATA IN and ST DATA
OUT phases to transfer data
0 1 0 Use DT DATA IN and DT DATA OUT phases with data group
transfers.
0 1 1 Use DT DATA IN and DT DATA OUT phases with information unit
transfers.
1 1 1 Use DT DATA IN and DT DATA OUT phases with information unit
transfers and use QAS for arbitration.