Datasheet

ATA Compliant Commands
Check Power Mode
Although this command is supported for backward compatibility, it has no actual function. The card will always
return the Not In Standby mode code "00h" in the Sector Count register, in response to this command. Command
completion status will always indicate command completed with no error.
Check Power Mode Command Issued by Host
Task File Register 7 6 5 4 3 2 1 0
COMMAND 98h/E5h
DRIVE/HEAD nu nu nu D nu
CYLINDER HI nu
CYLINDER LOW nu
SECTOR START nu
SECTOR COUNT nu
FEATURES nu
Command Block specified upon completion/termination of Check Power Mode command (98h/E5h)
Task File Register
7 6 5 4 3 2 1 0
BSY DRDY DWF DSC DRQ CORR IDX ERR
STATUS 0 1 0 1 V V 0 0
DRIVE/HEAD na na na na na
CYLINDER HI na
CYLINDER LOW na
SECTOR na
SECTOR COUNT Power Mode Code. Will always be 00
BBK UNC MC IDNF MCR ABRT TK0NF AMNF
ERROR 0 0 0 0 0 0 0 0