SCSI Description
5-82 Maxtor Atlas 10K III
The Margin Contr ol subpage (see Tabl e 5-98) contains parameters t hat set an d report
margin control values for usage between the initiator/target pair on subsequent
synchronous and paced transfers.
A MODE SELECT command will return the current settings for the initiator/target
pair. Fields that are not implemented will be reported as zero.
Margin Control Subpage (01h)
The Driv er Str ength field indicates the r elati ve amount of driv er sour ce curr ently used
by the dr iver. The Driver Streng th field affects both the strong and week driver s. A
larger value indicates more driver source current.
The Driver Precompensation field indicates the relat ive difference between the w eak
driver and the strong driver amplitudes when precom pensation is enabled. A larg er
value indic ates a larger differe nce between the weak and strong amplitudes.
The Driver Asymmet r y field indicate s the relative difference between the amplitudes
of asserted and negated signals launched from the driver. A larger value indicates a
relatively stronger asse r ted signal compared to t h e negated signal.
The Driver Sle w Rate field indi cates the r elativ e differ ence betw een the assertion and
negation magnitudes divided by the rise or fall tim e. A larger value indicates a faster
slew rate.
0 Reserved
1 Driver Strength Reserved
2Drive’s Asym metry Driver Precompensation
3Drive’s Slew Rate Reserved
4 Reserved
5 Reserved
6 Reserved
7 Vendor Specific
8 Reserved
9 Reserved
10 Reserved
11 Reserved
12 Reserved
13 Reserved
14 Reserved
15 Reserved