SMC128AF NUMONYX [Numonyx B.V], SMC128AF Datasheet - Page 36

• Manufacturer Part Number: SMC128AF
• Manufacturer: NUMONYX [Numonyx B.V]

Card configuration
6.6
Table 32.
36/82
High byte output only
Word output access
High byte input only
Byte output access
Word input access
Byte input access
I/O Read Inhibit
Function code
I/O Write inhibit
Standby mode
(16 bits)
(16 bits)
(8 bits)
(8 bits)
(8 bits)
(8 bits)
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
a 16 bit transfer is attempted, and the
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
addresses (see
I/O function
–REG
X
H
H
L
L
L
L
L
L
L
L
Table
–
IOIS16 signal is asserted by the card, otherwise it is de-asserted. When
–CE2
32).
H
H
H
H
H
X
X
L
L
L
L
–CE1
H
X
X
H
H
L
L
L
L
L
L
A0
X
H
H
X
X
X
L
L
L
L
X
–
IOIS16 signal is not asserted, the system must
–IORD
X
H
H
H
H
H
L
L
L
L
L
–IOWR
H
H
H
H
H
X
L
L
L
L
L
D15 to D8
Don’t care
Don’t care
Don’t care
Odd byte
Odd byte
Odd byte
Odd byte
High Z
High Z
High Z
High Z
–
IOIS16 is asserted for all
Don’t care
Don’t care
Even byte
Even byte
Even byte
Even byte
D7 to D0
Odd byte
Odd byte
SMCxxxAF
High Z
High Z
High Z