Commands Without Data Transfer; Protocol For The Command Execution Without Data Transfer - Fujitsu MPC3096AT - Desktop 9.7 GB Hard Drive Product Manual

Note:
For transfer of a sector of data, the host needs to read Status register (X'1F7') in order to
clear INTRQ (interrupt) signal. The Status register should be read within a period from the
DRQ setting by the device to 50 s after the completion of the sector data transfer. Note
that the host does not need to read the Status register for the first and the last sector to be
transferred. If the timing to read the Status register does not meet above condition, normal
data transfer operation is not assured guaranteed.
When the host issues the command even if the drive requests the data transfer (DRQ bit is
set), or when the host executes resetting, the device correct operation is not guaranteed.
5.4.3

Commands without data transfer

Execution of the following commands does not involve data transfer between the host and the
device.
RECALIBRATE
SEEK
READY VERIFY SECTOR(S)
EXECUTE DEVICE DIAGNOSTIC
INITIALIZE DEVICE PARAMETERS
SET FEATURES
SET MULTIPLE MODE
IDLE
IDLE IMMEDIATE
STANDBY
STANDBY IMMEDIATE
CHECK POWER MODE
SMART:
Thresholds
Figure 5.6 shows the protocol for the command execution without data transfer.
BSY
DRDY
INTRQ
Figure 5.6
5 - 60
except for SMART Read Attribute values and SMART Read Attribute
Command
Parameter write
~

Protocol for the command execution without data transfer

C141-E055-01EN
Status read