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5.4 Command Protocol
C141-E203-01EN 5-141
5.4 Command Protocol
The host should confirm that the BSY bit of the Shadow Block Status register of
the device is 0 prior to issue a command. If BSY bit is 1, the host should wait for
issuing a command until BSY bit is cleared to 0.
Commands can be executed only when the DRDY bit of the Status register is 1.
However, the following commands can be executed even if DRDY bit is 0.
• EXECUTE DEVICE DIAGNOSTIC
• INITIALIZE DEVICE PARAMETERS
5.4.1 Non-data command protocol
Execution of the following commands does not involve data transfer between the
host and the device.
• RECALIBRATE
• SEEK
• READ VERIFY SECTOR(S) (EXT)
• EXECUTE DEVICE DIAGNOSTIC
• INITIALIZE DEVICE PARAMETERS
• SET FEATURES
• SET MULTIPLE MODE
• SET MAX ADDRESS (EXT)
• READ NATIVE MAX ADDRESS (EXT)
• IDLE
• IDLE IMMEDIATE
• STANDBY
• STANDBY IMMEDIATE
• CHECK POWER MODE
• SMART DISABLE OPERATION
• SMART ENABLE/DISABLE AUTOSAVE
• SMART ENABLE OPERATION