T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
~
~
~
1
1
1
G
G
G
C
C
C
F
F
F
8
8
8
0
0
0
80X CompactFlash Card
Transcend Information Inc.
V1.1
22
3.8 Common Memory Write Timing Specification
Cycle Time Mode:
250 ns
120 ns
100 ns
80 ns
Item
Symbol
IEEE
Symbol
Min
ns.
Max
ns.
Min
ns.
Max
ns.
Min
ns.
Max
ns.
Min
ns.
Ma
x
ns.
Data Setup before WE
tsu (D-WEH)
tDVWH
80
50
40
30
Data Hold following WE
th(D)
tWMDX
30
15
10
10
WE Pulse Width
tw(WE)
tWLWH
150
70
60
55
Address Setup Time
tsu(A)
tAVWL
30
15
10
10
CE Setup before WE
tsu(CE)
tELWL
0
0
0
0
Write Recovery Time
trec(WE)
tWMAX
30
15
15
15
Address Hold Time
th(A)
tGHAX
20
15
15
15
CE Hold following WE
th(CE)
tGHEH
20
15
15
10
Wait Delay Falling from WE
tv (WT-WE)
tWLWTV
35
35
35
na
1
WE High from Wait Release tv(WT)
tWTHWH
0
0
0
na
1
Wait Width Time
2
tw (WT)
tWTLWTH
350
350
350
na
1
Notes: 1) –WAIT is not supported in this mode.
2) The maximum load on -WAIT is 1 LSTTL with 50 pF (40pF below 120nsec Cycle Time) total load. All times are in
nanoseconds. Din signifies data provided by the system to the CompactFlash Storage Card. The -WAIT signal may be
ignored if the -WE cycle to cycle time is greater than the Wait Width time. The Max Wait Width time can be determined from
the Card Information Structure. The Wait Width time meets the PCMCIA PC Card specification of 12
µ
s but is intentionally
less in this specification.
