26 set features (efh) – Toshiba MK6017MAP User Manual
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10.8.26 Set Features (EFh)
COMMAND CODE
1 1 1 0 1 1 1 1
REGISTER
REGISTER SETTING
NORMAL COMPLETION
DR
DRIVE No.
no change
CY
no
change
HD
no
change
SN
no
change
SC
Mode Selection for Data Transfer(*2)
no change
FT Features(*1)
no
change
(*1) Features: FT register defines following selections.
02H
Enable write cache feature
03H
Select data transfer mode
05H
Enable advanced power management
44H
ECC length is 46 bytes during Read/Write Long command
55H
Disable read look-ahead feature
66H
Disable reverting to power on defaults by soft reset
82H
Disable write cache feature
85H
Disable advanced power management
AAH
Enable read look-ahead feature
BBH
ECC length is 4 bytes during Read/Write Long command
CCH
Enable reverting to power on defaults by soft reset
others
Invalid (reporting with Aborted Command Error)
(*2)Mode selection for data transfer is specified in sector count register. Upper 5 bits show transfer mode
and lower 3 bits show mode figure.
PIO default transfer mode
00000 000
PIO default transfer mode, disable IORDY
00000 001
PIO flow control transfer mode nnn
00001 nnn
Single word DMA mode nnn
00010 nnn
Multiword DMA mode nnn
00100 nnn
Ultra DMA mode nnn
01000 nnn
Reserved 10000
nnn
PIO default mode is mode 4 flow control. DMA default mode is Multiword word DMA mode 2.
The level of Advanced Power Management function is set in Sector count register.
C0h-FEh
Mode0 (Power save up to Performance Idle)
80h-BFh
Mode1 (Power save up to Low Power Idle)
01h-7Fh
Mode2 (Power save up to Standby)
00h,FFh
Aborted
Transition time of power save is changed dynamically in Mode1 and Mode2 due to Adaptive power control
function. The function level is set to Mode1 when Advanced Power Management function is disabled.
If FT register has any other value, the drive rejects the command with Abort Command error.
Default settings after power on or hard reset are:
Data transfer mode of Multiword DMA mode 2, PIO mode 4 flow control,
4 bytes ECC, look-ahead read enabled, write cache enabled, advanced power management enabled,
READ/WRITE Multiple command enabled (16 sectors)
and reverting to power on defaults by soft reset disabled.