User Manual

SCSI Commands Reference Manual, Rev. J 452
www.seagate.com Parameters for direct access devices
DRIVER EMPHASIS CONTROL or C2 AMPLITUDE CONTROL (12G Mode Only) field
This field shall contain either the user input (MODE SELECT) or current (MODE SENSE) driver emphasis setting the 12G mode amplitude C2 set-
ting of the SAS transmitter. If the user input setting is out of range of the transceiver capability, the target device shall return a CHECK CONDI-
TION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN PARAMETER LIST for the MODE
SELECT command. This field shall be supported as described in Table 424. This field is changeable but not savable.
Table 424 DRIVER EMPHASIS CONTROL or C2 AMPLITUDE CONTROL (12G Mode Only)
DRIVER SLEW RATE CONTROL or C3 CONTROL (12G Mode Only) field
This field shall contain either the user input (MODE SELECT) or current (MODE SENSE) driver slew rate setting of the target device SAS phy. If the
user input setting is out of range of the transceiver capability, the target device shall return a CHECK CONDITION status with the sense key set
to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN PARAMETER LIST for the MODE SELECT command. This field shall be
supported as described in
Table 425. This field is changeable but not savable.
Table 425 DRIVER SLEW RATE CONTROL or C3 POST CURSOR CONTROL (12G mode only)
MANUFACTURER DEFINED BYTES FOR TRANSMITTER CONTROL field
The manufacturer Defined Bytes For Transmitter Control field may be used by the manufacturer who needs additional control bytes for the
transmitter. All control bytes shall accept 66h as reset code which change the control byte back to factory default setting. If the user input set
-
ting is out of range of the transceiver capability, the target device shall return a CHECK CONDITION status with the sense key set to ILLEGAL
REQUEST and the additional sense code set to INVALID FIELD IN PARAMETER LIST for the MODE SELECT command.
Value Definition
0x66 (write only)
(1.5G - 6G)
Write 66h shall reset the driver pre-emphasis setting back to factory default value.
0x00 – Range Limit
(write only)
User input for driver pre-emphasis control setting or C2 amplitude setting.
If the new user input is out of range specified in subpage 19h/E5h,
the target device shall maintain the current setting.
Read Only The current setting value shall be displayed.
Value Definition
0x66 (write only)
(1.5G - 6G)
Write 66h shall reset the driver slew rate setting back to factory default value.
0x00 – Range Limit
(write only)
User input for driver slew rate control setting or C3 post cursor setting.
If the new user input is out of range specified in subpage 19h/E5h,
the target device shall maintain the current setting
Read Only The current setting value shall be displayed.