smc256af Numonyx, smc256af Datasheet - Page 28

• Manufacturer Part Number: smc256af
• Description: 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte And 512 Mbyte 3.3 V / 5 V Supply Compactflash? Card
• Manufacturer: Numonyx

Command interface
Figure 8.
1. The device addresses consists of −CS0, −CS1, and A2-A0.
2. The Data I/O consist of D15-D0 (16 bit) or D7-D0 (8 bit).
3. −IOCS16 is shown for PIO modes 0, 1 and 2. For other modes, this signal is ignored.
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A0-A2, −CS0, −CS1
Read Data D0-D15
Write Data D0-D15
−IORD/−IOWR
−IOCS16
The timing diagram for True IDE mode of operation in this section is drawn using the
conventions in the ATA-4 specification, which are different than the conventions used in the
PCMCIA specification and earlier versions of this specification. Signals are shown with their
asserted state as High regardless of whether the signal is actually negative or positive true.
Consequently, the -IORD, the -IOWR and the -IOCS16 signals are shown in the diagram
inverted from their electrical states on the bus.
True IDE mode I/O timing diagram
(2)
(1)
(2)
(3)
t7
t1
ADDRESS VALID
t0
t2
t3
t5
VALID
VALID
t4
t6
t6z
t9
t2i
t8
SMCxxxAF
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