Appendix B
B- 2 Maxto r Atlas 10 K 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 c ombinations shown i n the t abl e a re val id; a l l ot he r combinat i ons
are reserved.
Settings for the QAS, DT, and IU Fields of th e Negotiated Rate In formation Page (INQUIRY
Command)
32 h - FFh Tran sfer peri od = t he perio d f ac t or x 4 (Fast-5 dat a i s la tch ed us i ng 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).
O Ch Tran sfer peri od = 50 ns (Fast -2 0 dat a is lat ched usin g a tra nsf er 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 (Fa st-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 l ess than or eq ual to 196 ns an d greater than or equal
to 100 ns).
32 h - FFh Tran sfer peri od = t he perio d f ac t or x 4 (Fast-5 dat a i s la tch ed us i ng 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 Us e DT DATA IN and D T DATA OUT phas es with da ta gro up
transfers.
0 1 1 Use DT DATA IN and DT DATA OUT phases with in form a tion unit
transfers.
1 1 1 Use DT DATA IN and DT DATA OUT phases with in form a tion unit
trans fer s and use QAS for arbitration .