smc256af Numonyx, smc256af Datasheet - Page 29

• 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

SMCxxxAF
Table 22.
1. The maximum load on -IOCS16 is 1 LSTTL with a 50 pF total load.
2. t
3. This parameter specifies the time from the falling edge of -IORD to the moment when the data bus is no longer driven by
4. t
Symbol
t
t
t
t
t
t
t
6Z
2i
or command inactive time. The actual cycle time equals the sum of the actual command active time and the actual
command inactive time. The three timing requirements of t
requirement is greater than the sum of t
ensure that t
card implementation should support any legal host implementation.
the CompactFlash memory card (tri-state).
0
2
2
7
8
0
7
t
t
t
t
t
t
(2)
1
(2)
(2)
3
4
5
6
(4)
(4)
9
(2)
(3)
is the minimum total cycle time, t
and t
8
Cycle time (min)
Address Valid to -IORD/-IOWR
setup (min)
-IORD/-IOWR (min)
-IORD/-IOWR (min) register (8
bit)
-IORD/-IOWR recovery time (min)
-IOWR data setup (min)
-IOWR data hold (min)
-IORD data setup (min)
-IORD data hold (min)
-IORD data tri-state (max)
Address valid to -IOCS16
assertion (max)
Address valid to -IOCS16
released (max)
-IORD/-IOWR to address valid
hold
apply only to modes 0, 1 and 2. This signal is not valid for other modes.
True IDE mode I/O Read/Write timing diagram
0
is equal to or greater than the value reported in the device's identify drive data. A CompactFlash memory
Parameter
(1)
2
is the minimum command active time, and t
2
and t
2i
. This means a host implementation can lengthen either or both t
Mode 0
600
165
290
70
60
30
50
30
90
60
20
5
-
0
, t
2
, and t
Mode 1
383
125
290
50
45
20
35
30
50
45
15
5
-
2i
have to be met. The minimum total cycle time
Mode 2
240
100
290
2i
30
30
15
20
30
40
30
10
5
-
is the minimum command recovery time
Mode 3
180
N/A
N/A
30
30
80
80
70
30
10
20
10
5
Command interface
Mode 4
120
N/A
N/A
25
70
70
25
20
10
20
30
10
5
2
or t
2i
Unit
to
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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