Intel® Solid-State Drive 535 Series (2.5-inch)
Product Specification April 2015
22 332062-002US
5.6 DevSleep
Intel SSD 535 Series supports the DevSleep feature. DevSleep must be enabled on the device by the
host system through the SET FEATURES command. If DevSleep is enabled by the host, the host must drive
the DevSleep signal to proper assert/de-assert voltage levels according to the SATA specification. Entry into
DevSleep must be preceded by LPM slumber entry by host and device. The Intel SSD 535 Series also supports
DevSleep_to_ReducedPwrState which allows the host to wake the drive using normal LPM COMWAKE
out-of-band signaling.
For the Intel SSD 535 Series, the recommended total time to DevSleep for system active state is 6 sec.
The AHCI* controller has 4 parameters used to define proper DevSleep operation between the host and drive.
The following table provides those recommended values for the Intel SSD 535 Series drive.
Table 20: DevSleep Control Parameters
DevSleep Idle Time Out – number of
milliseconds prior to host asserting
DevSleep
DITO Multiplier – set once at boot-up
Minimum DevSleep Assertion Time –
minimum time in milliseconds for
host to assert DevSleep
DevSleep Exit Time Out – max time in
milliseconds from when DevSleep is
negated to when device ready to
detect OOB
Total time to DevSleep entry = DITO * (DM+1)
5.7 SMART Command Transport
With SMART Command Transport (SCT), a host can send commands and data to an SSD and receive status and
data from an SSD using standard write/read commands to manipulate two SMART Logs:
Log Address E0h ("SCT Command/Status") — used to send commands and retrieve status
Log Address E1h ("SCT Data Transfer") — used to transport data
Commentaires sur ces manuels