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Figure 8: True IDE PIO mode Read/Write waveforms
1.
2.
3.
The device addresses consists of – CS0 , ?CS1, and A2 -A0.
The Data I/O consist of D15-D0 (16-bit) or D7-D0 (8 bit).
– IOCS16 is shown for PIO modes 0, 1 and 2. For other modes, this signal is ignored.
Table 24: True IDE PIO mode Read/Write timing(1)
Parameter
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
Symbol
t 0(2)
t 1
t 2(2)
t 2(2)
t 2i(2)
t 3
t 4
t 5
t 6z(3)
t 7(4)
t 8(4)
t 7
t 9
Mode 0
(ns)
600
70
165
290
-
60
30
50
5
30
90
60
20
1
(ns)
383
50
125
290
-
45
20
35
5
30
50
45
15
2
(ns)
240
30
100
290
-
30
15
20
5
30
40
30
10
3
(ns)
180
30
80
80
70
30
10
20
5
30
NA
NA
10
4
(ns)
120
25
70
70
25
20
10
20
5
30
NA
NA
10
5 (5)
(ns)
100
15
65
65
25
20
5
15
5
20
NA
NA
10
6 (5)
(ns)
80
10
55
55
20
15
5
10
5
20
NA
NA
10
1.
2.
3.
4.
The maximum load on – IOCS16 is 1 LSTTL with a 50pF total load.
t 0 is the minimum total cycle time, t 2 is the minimum command active time, and t 2i is the minimum command recovery time or
command inactive time. The actual cycle time equals the sum of the actual command inactive time. The three timing requirements
of t0, t 2 , and t 2i have to be met. The requirement is greater than the sum of t 2 and t 2i . This means a host implementation can ensure
that t0 is equal to or greater than the value reported in the devices identify drive Card implementation should support any legal
host implementation.
This parameter specifies the time from the falling edge of – IORD to the moment when the CompactFlash Memory Card (tri-state).
t 7 and t 8 apply only to modes 0, 1 and 2. The – IOCS16 signal is not valid for other modes.
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.20
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-320_data_sheet_CF-HxBO_Rev120.doc
Page 23 of 101
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