Negotiated Rate Information; Transfer Period Factor Field - Maxtor ATLAS 10K IV User Manual

NEGOTIATED RATE INFORMATION

This appendix provides information about the INQUIRY command's Negotiated
Rate Information Page that is not provided in Section 5.11.2.7. Specifically, it
provides the codes and meanings for the Transfer Period Factor field (byte 4) and a
table that explains the allowable settings for the QAS, DT, and IU fields (bits 2, 1,
and 0, respectively, of byte 7).
B.1

TRANSFER PERIOD FACTOR FIELD

Table B-1 provides the codes and meanings allowed for the Transfer Period Factor
field if the value of PARL (Parallel Protocol, bit 2 of byte 6 of the Negotiated Rate
Information Page) is 1.
Table B-2 provides the allowable codes when the value of PARL = 0.
Table B-1 Transfer Period Factor Field Values When PARL = 1
Code
00h – 08h
09h
0Ah
0Bh
OCh
0Dh – 18h
19h – 31h
32h - FFh
PRELIMINARY 02/19/03
Reserved.
Transfer period = 12.5 ns (Fast-80 is latched every 12.5 ns). This code is valid only
if the protocol options bits (QAS, DT, and IU) of the page have values selected that
support double transition (DT) data transfers.
Transfer period = 25 ns (Fast-40 data is latched every 25 ns).
Transfer period = 30 ns (Fast-40 data is latched every 30 ns).
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).
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).
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).
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).
Appendix B
PAGE REFERENCE
Description
Maxtor Atlas 10K IV B-1