Ac characteristics – Rainbow Electronics AT45DB021B User Manual
Page 13
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13
AT45DB021B
1937F–DFLSH–10/02
AC Characteristics
Symbol
Parameter
Min
Max
Units
f
SCK
SCK Frequency
20
MHz
f
CAR
SCK Frequency for Continuous Array Read
20
MHz
t
WH
SCK High Time
22
ns
t
WL
SCK Low Time
22
ns
t
CS
Minimum CS High Time
250
ns
t
CSS
CS Setup Time
250
ns
t
CSH
CS Hold Time
250
ns
t
CSB
CS High to RDY/BUSY Low
200
ns
t
SU
Data In Setup Time
5
ns
t
H
Data In Hold Time
10
ns
t
HO
Output Hold Time
0
ns
t
DIS
Output Disable Time
18
ns
t
V
Output Valid
20
ns
t
XFR
Page to Buffer Transfer/Compare Time
250
µs
t
EP
Page Erase and Programming Time
20
ms
t
P
Page Programming Time
14
ms
t
PE
Page Erase Time
8
ms
t
BE
Block Erase Time
12
ms
t
RST
RESET Pulse Width
10
µs
t
REC
RESET Recovery Time
1
µs
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