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SMC032AF Datasheet(PDF) 36 Page - Numonyx B.V

No. de pieza SMC032AF
Descripción Electrónicos  32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash??card
PDF  82 Pages
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Fabricante Electrónico  NUMONYX [Numonyx B.V]
Página de inicio  http://www.numonyx.com
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SMC032AF Datasheet(HTML) 36 Page - Numonyx B.V

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Card configuration
SMCxxxAF
36/82
6.6
I/O transfer function
The I/O transfer to or from the card can be either 8 or 16 bits. When a 16 bit accessible port
is addressed, the –IOIS16 signal is asserted by the card, otherwise it is de-asserted. When
a 16 bit transfer is attempted, and the –IOIS16 signal is not asserted, the system must
generate a pair of 8 bit references to access the word’s even and odd bytes. The card
permits both 8 and 16 bit accesses to all of its I/O addresses, so –IOIS16 is asserted for all
addresses (see Table 32).
Table 32.
I/O function
Function code
–REG
–CE2
–CE1
A0
–IORD
–IOWR
D15 to D8
D7 to D0
Standby mode
X
H
H
X
X
X
High Z
High Z
Byte input access
(8 bits)
L
L
H
H
L
L
L
H
L
L
H
H
High Z
High Z
Even byte
Odd byte
Byte output access
(8 bits)
L
L
H
H
L
L
L
H
H
H
L
L
Don’t care
Don’t care
Even byte
Odd byte
Word input access
(16 bits)
L
L
L
L
L
H
Odd byte
Even byte
Word output access
(16 bits)
L
L
L
L
H
L
Odd byte
Even byte
I/O Read Inhibit
H
X
X
X
L
H
Don’t care
Don’t care
I/O Write inhibit
H
X
X
X
H
L
High Z
High Z
High byte input only
(8 bits)
L
L
H
X
L
H
Odd byte
High Z
High byte output only
(8 bits)
L
L
H
X
H
L
Odd byte
Don’t care



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