Datasheet

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SBAS253E − MAY 2003 − REVISED JULY 2006
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32
3.4.2.2 Write Timing Characteristics
(1)
Over recommended operating free-air temperature range at –40_C to +85_C, AV
DD
= 5V, BV
DD
= 3V − 5V.
PARAMETER
SYMBOL MIN MAX UNIT
Delay time from R/W LOW to CS LOW t
D1
0 ns
Access time from CS LOW to WE HIGH t
A1
25 ns
Width time for WE LOW t
W1
20 ns
Width time for WE HIGH
(2)
t
W2
10 ns
Setup time, address valid before rising edge of WE t
SU1
10 ns
Hold time, address valid after rising edge of WE t
H1
5 ns
Setup time, data valid before rising edge of WE t
SU2
10 ns
Hold time, data valid after rising edge of WE t
H2
5 ns
Delay time from WE HIGH to CS HIGH t
D2
10 ns
Delay time from CS HIGH to R/W HIGH t
D3
0 ns
(1) All input signals are specified with t
R
= t
F
= 5ns (10% to 90% of BV
DD
) and timed from a voltage level of (V
IL
+ V
IH
)/2.
(2) One or more write cycles can be performed in one CS
cycle.
CS
t
D1
t
A1
t
D3
t
W1
t
W2
t
D2
t
SU1
t
H1
t
SU1
t
H1
t
SU2
t
H2
t
SU2
t
H2
R/W
WE
A(5:0)
D(15.0)
Figure 1−15. Mode 10 Write Access