SMCXXXAF Datasheet, PDF (58/82 Pages) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

CF-ATA command description
SMCxxxAF
9.5
Idle command (97h or E3h)
This command causes the 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 (each count is
5 ms) 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 ms) is different from
the ATA specification. Table 53 defines the byte sequence of the Idle command.
Table 53. Idle
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
Sect Num (3)
X
Sect Cnt (2)
Timer Count (5 ms increments)
Feature (1)
X
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