SMCXXXAF Datasheet, PDF (38/82 Pages) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

Card configuration
SMCxxxAF
6.8
True IDE mode I/O function
The card can be configured in a True IDE mode of operation. It is configured in this mode
only when the –OE signal is grounded by the host during the power-off to power-on cycle. In
this True IDE mode the PCMCIA protocol and configuration are disabled and only I/O
operations to the task file and data register are allowed. No memory or attribute registers
are accessible to the host. The Set Feature command can be used to put the device in 8 bit
mode (see Table 34).
Removing and reinserting the card while the host computer’s power is on will reconfigure
the card to PC Card ATA mode.
Table 34. True IDE mode I/O function
Function code
–CE2 –CE1 A2 to A0 –IORD –IOWR D15 to D8
D7 to D0
Invalid mode
L
L
X
X
Standby mode
H
H
X
X
Task File Write
H
L
1h-7h H
Task File Read
H
L
1h-7h L
Data Register Write H
L
L
H
Data Register Read H
L
L
L
Control Register Write L
H
6h
H
Alternate Status Read L
H
6h
L
Drive Address
L
H
7h
L
X
High Z
High Z
X
High Z
High Z
L
Don’t care
Data In
H
High Z
Data Out
L
Odd-byte In Even-byte In
H
Odd-byte Out Even-byte Out
L
Don’t care
Control In
H
High Z
Status Out
H
High Z
Data Out
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