Transcend CompactFlash 400X - Idle and Initialization Commands; Idle Command (97 h;E3 h); Idle Immediate Command (95 h;E1 h); Initialize Drive Parameters Command (91 h)

T
T
T
S
S
S
1
1
1
6
6
6
G
G
G
~
~
~
6
6
6
4
4
4
G
G
G
C
C
C
F
F
F
4
4
4
0
0
0
0
0
0
400X CompactFlash Card
Transcend Information Inc.
V1.0
74

Idle - 97h or E3h
This command causes the CompactFlash Storage Card to set BSY, enter the Idle mode, clear BSY and generate an
interrupt. If the sector count is non-zero, it is interpreted as a timer count with each count being 5 milliseconds and
the automatic power down mode is enabled. If the sector count is zero, the automatic power down mode is disabled.
Note that this time base (5 msec) is different from the ATA specification.
Bit ->
7 6 5 4 3 2 1 0
Command (7)
97h or E3h
C/D/H (6)
X Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
Timer Count (5 msec increments)
Feature (1)
X
 Idle Immediate - 95h or E1h
This command causes the CompactFlash Storage Card to set BSY, enter the Idle mode, clear BSY and generate an
interrupt.
Bit ->
7 6 5 4 3 2 1 0
Command (7)
95h or E1h
C/D/H (6)
X Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
X
Feature (1)
X
 Initialize Drive Parameters - 91h
This command enables the host to set the number of sectors per track and the number of heads per cylinder. Only
the Sector Count and the Card/Drive/Head registers are used by this command.
Bit ->
7 6 5 4 3 2 1 0
Command (7)
91h
C/D/H (6)
X 0 X Drive Max Head (no. of heads-1)
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
Number of Sectors
Feature (1)
X

NOP - 00h