Settings For The Qas, Dt, And Iu Fields; Table B-3 Settings For The Qas, Dt, And Iu Fields Of The Negotiated Rate Information Page (Inquiry Command - Maxtor ATLAS 10K IV User Manual

Appendix B
Table B-2 Transfer Period Factor Field Values When PARL = 0
Code
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).
B.2

Settings for the QAS, DT, and IU fields

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.
Table B-3 Settings for the QAS, DT, and IU Fields of the Negotiated Rate Information Page
QAS DT IU
0 0 0
0 1 0
0 1 1
1 1 1
B-2 Maxtor Atlas 10K IV
(INQUIRY Command)
Selects Single Transition phases. Use ST DATA IN and ST DATA OUT
phases to transfer data
Use DT DATA IN and DT DATA OUT phases with data group transfers.
Use DT DATA IN and DT DATA OUT phases with information unit trans-
fers.
Use DT DATA IN and DT DATA OUT phases with information unit transfers
and use QAS for arbitration.
Description
Description
PRELIMINARY 02/19/03